http://wiki.dd-wrt.com/wiki/index.php?title=Asus_RT-N66U&curid=5205&action=history&feed=atom Asus RT-N66U - Revision history 2024-03-28T14:41:51Z Revision history for this page on the wiki MediaWiki 1.10.1 http://wiki.dd-wrt.com/wiki/index.php?title=Asus_RT-N66U&diff=56572&oldid=prev Kernel-panic69: /* Installation Instructions */ (add some amplifying information regarding accessing router webUI, formatting) 2023-06-01T02:31:04Z <p><span class="autocomment">Installation Instructions -</span> (add some amplifying information regarding accessing router webUI, formatting)</p> <table border='0' width='98%' cellpadding='0' cellspacing='4' style="background-color: white;"> <tr> <td colspan='2' width='50%' align='center' style="background-color: white;">←Older revision</td> <td colspan='2' width='50%' align='center' style="background-color: white;">Revision as of 02:31, 1 June 2023</td> </tr> <tr><td colspan="2" align="left"><strong>Line 44:</strong></td> <td colspan="2" align="left"><strong>Line 44:</strong></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">&lt;br&gt;</td><td> </td><td style="background: #eee; font-size: smaller;">&lt;br&gt;</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">=Installation Instructions=</td><td> </td><td style="background: #eee; font-size: smaller;">=Installation Instructions=</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">Read the [[Firmware FAQ]], [https://www.dd-wrt.com/phpBB2/viewtopic.php?t=51486 Peacock Announcement], new build, and model-specific threads.</td><td>+</td><td style="background: #cfc; font-size: smaller;">Read the [[Firmware FAQ]], [https://www.dd-wrt.com/phpBB2/viewtopic.php?t=51486 Peacock Announcement], new build, and model-specific threads.<ins style="color: red; font-weight: bold; text-decoration: none;">&lt;br&gt;</ins></td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">'''&lt;span style=&quot;color:#ff0000&quot;&gt;WARNING&lt;/span&gt;:''' This 'Dark Night' presents significant risk to bricking that requires careful adherence to the installation process<del style="color: red; font-weight: bold; text-decoration: none;">. However</del>, there is a built-in and robust Recovery Mode. The NVRAM issue has been resolved in newer CFE versions (and K3X builds).</td><td>+</td><td style="background: #cfc; font-size: smaller;">'''&lt;span style=&quot;color:#ff0000&quot;&gt;WARNING&lt;/span&gt;:''' This 'Dark Night' presents significant risk to bricking that requires careful adherence to the installation process<ins style="color: red; font-weight: bold; text-decoration: none;">, however</ins>, there is a built-in and robust Recovery Mode.<ins style="color: red; font-weight: bold; text-decoration: none;">&lt;br&gt; </ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">'''NOTE:''' </ins>The NVRAM issue has been resolved in newer CFE versions (and K3X builds).<ins style="color: red; font-weight: bold; text-decoration: none;">&lt;br&gt;</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">'''NOTE:''' It is '''''highly''''' recommended to use Private, Incognito, InPrivate browsing mode with no extensions or add-ons enabled, and no passwords saved to the browser in any way when flashing or accessing the webUI. It is preferred to use a Portable browser such as Firefox, Firefox ESR, or Pale Moon. If you run into issues, clear browser cache or override with CTRL+F5&lt;br&gt; </ins></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">===Preparation===</td><td> </td><td style="background: #eee; font-size: smaller;">===Preparation===</td></tr> </table> Kernel-panic69 http://wiki.dd-wrt.com/wiki/index.php?title=Asus_RT-N66U&diff=56571&oldid=prev Kernel-panic69: (formatting) 2023-05-31T19:03:19Z <p>(formatting)</p> <table border='0' width='98%' cellpadding='0' cellspacing='4' style="background-color: white;"> <tr> <td colspan='2' width='50%' align='center' style="background-color: white;">←Older revision</td> <td colspan='2' width='50%' align='center' style="background-color: white;">Revision as of 19:03, 31 May 2023</td> </tr> <tr><td colspan="2" align="left"><strong>Line 1:</strong></td> <td colspan="2" align="left"><strong>Line 1:</strong></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">{{Languages|Asus RT-N66U}}</td><td> </td><td style="background: #eee; font-size: smaller;">{{Languages|Asus RT-N66U}}</td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;">&lt;br&gt;</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">[[Image:ASUS RT-N66U.jpg | right | 360px]]</td><td> </td><td style="background: #eee; font-size: smaller;">[[Image:ASUS RT-N66U.jpg | right | 360px]]</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">&#160;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">__TOC__</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">&lt;br&gt;</ins></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">=Hardware [http://en.techinfodepot.shoutwiki.com/wiki/ASUS_RT-N66U Specifications]=</td><td> </td><td style="background: #eee; font-size: smaller;">=Hardware [http://en.techinfodepot.shoutwiki.com/wiki/ASUS_RT-N66U Specifications]=</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">{| border=&quot;1&quot; cellspacing=&quot;0&quot;</td><td>+</td><td style="background: #cfc; font-size: smaller;">{| <ins style="color: red; font-weight: bold; text-decoration: none;">style=&quot;text-align:center; position:relative; &quot; width=50% </ins>border=&quot;1&quot; cellspacing=&quot;0&quot;</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">!CPU</td><td> </td><td style="background: #eee; font-size: smaller;">!CPU</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">|Broadcom 4706 @ 600MHz</td><td> </td><td style="background: #eee; font-size: smaller;">|Broadcom 4706 @ 600MHz</td></tr> <tr><td colspan="2" align="left"><strong>Line 40:</strong></td> <td colspan="2" align="left"><strong>Line 42:</strong></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">|8, n, 1, no flow control, 115200.</td><td> </td><td style="background: #eee; font-size: smaller;">|8, n, 1, no flow control, 115200.</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">|}</td><td> </td><td style="background: #eee; font-size: smaller;">|}</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">&#160;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">&lt;br&gt;</ins></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">=Installation Instructions=</td><td> </td><td style="background: #eee; font-size: smaller;">=Installation Instructions=</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">Read the [[Firmware FAQ]], [https://www.dd-wrt.com/phpBB2/viewtopic.php?t=51486 Peacock Announcement], new build, and model-specific threads.</td><td> </td><td style="background: #eee; font-size: smaller;">Read the [[Firmware FAQ]], [https://www.dd-wrt.com/phpBB2/viewtopic.php?t=51486 Peacock Announcement], new build, and model-specific threads.</td></tr> </table> Kernel-panic69 http://wiki.dd-wrt.com/wiki/index.php?title=Asus_RT-N66U&diff=56570&oldid=prev Kernel-panic69: (move warning, label as such, formatting) 2023-05-31T18:57:25Z <p>(move warning, label as such, formatting)</p> <table border='0' width='98%' cellpadding='0' cellspacing='4' style="background-color: white;"> <tr> <td colspan='2' width='50%' align='center' style="background-color: white;">←Older revision</td> <td colspan='2' width='50%' align='center' style="background-color: white;">Revision as of 18:57, 31 May 2023</td> </tr> <tr><td colspan="2" align="left"><strong>Line 1:</strong></td> <td colspan="2" align="left"><strong>Line 1:</strong></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">{{Languages|Asus RT-N66U}}</td><td> </td><td style="background: #eee; font-size: smaller;">{{Languages|Asus RT-N66U}}</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">[[Image:ASUS RT-N66U.jpg | right | 360px]]</td><td> </td><td style="background: #eee; font-size: smaller;">[[Image:ASUS RT-N66U.jpg | right | 360px]]</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"></td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">This 'Dark Night' presents significant risk to bricking that requires careful adherence to the installation process. However, there is a built-in and robust Recovery Mode. The NVRAM issue has been resolved in newer CFE versions (and K3X builds).