Cisco Valet Plus M20

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bgn (N300)
802.11b/g/n Gigabit Wireless HotSpot Router
Cisco Valet Plus M20.jpg
Support
Wikipedia
InfoDepot Wiki
3rd Party Firmware
dd-wrt
OpenWrt
Incompatible
Tomato any flavor
Gargoyle
Status Unknown
Platform
BrandModelRev
Cisco M20
Serial number prefix
CVJ0
FCC ID
IC ID
Type
wireless router
CPU1
Broadcom BCM4716B0
CPU1 Type
MIPS 74K
CPU1 Speed
300 MHz
Flash1 Chip
Brand? Model?
Flash1 Size
4 MiB4,194,304 B <br />32,768 Kib <br />4,096 KiB <br />32 Mib <br />0.00391 GiB <br /> (Serial)
RAM1 Size
32 MiB33,554,432 B <br />262,144 Kib <br />32,768 KiB <br />256 Mib <br />0.0313 GiB <br />
RAM1 Chip
SK hynix HY5DU561622FTP-D43
ETH chip1
Broadcom BCM4716B0
Switch
Broadcom BCM53115
Ethernet Port Count
1-1GbE-WAN
4-1GbE-LAN
Wired Standard
IEEE 802.3/3u/3ab

802dot11 OUI: 68:7F:74 (13 E, 16 W)
Ethernet OUI: 68:7F:74 (13 E, 16 W)

Expansion IF types
none specified
Power
12 VDC, 1 A
Connector type
barrel
Serial Port (UART)
yes
JTAG Port
yes
Other

Default SSID: CiscoXXXXX (6 addl. devices)
Default IP address: 192.168.1.1
the IP 192.168.1.1 is used by 1311 additional devices
of which 18 are Cisco devices
Default login user: admin
Default login password: admin
admin:admin credentials used by 1332 additional devices
of which 13 are Cisco devices

Manuf/OEM/ODM
3rd Party Firmware Support
DD-WRT • (List)
, TomatoUSB • (List | DLs)
Retail
Availability common
FCC approval date 25 January 2010
(Est.) release date 31 March 2010
UPC 745883589388
(UPC DB, On eBay)
Newegg N82E16833186011
ASIN B003B4AVSS Flag of the United States.svg
Country of manuf China
Physical
Dimensions
7.95" x 6.30" x 1.34"
Radio 1
Chip1
Broadcom BCM4716B0
Wireless interface OUI
68:7F:74
Antenna Connector Type
Internal
MIMO status
2x2:2
Wireless Standard
IEEE 802.11b/g/n
802.11n
up to 300 Mbps
802.11g
up to 54 Mbps
802.11b
up to 11 Mbps
WiFi Operating Frequency
2.4 GHz
Radio cor_rev
17

For a list of all currently documented Broadcom chipsets with specifications, see Broadcom.

For a list of all currently documented Cisco device with specifications, see Cisco.

300 Mbps - 2SS 2.4GHz 802.11n (40MHz chan.) = N300 class

Overview

The M20 shares the same hardware as the Linksys WRT310N v2.

To get HT40 support in the 17804 build, telnet into the router and run the following commands..

nvram set wl0_nbw_cap=1
nvram set wl1_nbw_cap=1
nvram commit
reboot

While the device is not listed on the support list, it works with TomatoUSB (K2.6 NoUSB-STD) as of 10/13/2011.

"3763-02010206R" is silkscreened on the board in the FCC photos.

M20 serial numbers appear to start with CVK0.

The default SSID is CiscoXXXXX where XXXXX is the last 5 digits of the serial number. If the device has been configured with Cisco Connect the device will probably have a randomly generated SSID. A sample serial number is CVK01K427671

The included power adapter is a Bestec EA0121WAA.

Links of Interest

Cisco Valet Routers on Wikipedia
On the DD-WRT wiki (listed as a WiP)
On thread of many on the DD-WRT forums, pointing to Eko's recent builds as supporting the M20, as of 09/08/2011 the latest build is 17804

Flashing

Flashing dd-wrt

Supported by dd-wrt as of = svn14471 WIP

Please insert instructions here

Flashing Tomato

Please insert instructions here

Upgrading

Updating DD-WRT

If dd-wrt is already on the router follow these instructions. If stock firmware is on the router follow the flashing instructions.

  1. Check for recommended builds here first.
  2. Set your computer to a static IP of 192.168.1.7. (or to whatever subnet the router is on) Disable all firewalls and security. Disable wireless on your computer and only have the router connected to the flashing computer by the ethernet cable between the two.
  3. Hard reset or 30/30/30 (If the router supports it, if not, reset to defults in the GUI) prior to flashing. Wait. Check for password page on re-login and change password.
  4. Flash firmware. You can use the webgui except if you have a belkin router. (For belkin use tftp.exe to flash)
  5. Wait...at least three minutes. Lights should return to normal. See important2, below. Failing to wait is how most people brick their routers.
  6. Do a power cycle of the router. (Unplug the cord, count to 30 and plug it back in.)
  7. Wait for the lights to return to normal usually about 2 minutes.
  8. Hard reset or 30/30/30 again (If the router supports it, if not, reset to defults in the GUI). Wait. Check for the password page and re-login to change the password. Then you can reconfigure your settings manually.
  9. Once configured set your computer back to autoIP and autoDNS.

Important1: This Hard reset or 30/30/30 works fine for Asus router, but you do have to power cycle after the reset.

Important2: After you flash the firmware, and before you do the hard reset, the router will be building some nvram settings. YOU MUST WAIT FOR THIS TO FINISH PRIOR TO DOING ANYTHING WITH THE ROUTER INCLUDING A HARD RESET. Usually, you can tell when this process is completed by the WAN light coming on, but it does take several minutes. Go have a beer. There are starting to be more and more people who BRICK their routers by not waiting until the nvram is rebuilt, PRIOR to doing a hard reset. YOU NEED TO WAIT!

Reverting

JTAG-Serial Info

Serial

Serial Pinouts

VCC  1 o
 TX  2 o
 RX  3 o
N/C  4 o
GND  5 o

Pictures

FCCID Q87-M20