Linksys EA6900
From DD-WRT Wiki
Contents |
Hardware Specifications
The XAC1900, which comes as part of a kit with a separate DSL modem (APM105), appears to be the same device as a user has flashed one to the EA6900 firmware.
FCC ID | Q87-EA6900 |
---|---|
Industry Canada ID | 3839A-EA6900 |
Power | 12 VDC, 3.5 A |
CPU | Broadcom BCM4708A0 |
CPU Speed | 800 MHz (2 cores) |
Flash/RAM | 128 MiB / 256 MiB |
WI1 chip | Broadcom BCM4360 |
WI1 protocols | an+ac |
WI1 MIMO config | 3x3:3 |
WI2 chip | Broadcom BCM4360 |
WI2 protocols | bgn |
WI2 MIMO config | 3x3:3 |
Antenna connectors | U.FL, RP-SMA |
Switch | Broadcom BCM4708A0 |
LAN / WAN ports | 4 / 1 (up to 1 Gb/s) |
USB ports | 2 (USB 3.0, USB 2.0) |
Serial | 6-pin header, internal |
Installation
Please refer to this forum thread for the latest info: "Linksys EA 6900 Install Guide"
Boot Partitions
The Linksys CFE partitions flash with two linux boot partitions, switching between them after three (consecutive?) incomplete or failed boots. It also has a bug that limits NVRAM to 32KB, for which a third-party XVortex CFE (ported from an Asus RT-AC68U) is available to mitigate. The XVortex CFE only uses a single linux boot partition.
To check the boot partitions, run this from telnet or ssh:
cat /proc/mtd
The main boot partition is 'linux' and the Linksys CFE will also have 'linux2'.
To force switching to the other partition from current, unplug the router after ~10 seconds into boot. After the third try, it will switch the 'bootpartition' which is stored in nvram. It can also be manually altered:
nvram get bootpartition
This returns the current boot partition (0 for linux, or 1 for linux2). To change the boot e.g. to 1:
nvram set bootpartition=1
The number of partial boots to switch linux partitions is controlled by maxpartialboots (default is 3):
nvram get maxpartialboots
And can be changed with 'set' as well. The current number of incomplete boots is tracked with 'partialboots':
nvram get partialboots
The partitions can be directly written to 'linux' (or use 'linux2' for that partition) from command prompt:
wget {firmware path}
Or enable SSH and then WinSCP (or similar) can be used to copy the file.
mtd unlock linux mtd write {firmware file} linux reboot
Note: if an error returns from the mtd commands, instead try 'write {firmware file} linux' (no mtd command)
Links
DD-WRT Firmware_FAQ