</td><td colspan="2">&nbsp;</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">=Hardware [http://en.techinfodepot.shoutwiki.com/wiki/ASUS_RT-N66U Specifications]=</td><td> </td><td style="background: #eee; font-size: smaller;">=Hardware [http://en.techinfodepot.shoutwiki.com/wiki/ASUS_RT-N66U Specifications]=</td></tr> <tr><td colspan="2" align="left"><strong>Line 45:</strong></td> <td colspan="2" align="left"><strong>Line 43:</strong></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">=Installation Instructions=</td><td> </td><td style="background: #eee; font-size: smaller;">=Installation Instructions=</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">Read the [[Firmware FAQ]], [https://www.dd-wrt.com/phpBB2/viewtopic.php?t=51486 Peacock Announcement], new build, and model-specific threads.</td><td> </td><td style="background: #eee; font-size: smaller;">Read the [[Firmware FAQ]], [https://www.dd-wrt.com/phpBB2/viewtopic.php?t=51486 Peacock Announcement], new build, and model-specific threads.</td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;">'''&lt;span style=&quot;color:#ff0000&quot;&gt;WARNING&lt;/span&gt;:''' This 'Dark Night' presents significant risk to bricking that requires careful adherence to the installation process. However, there is a built-in and robust Recovery Mode. The NVRAM issue has been resolved in newer CFE versions (and K3X builds).</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">===Preparation===</td><td> </td><td style="background: #eee; font-size: smaller;">===Preparation===</td></tr> </table> Kernel-panic69 http://wiki.dd-wrt.com/wiki/index.php?title=Asus_RT-N66U&diff=56091&oldid=prev Kernel-panic69: /* NVRAM issue */ 2021-10-15T14:40:52Z <p><span class="autocomment">NVRAM issue</span></p> <table border='0' width='98%' cellpadding='0' cellspacing='4' style="background-color: white;"> <tr> <td colspan='2' width='50%' align='center' style="background-color: white;">←Older revision</td> <td colspan='2' width='50%' align='center' style="background-color: white;">Revision as of 14:40, 15 October 2021</td> </tr> <tr><td colspan="2" align="left"><strong>Line 152:</strong></td> <td colspan="2" align="left"><strong>Line 152:</strong></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">'''For newer CFE version updates''' and procedures see here: [https://www.snbforums.com/threads/cfe-bootloader-update.8259/ SNB Forums]&lt;br&gt;</td><td> </td><td style="background: #eee; font-size: smaller;">'''For newer CFE version updates''' and procedures see here: [https://www.snbforums.com/threads/cfe-bootloader-update.8259/ SNB Forums]&lt;br&gt;</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">Note: CFE <del style="color: red; font-weight: bold; text-decoration: none;">can be thought of, as </del>a bootloader for routers. The CFE is what loads the firmware when using ASUS Recovery Utility (and/or a TFTP tool)</td><td>+</td><td style="background: #cfc; font-size: smaller;">Note: CFE <ins style="color: red; font-weight: bold; text-decoration: none;">is </ins>a bootloader for routers. The CFE is what loads the firmware when using ASUS Recovery Utility (and/or a TFTP tool)</td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;">&#160;</td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">NOTE: Why does the wiki not state to use the K26 nv64k upgrade images with the updated CFE? -kp69</ins></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">==CFE Version (or Update)==</td><td> </td><td style="background: #eee; font-size: smaller;">==CFE Version (or Update)==</td></tr> </table> Kernel-panic69 http://wiki.dd-wrt.com/wiki/index.php?title=Asus_RT-N66U&diff=56090&oldid=prev Kernel-panic69: /* DD-WRT Alternatives */ 2021-10-15T14:35:14Z <p><span class="autocomment">DD-WRT Alternatives</span></p> <table border='0' width='98%' cellpadding='0' cellspacing='4' style="background-color: white;"> <tr> <td colspan='2' width='50%' align='center' style="background-color: white;">←Older revision</td> <td colspan='2' width='50%' align='center' style="background-color: white;">Revision as of 14:35, 15 October 2021</td> </tr> <tr><td colspan="2" align="left"><strong>Line 185:</strong></td> <td colspan="2" align="left"><strong>Line 185:</strong></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">TomatoUSB [http://tomato.groov.pl/ Shibby] also implemented a 64k NVRAM solution for 32K NVRAM CFE in 2012.</td><td> </td><td style="background: #eee; font-size: smaller;">TomatoUSB [http://tomato.groov.pl/ Shibby] also implemented a 64k NVRAM solution for 32K NVRAM CFE in 2012.</td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;">[https://www.freshtomato.org/ FreshTomato] also supports this device and includes the 64K nvram solution from Shibby.</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">==Historical Build Information==</td><td> </td><td style="background: #eee; font-size: smaller;">==Historical Build Information==</td></tr> </table> Kernel-panic69 http://wiki.dd-wrt.com/wiki/index.php?title=Asus_RT-N66U&diff=56089&oldid=prev Kernel-panic69: /* NVRAM issue */ 2021-10-15T14:31:37Z <p><span class="autocomment">NVRAM issue</span></p> <table border='0' width='98%' cellpadding='0' cellspacing='4' style="background-color: white;"> <tr> <td colspan='2' width='50%' align='center' style="background-color: white;">←Older revision</td> <td colspan='2' width='50%' align='center' style="background-color: white;">Revision as of 14:31, 15 October 2021</td> </tr> <tr><td colspan="2" align="left"><strong>Line 146:</strong></td> <td colspan="2" align="left"><strong>Line 146:</strong></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">At launch, the RT-N66U was limited to 32k nvram. However, CFE (bootloader) version 1.0.1.3 added 64k nvram support around April 2013, but was not compatible with DD-WRT firmware at that time. For details, see these forum links to historical nvram and 64K implemention discussions: [http://www.dd-wrt.com/phpBB2/viewtopic.php?t=86437&amp;postdays=0&amp;postorder=asc&amp;highlight=otrw+light&amp;start=1022 Fractal comments] and [http://www.dd-wrt.com/phpBB2/viewtopic.php?t=163479&amp;start=217 &quot;RT-N66 CFE Thread&quot;]</td><td> </td><td style="background: #eee; font-size: smaller;">At launch, the RT-N66U was limited to 32k nvram. However, CFE (bootloader) version 1.0.1.3 added 64k nvram support around April 2013, but was not compatible with DD-WRT firmware at that time. For details, see these forum links to historical nvram and 64K implemention discussions: [http://www.dd-wrt.com/phpBB2/viewtopic.php?t=86437&amp;postdays=0&amp;postorder=asc&amp;highlight=otrw+light&amp;start=1022 Fractal comments] and [http://www.dd-wrt.com/phpBB2/viewtopic.php?t=163479&amp;start=217 &quot;RT-N66 CFE Thread&quot;]</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">This was resolved with DD-WRT K3X builds (kernel 3.x) which extended nvram to 64k, and can be used for any CFE version. It was eventually [https://<del style="color: red; font-weight: bold; text-decoration: none;">www</del>.dd-wrt.com/<del style="color: red; font-weight: bold; text-decoration: none;">forum</del>/viewtopic.php?p=1112621#1112621 extended to 256k].</td><td>+</td><td style="background: #cfc; font-size: smaller;">This was resolved with DD-WRT K3X builds (kernel 3.x) which extended nvram to 64k, and can be used for any CFE version. It was eventually [https://<ins style="color: red; font-weight: bold; text-decoration: none;">forum</ins>.dd-wrt.com/<ins style="color: red; font-weight: bold; text-decoration: none;">phpBB2</ins>/viewtopic.php?p=1112621#1112621 extended to 256k].</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">More historical info: http://charleswilkinson.co.uk/2012/12/22/dd-wrt-on-the-asus-rt-n66u-with-64k-cfe/</td><td> </td><td style="background: #eee; font-size: smaller;">More historical info: http://charleswilkinson.co.uk/2012/12/22/dd-wrt-on-the-asus-rt-n66u-with-64k-cfe/</td></tr> </table> Kernel-panic69 http://wiki.dd-wrt.com/wiki/index.php?title=Asus_RT-N66U&diff=56088&oldid=prev Kernel-panic69: /* CFE Version (or Update) */ 2021-10-15T14:27:52Z <p><span class="autocomment">CFE Version (or Update)</span></p> <table border='0' width='98%' cellpadding='0' cellspacing='4' style="background-color: white;"> <tr> <td colspan='2' width='50%' align='center' style="background-color: white;">←Older revision</td> <td colspan='2' width='50%' align='center' style="background-color: white;">Revision as of 14:27, 15 October 2021</td> </tr> <tr><td colspan="2" align="left"><strong>Line 155:</strong></td> <td colspan="2" align="left"><strong>Line 155:</strong></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">==CFE Version (or Update)==</td><td> </td><td style="background: #eee; font-size: smaller;">==CFE Version (or Update)==</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">[[Asus_RT-N66U#DD-WRT_Alternatives|AsusWRT-Merlin]] can be installed to enable telnet/ssh. telnet/ssh <del style="color: red; font-weight: bold; text-decoration: none;">and </del>then be used to check the CFE version. DD-WRT can then be flashed directly from Asuswrt-Merlin</td><td>+</td><td style="background: #cfc; font-size: smaller;">[[Asus_RT-N66U#DD-WRT_Alternatives|AsusWRT-Merlin]] can be installed to enable telnet/ssh. telnet/ssh <ins style="color: red; font-weight: bold; text-decoration: none;">can </ins>then be used to check <ins style="color: red; font-weight: bold; text-decoration: none;">the CFE version as well as update </ins>the CFE version. DD-WRT can then be flashed directly from Asuswrt-Merlin</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">Find the CFE version:</td><td> </td><td style="background: #eee; font-size: smaller;">Find the CFE version:</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">*in telnet/ssh type: nvram get bl_version</td><td>+</td><td style="background: #cfc; font-size: smaller;">*in telnet/ssh type: nvram get bl_version or strings /dev/mtd0ro | grep bl_ver</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"><del style="color: red; font-weight: bold; text-decoration: none;">*</del>or <del style="color: red; font-weight: bold; text-decoration: none;">look at the CFE partition. In telnet/ssh type: </del>strings /dev/mtd0ro | grep bl_ver</td><td>+</td><td style="background: #cfc; font-size: smaller;"></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"><del style="color: red; font-weight: bold; text-decoration: none;">ToDo</del>: </td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">To update the CFE version</ins>:</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">* <del style="color: red; font-weight: bold; text-decoration: none;">link to Asus CFE sources </del></td><td>+</td><td style="background: #cfc; font-size: smaller;">* <ins style="color: red; font-weight: bold; text-decoration: none;">https://deviwiki</ins>.<ins style="color: red; font-weight: bold; text-decoration: none;">com/wiki/ASUS_RT-N66U/CFE_bootloader_update</ins></td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"><del style="color: red; font-weight: bold; text-decoration: none;">* newest CFE version (as of July 2020) is 1</del>.<del style="color: red; font-weight: bold; text-decoration: none;">0.1.9</del></td><td>+</td><td style="background: #cfc; font-size: smaller;"></td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"><del style="color: red; font-weight: bold; text-decoration: none;">* how to update the CFE</del></td><td>+</td><td style="background: #cfc; font-size: smaller;"></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">==K3.X Builds==</td><td> </td><td style="background: #eee; font-size: smaller;">==K3.X Builds==</td></tr> </table> Kernel-panic69 http://wiki.dd-wrt.com/wiki/index.php?title=Asus_RT-N66U&diff=56087&oldid=prev Kernel-panic69: /* Preparation */ 2021-10-15T14:22:28Z <p><span class="autocomment">Preparation</span></p> <table border='0' width='98%' cellpadding='0' cellspacing='4' style="background-color: white;"> <tr> <td colspan='2' width='50%' align='center' style="background-color: white;">←Older revision</td> <td colspan='2' width='50%' align='center' style="background-color: white;">Revision as of 14:22, 15 October 2021</td> </tr> <tr><td colspan="2" align="left"><strong>Line 49:</strong></td> <td colspan="2" align="left"><strong>Line 49:</strong></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">* If upgrading to DD-WRT from other firmwares, then use a '''*.trx''' file, as in '''*_RT-N66U.trx''' file for initial flash and upgrades, '''or only half the memory will be available''' (with ASUS routers, using a *.trx file is always a safe bet). </td><td> </td><td style="background: #eee; font-size: smaller;">* If upgrading to DD-WRT from other firmwares, then use a '''*.trx''' file, as in '''*_RT-N66U.trx''' file for initial flash and upgrades, '''or only half the memory will be available''' (with ASUS routers, using a *.trx file is always a safe bet). </td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">* If you are upgrading from one version of DD-WRT to a different (newer/older) version of DD-WRT, you can also use the firmwares that end in '''*.bin'''. as in '''_mega.bin''' or '''_big.bin''' </td><td> </td><td style="background: #eee; font-size: smaller;">* If you are upgrading from one version of DD-WRT to a different (newer/older) version of DD-WRT, you can also use the firmwares that end in '''*.bin'''. as in '''_mega.bin''' or '''_big.bin''' </td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">* '''&lt;font color=&quot;red&quot;&gt;IMPORTANT:&lt;/font&gt;<del style="color: red; font-weight: bold; text-decoration: none;">''' determine </del>what version of CFE you have on your router, </td><td>+</td><td style="background: #cfc; font-size: smaller;">* '''&lt;font color=&quot;red&quot;&gt;IMPORTANT:&lt;/font&gt; <ins style="color: red; font-weight: bold; text-decoration: none;">[[Asus_RT-N66U#CFE_Version_.28or_Update.29|Determine </ins>what version of CFE you have on your router<ins style="color: red; font-weight: bold; text-decoration: none;">]]</ins>, &lt;font color=&quot;red&quot;&gt;if CFE v1.0.1.3 (64K nvram) or 'NEWER' - DO NOT USE K2.6 builds&lt;/font&gt;''' </td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"><del style="color: red; font-weight: bold; text-decoration: none;">: '''</del>&lt;font color=&quot;red&quot;&gt;if CFE v1.0.1.3 (64K nvram) or 'NEWER' - DO NOT USE K2.6 builds&lt;/font&gt;''' </td><td>+</td><td style="background: #cfc; font-size: smaller;">* If using Older CFE (32K nvram) you can use K2.6 <ins style="color: red; font-weight: bold; text-decoration: none;">builds</ins></td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">* If using Older CFE (32K nvram) you can use K2.6</td><td>+</td><td style="background: #cfc; font-size: smaller;"></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">* Reset '''BEFORE''' and '''AFTER''' firmware upload. If upgrading from DD-WRT to a newer version of DD-WRT, then ''before'' is (mainly) optional.</td><td> </td><td style="background: #eee; font-size: smaller;">* Reset '''BEFORE''' and '''AFTER''' firmware upload. If upgrading from DD-WRT to a newer version of DD-WRT, then ''before'' is (mainly) optional.</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">* Refer to the [[Asus_RT-N66U#Notes|Notes]] section below if any of the following steps are confusing</td><td> </td><td style="background: #eee; font-size: smaller;">* Refer to the [[Asus_RT-N66U#Notes|Notes]] section below if any of the following steps are confusing</td></tr> </table> Kernel-panic69 http://wiki.dd-wrt.com/wiki/index.php?title=Asus_RT-N66U&diff=56086&oldid=prev Kernel-panic69 at 14:11, 15 October 2021 2021-10-15T14:11:48Z <p></p> <table border='0' width='98%' cellpadding='0' cellspacing='4' style="background-color: white;"> <tr> <td colspan='2' width='50%' align='center' style="background-color: white;">←Older revision</td> <td colspan='2' width='50%' align='center' style="background-color: white;">Revision as of 14:11, 15 October 2021</td> </tr> <tr><td colspan="2" align="left"><strong>Line 42:</strong></td> <td colspan="2" align="left"><strong>Line 42:</strong></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">|8, n, 1, no flow control, 115200.</td><td> </td><td style="background: #eee; font-size: smaller;">|8, n, 1, no flow control, 115200.</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">|}</td><td> </td><td style="background: #eee; font-size: smaller;">|}</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"></td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">=Prerequisite Information=</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"></td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">==Reset button for Recovery==</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">Pressing the Reset button (labeled like ' &gt; o &lt; ') at powerup will put the N66U into recovery mode. </td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">*Press and hold the reset button then plug in power until the power LED starts blinking. Access recovery mode at 192.168.1.1.</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"></td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">==WPS button to Clear NVRAM==</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">Pressing the WPS button at powerup will reset (clear NVRAM) to default settings.</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">*Press and hold the WPS button while plugging in the power for about ten seconds. All the LEDs should flash, indicating settings have been reset to default settings.</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"></td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">==NVRAM issue==</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">'''&lt;font color=&quot;red&quot;&gt;IMPORTANT: DO NOT USE K2.6 builds&lt;/font&gt; if using CFE v1.0.1.3 (64K nvram) or NEWER!!!'''&lt;br&gt;</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">At launch, the RT-N66U was limited to 32k nvram. However, CFE (bootloader) version 1.0.1.3 added 64k nvram support around April 2013, but was not compatible with DD-WRT firmware at that time. For details, see these forum links to historical nvram and 64K implemention discussions: [http://www.dd-wrt.com/phpBB2/viewtopic.php?t=86437&amp;postdays=0&amp;postorder=asc&amp;highlight=otrw+light&amp;start=1022 Fractal comments] and [http://www.dd-wrt.com/phpBB2/viewtopic.php?t=163479&amp;start=217 &quot;RT-N66 CFE Thread&quot;]</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"></td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">This was resolved with DD-WRT K3X builds (kernel 3.x) which extended nvram to 64k, and can be used for any CFE version. It was eventually [https://www.dd-wrt.com/forum/viewtopic.php?p=1112621#1112621 extended to 256k].</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"></td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">More historical info: http://charleswilkinson.co.uk/2012/12/22/dd-wrt-on-the-asus-rt-n66u-with-64k-cfe/</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"></td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">'''For newer CFE version updates''' and procedures see here: [https://www.snbforums.com/threads/cfe-bootloader-update.8259/ SNB Forums]&lt;br&gt;</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"></td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">Note: CFE can be thought of, as a bootloader for routers. The CFE is what loads the firmware when using ASUS Recovery Utility (and/or a TFTP tool)</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"></td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">==CFE Version (or Update)==</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">[[Asus_RT-N66U#DD-WRT_Alternatives|AsusWRT-Merlin]] can be installed to enable telnet/ssh. telnet/ssh and then be used to check the CFE version. DD-WRT can then be flashed directly from Asuswrt-Merlin</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"></td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">Find the CFE version:</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">*in telnet/ssh type: nvram get bl_version</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">*or look at the CFE partition. In telnet/ssh type: strings /dev/mtd0ro | grep bl_ver</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"></td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"></td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">ToDo: </td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">* link to Asus CFE sources </td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">* newest CFE version (as of July 2020) is 1.0.1.9</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">* how to update the CFE</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"></td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">==K3.X Builds==</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">*Use RT-N66U.trx ''big'' or ''mega'' builds in the ''Broadcom_K3X'' folder. [https://forum.dd-wrt.com/phpBB2/viewtopic.php?p=1150414 Forum note] about the difference between ''mega'' and ''big''</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">*See [[Firmware_FAQ#Where_do_I_download_firmware.3F|Where do I download firmware]] for links and read forum build threads.</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"></td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">Note: do NOT use build 40559 - 40559 is broken for most routers, despite being the recommended build for many routers in the Router Database. Search forum &quot;New build&quot; to get the latest updated info about builds (noted Aug 2020).</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"></td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">==K2.6 Builds==</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">USB (and thus MMC) also does not work in K2.6 builds. USB devices cause a kernel panic: see [http://svn.dd-wrt.com/ticket/2580 SVN ticket]. Use a K3.x build (see above), which also works around the NVRAM issue.</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"></td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">'''NOTE:''' All K2.6 builds between 43136 and 44112 are broken. [https://forum.dd-wrt.com/phpBB2/viewtopic.php?p=1213600#1212757 REF]</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"></td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">== DD-WRT Alternatives ==</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">User Merlin implemented a solution in mid-2012 to extend the original 32k NVRAM CFE to ~60k NVRAM in firmware</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">* After 380.70 Asuswrt-Merlin stopped supporting RT-N66U. So earlier versions will still work (to enable SSH/Telnet)</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">** Homepage: https://asuswrt.lostrealm.ca/</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">** Download: https://sourceforge.net/projects/asuswrt-merlin/files/</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">**Source code: https://github.com/RMerl/asuswrt-merlin/</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">* For a Asuswrt-Merlin version that still supports RT-N66U</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">** see: [https://www.snbforums.com/threads/fork-asuswrt-merlin-374-43-lts-releases-v44ea.18914/ snbforums post] where the first entry keeps getting updated with the latest information.</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"></td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">TomatoUSB [http://tomato.groov.pl/ Shibby] also implemented a 64k NVRAM solution for 32K NVRAM CFE in 2012.</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"></td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">==Historical Build Information==</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">This is only potentially relevant if using builds from 2015 and earlier.</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">*If already running a custom 64K Build like Fractal or Kong with CFE 1.0.1.3, [ftp://ftp.dd-wrt.com/betas/2015/02-04-2015-r26138/broadcom_K3X/dd-wrt.v24-26138_NEWD-2_K3.x_mega-nv64k.bin 26138 mega nv64k] must be used to upgrade. Since K2.6 Builds have an embedded check, you need to use those special nvXXk trailed images. On K3.X this check has been removed and you can simply upgrade from a previous K3.X.</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">*With K3.X Broadcom builds, the CFE version is less concerning since DD-WRT detects it automatically to extend the 32KB limitation.</td><td colspan="2">&nbsp;</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">*Build 24461 BRICKS the RT-N66U, but recover is possible through the mini CFE web interface.</td><td colspan="2">&nbsp;</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">=Installation Instructions=</td><td> </td><td style="background: #eee; font-size: smaller;">=Installation Instructions=</td></tr> <tr><td colspan="2" align="left"><strong>Line 116:</strong></td> <td colspan="2" align="left"><strong>Line 53:</strong></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">* If using Older CFE (32K nvram) you can use K2.6</td><td> </td><td style="background: #eee; font-size: smaller;">* If using Older CFE (32K nvram) you can use K2.6</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">* Reset '''BEFORE''' and '''AFTER''' firmware upload. If upgrading from DD-WRT to a newer version of DD-WRT, then ''before'' is (mainly) optional.</td><td> </td><td style="background: #eee; font-size: smaller;">* Reset '''BEFORE''' and '''AFTER''' firmware upload. If upgrading from DD-WRT to a newer version of DD-WRT, then ''before'' is (mainly) optional.</td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;">* Refer to the [[Asus_RT-N66U#Notes|Notes]] section below if any of the following steps are confusing</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">=====Upload via Web GUI =====</td><td> </td><td style="background: #eee; font-size: smaller;">=====Upload via Web GUI =====</td></tr> <tr><td colspan="2" align="left"><strong>Line 164:</strong></td> <td colspan="2" align="left"><strong>Line 102:</strong></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">=Mods=</td><td> </td><td style="background: #eee; font-size: smaller;">=Mods=</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"><del style="color: red; font-weight: bold; text-decoration: none;">=</del>==Internal MicroSD card<del style="color: red; font-weight: bold; text-decoration: none;">=</del>==</td><td>+</td><td style="background: #cfc; font-size: smaller;">==Internal MicroSD card==</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">The N66U has an unused internal MicroSD card slot, but note that USB (and thus MMC) is not supported on K2.6 builds. However, it is working on K3.x builds. See [http://svn.dd-wrt.com/ticket/2580 SVN ticket]</td><td> </td><td style="background: #eee; font-size: smaller;">The N66U has an unused internal MicroSD card slot, but note that USB (and thus MMC) is not supported on K2.6 builds. However, it is working on K3.x builds. See [http://svn.dd-wrt.com/ticket/2580 SVN ticket]</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td colspan="2" align="left"><strong>Line 177:</strong></td> <td colspan="2" align="left"><strong>Line 115:</strong></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">For easier access, see below.</td><td> </td><td style="background: #eee; font-size: smaller;">For easier access, see below.</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"><del style="color: red; font-weight: bold; text-decoration: none;">=</del>==Case Top Mod<del style="color: red; font-weight: bold; text-decoration: none;">=</del>==</td><td>+</td><td style="background: #cfc; font-size: smaller;">==Case Top Mod==</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">Spacers (~1/4&quot; to 10mm) can be installed to elevate the case top, which allows easier access to the MicroSD card, and also improve cooling. A piece of dark foam and hole punch can be used to retain the top cover LED lighting.</td><td> </td><td style="background: #eee; font-size: smaller;">Spacers (~1/4&quot; to 10mm) can be installed to elevate the case top, which allows easier access to the MicroSD card, and also improve cooling. A piece of dark foam and hole punch can be used to retain the top cover LED lighting.</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"><del style="color: red; font-weight: bold; text-decoration: none;">=</del>==Overclocking<del style="color: red; font-weight: bold; text-decoration: none;">=</del>==</td><td>+</td><td style="background: #cfc; font-size: smaller;">==Overclocking==</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">Overclocking works since CFE 1.0.1.3, while underclocking worked prior to that. Overclocking may cause instability, or services (like QoS) to behave unpredictably</td><td> </td><td style="background: #eee; font-size: smaller;">Overclocking works since CFE 1.0.1.3, while underclocking worked prior to that. Overclocking may cause instability, or services (like QoS) to behave unpredictably</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">*Recommended to improve cooling or ventilation when overclocking, like the case top mod</td><td> </td><td style="background: #eee; font-size: smaller;">*Recommended to improve cooling or ventilation when overclocking, like the case top mod</td></tr> <tr><td colspan="2" align="left"><strong>Line 197:</strong></td> <td colspan="2" align="left"><strong>Line 135:</strong></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">=Notes=</td><td> </td><td style="background: #eee; font-size: smaller;">=Notes=</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">===<del style="color: red; font-weight: bold; text-decoration: none;">Performance</del>===</td><td>+</td><td style="background: #cfc; font-size: smaller;">==<ins style="color: red; font-weight: bold; text-decoration: none;">Reset button for Recovery</ins>==</td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">Pressing the Reset button (labeled like ' &gt; o &lt; ') at powerup will put the N66U into recovery mode. </ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">*Press and hold the reset button then plug in power until the power LED starts blinking. Access recovery mode at 192.168.1.1.</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;">&#160;</td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">==WPS button to Clear NVRAM==</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">Pressing the WPS button at powerup will reset (clear NVRAM) to default settings.</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">*Press and hold the WPS button while plugging in the power for about ten seconds. All the LEDs should flash, indicating settings have been reset to default settings.</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;">&#160;</td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">==NVRAM issue==</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">'''&lt;font color=&quot;red&quot;&gt;IMPORTANT: DO NOT USE K2.6 builds&lt;/font&gt; if using CFE v1.0.1.3 (64K nvram) or NEWER!!!'''&lt;br&gt;</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">At launch, the RT-N66U was limited to 32k nvram. However, CFE (bootloader) version 1.0.1.3 added 64k nvram support around April 2013, but was not compatible with DD-WRT firmware at that time. For details, see these forum links to historical nvram and 64K implemention discussions: [http://www.dd-wrt.com/phpBB2/viewtopic.php?t=86437&amp;postdays=0&amp;postorder=asc&amp;highlight=otrw+light&amp;start=1022 Fractal comments] and [http://www.dd-wrt.com/phpBB2/viewtopic.php?t=163479&amp;start=217 &quot;RT-N66 CFE Thread&quot;]</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;">&#160;</td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">This was resolved with DD-WRT K3X builds (kernel 3.x) which extended nvram to 64k, and can be used for any CFE version. It was eventually [https://www.dd-wrt.com/forum/viewtopic.php?p=1112621#1112621 extended to 256k].</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;">&#160;</td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">More historical info: http://charleswilkinson.co.uk/2012/12/22/dd-wrt-on-the-asus-rt-n66u-with-64k-cfe/</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;">&#160;</td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">'''For newer CFE version updates''' and procedures see here: [https://www.snbforums.com/threads/cfe-bootloader-update.8259/ SNB Forums]&lt;br&gt;</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;">&#160;</td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">Note: CFE can be thought of, as a bootloader for routers. The CFE is what loads the firmware when using ASUS Recovery Utility (and/or a TFTP tool)</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;">&#160;</td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">==CFE Version (or Update)==</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">[[Asus_RT-N66U#DD-WRT_Alternatives|AsusWRT-Merlin]] can be installed to enable telnet/ssh. telnet/ssh and then be used to check the CFE version. DD-WRT can then be flashed directly from Asuswrt-Merlin</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;">&#160;</td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">Find the CFE version:</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">*in telnet/ssh type: nvram get bl_version</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">*or look at the CFE partition. In telnet/ssh type: strings /dev/mtd0ro | grep bl_ver</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;">&#160;</td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;">&#160;</td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">ToDo: </ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">* link to Asus CFE sources </ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">* newest CFE version (as of July 2020) is 1.0.1.9</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">* how to update the CFE</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;">&#160;</td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">==K3.X Builds==</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">*Use RT-N66U.trx ''big'' or ''mega'' builds in the ''Broadcom_K3X'' folder. [https://forum.dd-wrt.com/phpBB2/viewtopic.php?p=1150414 Forum note] about the difference between ''mega'' and ''big''</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">*See [[Firmware_FAQ#Where_do_I_download_firmware.3F|Where do I download firmware]] for links and read forum build threads.</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;">&#160;</td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">Note: do NOT use build 40559 - 40559 is broken for most routers, despite being the recommended build for many routers in the Router Database. Search forum &quot;New build&quot; to get the latest updated info about builds (noted Aug 2020).</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;">&#160;</td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">==K2.6 Builds==</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">USB (and thus MMC) also does not work in K2.6 builds. USB devices cause a kernel panic: see [http://svn.dd-wrt.com/ticket/2580 SVN ticket]. Use a K3.x build (see above), which also works around the NVRAM issue.</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;">&#160;</td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">'''NOTE:''' All K2.6 builds between 43136 and 44112 are broken. [https://forum.dd-wrt.com/phpBB2/viewtopic.php?p=1213600#1212757 REF]</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;">&#160;</td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">== DD-WRT Alternatives ==</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">User Merlin implemented a solution in mid-2012 to extend the original 32k NVRAM CFE to ~60k NVRAM in firmware</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">* After 380.70 Asuswrt-Merlin stopped supporting RT-N66U. So earlier versions will still work (to enable SSH/Telnet)</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">** Homepage: https://asuswrt.lostrealm.ca/</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">** Download: https://sourceforge.net/projects/asuswrt-merlin/files/</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">**Source code: https://github.com/RMerl/asuswrt-merlin/</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">* For a Asuswrt-Merlin version that still supports RT-N66U</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">** see: [https://www.snbforums.com/threads/fork-asuswrt-merlin-374-43-lts-releases-v44ea.18914/ snbforums post] where the first entry keeps getting updated with the latest information.</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;">&#160;</td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">TomatoUSB [http://tomato.groov.pl/ Shibby] also implemented a 64k NVRAM solution for 32K NVRAM CFE in 2012.</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;">&#160;</td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">==Historical Build Information==</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">This is only potentially relevant if using builds from 2015 and earlier.</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">*If already running a custom 64K Build like Fractal or Kong with CFE 1.0.1.3, [ftp://ftp.dd-wrt.com/betas/2015/02-04-2015-r26138/broadcom_K3X/dd-wrt.v24-26138_NEWD-2_K3.x_mega-nv64k.bin 26138 mega nv64k] must be used to upgrade. Since K2.6 Builds have an embedded check, you need to use those special nvXXk trailed images. On K3.X this check has been removed and you can simply upgrade from a previous K3.X.</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">*With K3.X Broadcom builds, the CFE version is less concerning since DD-WRT detects it automatically to extend the 32KB limitation.</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">*Build 24461 BRICKS the RT-N66U, but recover is possible through the mini CFE web interface.</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;">&#160;</td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;"><ins style="color: red; font-weight: bold; text-decoration: none;">==Performance</ins>==</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">&lt;pre&gt;</td><td> </td><td style="background: #eee; font-size: smaller;">&lt;pre&gt;</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">Test Description RT-N66U</td><td> </td><td style="background: #eee; font-size: smaller;">Test Description RT-N66U</td></tr> <tr><td colspan="2" align="left"><strong>Line 208:</strong></td> <td colspan="2" align="left"><strong>Line 207:</strong></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">[http://www.smallnetbuilder.com/wireless/wireless-reviews/31687-asus-rt-n66u-dark-knight-dual-band-wireless-n900-gigabit-router-reviewed?start=2 Sources] and [http://www.smallnetbuilder.com/lanwan/lanwan-howto/31103-how-we-test-hardware-routers-revision-3 testing methods]</td><td> </td><td style="background: #eee; font-size: smaller;">[http://www.smallnetbuilder.com/wireless/wireless-reviews/31687-asus-rt-n66u-dark-knight-dual-band-wireless-n900-gigabit-router-reviewed?start=2 Sources] and [http://www.smallnetbuilder.com/lanwan/lanwan-howto/31103-how-we-test-hardware-routers-revision-3 testing methods]</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"><del style="color: red; font-weight: bold; text-decoration: none;">=</del>==LAN/WAN issue<del style="color: red; font-weight: bold; text-decoration: none;">=</del>==</td><td>+</td><td style="background: #cfc; font-size: smaller;">==LAN/WAN issue==</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">There should be no ''vlan0ports'' in nvram for the N66U switch: [https://www.dd-wrt.com/phpBB2/viewtopic.php?p=986347#986347] and [https://www.dd-wrt.com/phpBB2/viewtopic.php?p=936405#936405]&lt;br&gt;</td><td> </td><td style="background: #eee; font-size: smaller;">There should be no ''vlan0ports'' in nvram for the N66U switch: [https://www.dd-wrt.com/phpBB2/viewtopic.php?p=986347#986347] and [https://www.dd-wrt.com/phpBB2/viewtopic.php?p=936405#936405]&lt;br&gt;</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"><del style="color: red; font-weight: bold; text-decoration: none;">=</del>==Links<del style="color: red; font-weight: bold; text-decoration: none;">=</del>==</td><td>+</td><td style="background: #cfc; font-size: smaller;">==Links==</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">Primary forum threads</td><td> </td><td style="background: #eee; font-size: smaller;">Primary forum threads</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">* [http://www.dd-wrt.com/phpBB2/viewtopic.php?t=171783 One User's Guide] - A users guide for flashing RT-N66U</td><td> </td><td style="background: #eee; font-size: smaller;">* [http://www.dd-wrt.com/phpBB2/viewtopic.php?t=171783 One User's Guide] - A users guide for flashing RT-N66U</td></tr> </table> Kernel-panic69 http://wiki.dd-wrt.com/wiki/index.php?title=Asus_RT-N66U&diff=56085&oldid=prev Kernel-panic69: /* Hardware [http://en.techinfodepot.shoutwiki.com/wiki/ASUS_RT-N66U Specifications] */ 2021-10-15T13:58:53Z <p><span class="autocomment">Hardware [http://en.techinfodepot.shoutwiki.com/wiki/ASUS_RT-N66U Specifications]</span></p> <table border='0' width='98%' cellpadding='0' cellspacing='4' style="background-color: white;"> <tr> <td colspan='2' width='50%' align='center' style="background-color: white;">←Older revision</td> <td colspan='2' width='50%' align='center' style="background-color: white;">Revision as of 13:58, 15 October 2021</td> </tr> <tr><td colspan="2" align="left"><strong>Line 43:</strong></td> <td colspan="2" align="left"><strong>Line 43:</strong></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">|}</td><td> </td><td style="background: #eee; font-size: smaller;">|}</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">===Reset button for Recovery<del style="color: red; font-weight: bold; text-decoration: none;">=</del>==</td><td>+</td><td style="background: #cfc; font-size: smaller;">=<ins style="color: red; font-weight: bold; text-decoration: none;">Prerequisite Information=</ins></td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;">&#160;</td></tr> <tr><td colspan="2">&nbsp;</td><td>+</td><td style="background: #cfc; font-size: smaller;">==Reset button for Recovery==</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">Pressing the Reset button (labeled like ' &gt; o &lt; ') at powerup will put the N66U into recovery mode. </td><td> </td><td style="background: #eee; font-size: smaller;">Pressing the Reset button (labeled like ' &gt; o &lt; ') at powerup will put the N66U into recovery mode. </td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">*Press and hold the reset button then plug in power until the power LED starts blinking. Access recovery mode at 192.168.1.1.</td><td> </td><td style="background: #eee; font-size: smaller;">*Press and hold the reset button then plug in power until the power LED starts blinking. Access recovery mode at 192.168.1.1.</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"><del style="color: red; font-weight: bold; text-decoration: none;">=</del>==WPS button to Clear NVRAM<del style="color: red; font-weight: bold; text-decoration: none;">=</del>==</td><td>+</td><td style="background: #cfc; font-size: smaller;">==WPS button to Clear NVRAM==</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">Pressing the WPS button at powerup will reset (clear NVRAM) to default settings.</td><td> </td><td style="background: #eee; font-size: smaller;">Pressing the WPS button at powerup will reset (clear NVRAM) to default settings.</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">*Press and hold the WPS button while plugging in the power for about ten seconds. All the LEDs should flash, indicating settings have been reset to default settings.</td><td> </td><td style="background: #eee; font-size: smaller;">*Press and hold the WPS button while plugging in the power for about ten seconds. All the LEDs should flash, indicating settings have been reset to default settings.</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"><del style="color: red; font-weight: bold; text-decoration: none;">=</del>==NVRAM issue<del style="color: red; font-weight: bold; text-decoration: none;">=</del>==</td><td>+</td><td style="background: #cfc; font-size: smaller;">==NVRAM issue==</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">'''&lt;font color=&quot;red&quot;&gt;IMPORTANT: DO NOT USE K2.6 builds&lt;/font&gt; if using CFE v1.0.1.3 (64K nvram) or NEWER!!!'''&lt;br&gt;</td><td> </td><td style="background: #eee; font-size: smaller;">'''&lt;font color=&quot;red&quot;&gt;IMPORTANT: DO NOT USE K2.6 builds&lt;/font&gt; if using CFE v1.0.1.3 (64K nvram) or NEWER!!!'''&lt;br&gt;</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">At launch, the RT-N66U was limited to 32k nvram. However, CFE (bootloader) version 1.0.1.3 added 64k nvram support around April 2013, but was not compatible with DD-WRT firmware at that time. For details, see these forum links to historical nvram and 64K implemention discussions: [http://www.dd-wrt.com/phpBB2/viewtopic.php?t=86437&amp;postdays=0&amp;postorder=asc&amp;highlight=otrw+light&amp;start=1022 Fractal comments] and [http://www.dd-wrt.com/phpBB2/viewtopic.php?t=163479&amp;start=217 &quot;RT-N66 CFE Thread&quot;]</td><td> </td><td style="background: #eee; font-size: smaller;">At launch, the RT-N66U was limited to 32k nvram. However, CFE (bootloader) version 1.0.1.3 added 64k nvram support around April 2013, but was not compatible with DD-WRT firmware at that time. For details, see these forum links to historical nvram and 64K implemention discussions: [http://www.dd-wrt.com/phpBB2/viewtopic.php?t=86437&amp;postdays=0&amp;postorder=asc&amp;highlight=otrw+light&amp;start=1022 Fractal comments] and [http://www.dd-wrt.com/phpBB2/viewtopic.php?t=163479&amp;start=217 &quot;RT-N66 CFE Thread&quot;]</td></tr> <tr><td colspan="2" align="left"><strong>Line 63:</strong></td> <td colspan="2" align="left"><strong>Line 65:</strong></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">Note: CFE can be thought of, as a bootloader for routers. The CFE is what loads the firmware when using ASUS Recovery Utility (and/or a TFTP tool)</td><td> </td><td style="background: #eee; font-size: smaller;">Note: CFE can be thought of, as a bootloader for routers. The CFE is what loads the firmware when using ASUS Recovery Utility (and/or a TFTP tool)</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"><del style="color: red; font-weight: bold; text-decoration: none;">===</del>==CFE Version (or Update)<del style="color: red; font-weight: bold; text-decoration: none;">===</del>==</td><td>+</td><td style="background: #cfc; font-size: smaller;">==CFE Version (or Update)==</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">[[Asus_RT-N66U#DD-WRT_Alternatives|AsusWRT-Merlin]] can be installed to enable telnet/ssh. telnet/ssh and then be used to check the CFE version. DD-WRT can then be flashed directly from Asuswrt-Merlin</td><td> </td><td style="background: #eee; font-size: smaller;">[[Asus_RT-N66U#DD-WRT_Alternatives|AsusWRT-Merlin]] can be installed to enable telnet/ssh. telnet/ssh and then be used to check the CFE version. DD-WRT can then be flashed directly from Asuswrt-Merlin</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td colspan="2" align="left"><strong>Line 73:</strong></td> <td colspan="2" align="left"><strong>Line 75:</strong></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">ToDo: </td><td> </td><td style="background: #eee; font-size: smaller;">ToDo: </td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">* link to Asus CFE sources </td><td> </td><td style="background: #eee; font-size: smaller;">* link to Asus CFE sources </td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;">* determine if updating to latest official Asus Firmware will also update to newest CFE version </td><td colspan="2">&nbsp;</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">* newest CFE version (as of July 2020) is 1.0.1.9</td><td> </td><td style="background: #eee; font-size: smaller;">* newest CFE version (as of July 2020) is 1.0.1.9</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">* how to update the CFE</td><td> </td><td style="background: #eee; font-size: smaller;">* how to update the CFE</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"><del style="color: red; font-weight: bold; text-decoration: none;">=</del>==K3.X Builds<del style="color: red; font-weight: bold; text-decoration: none;">=</del>==</td><td>+</td><td style="background: #cfc; font-size: smaller;">==K3.X Builds==</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">*Use RT-N66U.trx ''big'' or ''mega'' builds in the ''Broadcom_K3X'' folder. [https://forum.dd-wrt.com/phpBB2/viewtopic.php?p=1150414 Forum note] about the difference between ''mega'' and ''big''</td><td> </td><td style="background: #eee; font-size: smaller;">*Use RT-N66U.trx ''big'' or ''mega'' builds in the ''Broadcom_K3X'' folder. [https://forum.dd-wrt.com/phpBB2/viewtopic.php?p=1150414 Forum note] about the difference between ''mega'' and ''big''</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">*See [[Firmware_FAQ#Where_do_I_download_firmware.3F|Where do I download firmware]] for links and read forum build threads.</td><td> </td><td style="background: #eee; font-size: smaller;">*See [[Firmware_FAQ#Where_do_I_download_firmware.3F|Where do I download firmware]] for links and read forum build threads.</td></tr> <tr><td colspan="2" align="left"><strong>Line 83:</strong></td> <td colspan="2" align="left"><strong>Line 84:</strong></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">Note: do NOT use build 40559 - 40559 is broken for most routers, despite being the recommended build for many routers in the Router Database. Search forum &quot;New build&quot; to get the latest updated info about builds (noted Aug 2020).</td><td> </td><td style="background: #eee; font-size: smaller;">Note: do NOT use build 40559 - 40559 is broken for most routers, despite being the recommended build for many routers in the Router Database. Search forum &quot;New build&quot; to get the latest updated info about builds (noted Aug 2020).</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"><del style="color: red; font-weight: bold; text-decoration: none;">=</del>==K2.6 Builds<del style="color: red; font-weight: bold; text-decoration: none;">=</del>==</td><td>+</td><td style="background: #cfc; font-size: smaller;">==K2.6 Builds==</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">USB (and thus MMC) also does not work in K2.6 builds. USB devices cause a kernel panic: see [http://svn.dd-wrt.com/ticket/2580 SVN ticket]. Use a K3.x build (see above), which also works around the NVRAM issue.</td><td> </td><td style="background: #eee; font-size: smaller;">USB (and thus MMC) also does not work in K2.6 builds. USB devices cause a kernel panic: see [http://svn.dd-wrt.com/ticket/2580 SVN ticket]. Use a K3.x build (see above), which also works around the NVRAM issue.</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">'''NOTE:''' All K2.6 builds between 43136 and 44112 are broken. [https://forum.dd-wrt.com/phpBB2/viewtopic.php?p=1213600#1212757 REF]</td><td> </td><td style="background: #eee; font-size: smaller;">'''NOTE:''' All K2.6 builds between 43136 and 44112 are broken. [https://forum.dd-wrt.com/phpBB2/viewtopic.php?p=1213600#1212757 REF]</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"><del style="color: red; font-weight: bold; text-decoration: none;">=</del>== DD-WRT Alternatives <del style="color: red; font-weight: bold; text-decoration: none;">=</del>==</td><td>+</td><td style="background: #cfc; font-size: smaller;">== DD-WRT Alternatives ==</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">User Merlin implemented a solution in mid-2012 to extend the original 32k NVRAM CFE to ~60k NVRAM in firmware</td><td> </td><td style="background: #eee; font-size: smaller;">User Merlin implemented a solution in mid-2012 to extend the original 32k NVRAM CFE to ~60k NVRAM in firmware</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">* After 380.70 Asuswrt-Merlin stopped supporting RT-N66U. So earlier versions will still work (to enable SSH/Telnet)</td><td> </td><td style="background: #eee; font-size: smaller;">* After 380.70 Asuswrt-Merlin stopped supporting RT-N66U. So earlier versions will still work (to enable SSH/Telnet)</td></tr> <tr><td colspan="2" align="left"><strong>Line 99:</strong></td> <td colspan="2" align="left"><strong>Line 100:</strong></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">TomatoUSB [http://tomato.groov.pl/ Shibby] also implemented a 64k NVRAM solution for 32K NVRAM CFE in 2012.</td><td> </td><td style="background: #eee; font-size: smaller;">TomatoUSB [http://tomato.groov.pl/ Shibby] also implemented a 64k NVRAM solution for 32K NVRAM CFE in 2012.</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"><del style="color: red; font-weight: bold; text-decoration: none;">=</del>==Historical Build Information<del style="color: red; font-weight: bold; text-decoration: none;">=</del>==</td><td>+</td><td style="background: #cfc; font-size: smaller;">==Historical Build Information==</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">This is only potentially relevant if using builds from 2015 and earlier.</td><td> </td><td style="background: #eee; font-size: smaller;">This is only potentially relevant if using builds from 2015 and earlier.</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">*If already running a custom 64K Build like Fractal or Kong with CFE 1.0.1.3, [ftp://ftp.dd-wrt.com/betas/2015/02-04-2015-r26138/broadcom_K3X/dd-wrt.v24-26138_NEWD-2_K3.x_mega-nv64k.bin 26138 mega nv64k] must be used to upgrade. Since K2.6 Builds have an embedded check, you need to use those special nvXXk trailed images. On K3.X this check has been removed and you can simply upgrade from a previous K3.X.</td><td> </td><td style="background: #eee; font-size: smaller;">*If already running a custom 64K Build like Fractal or Kong with CFE 1.0.1.3, [ftp://ftp.dd-wrt.com/betas/2015/02-04-2015-r26138/broadcom_K3X/dd-wrt.v24-26138_NEWD-2_K3.x_mega-nv64k.bin 26138 mega nv64k] must be used to upgrade. Since K2.6 Builds have an embedded check, you need to use those special nvXXk trailed images. On K3.X this check has been removed and you can simply upgrade from a previous K3.X.</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">*With K3.X Broadcom builds, the CFE version is less concerning since DD-WRT detects it automatically to extend the 32KB limitation.</td><td> </td><td style="background: #eee; font-size: smaller;">*With K3.X Broadcom builds, the CFE version is less concerning since DD-WRT detects it automatically to extend the 32KB limitation.</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">*Build 24461 BRICKS the RT-N66U, but recover is possible through the mini CFE web interface.</td><td> </td><td style="background: #eee; font-size: smaller;">*Build 24461 BRICKS the RT-N66U, but recover is possible through the mini CFE web interface.</td></tr> <tr><td>-</td><td style="background: #ffa; font-size: smaller;"></td><td colspan="2">&nbsp;</td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;"></td><td> </td><td style="background: #eee; font-size: smaller;"></td></tr> <tr><td> </td><td style="background: #eee; font-size: smaller;">=Installation Instructions=</td><td> </td><td style="background: #eee; font-size: smaller;">=Installation Instructions=</td></tr> </table> Kernel-panic69