Useful Cisco Commands

show ip traffic

show tcp

show ip dhcp bindings

show interface atm 0

show interface dot11

Disable Driver Signature Enforcement - Cisco PI21AG

I've got a Cisco PI21AG WiFi PCI NIC card for my media box PC. Cisco don't supply a driver for the 64bit Windows 7 in the final release version. However there was a Microsoft driver in the W7 beta which worked perfectly (but taken out in RC and RTM versions of W7). After installing the release version of W7-64 I just installed the driver that had come with the Beta.

Problem is the "driver signature enforcement" is invalid so the driver won't load. Although this can be disabled by pressing F8 each time the PC boots and selecting the "disable enforcement" option, this is tedious so I Googled and tried this:

1. Run command prompt as administrator.
2. bcdedit -set loadoptions DDISABLE_INTEGRITY_CHECKS

This did NOT WORK. Apparently it does work on some versions of Vista, but who cares Vista is a waste of time.

Seemed dodgy, but I then tried this:

http://www.ngohq.com/home.php?page=dseo

Basically its a case of switching the OS to a driver developer "test mode" and then applying a sort of "self signing" to the driver in question. So by going into Device Manager and selecting the device, properties, driver tab, driver details - I can see it is athrx.sys which is not signed.

So using the app I applied both these steps and rebooted. Worked great - No more F8 and I can keep using my expensive bulletproof Cisco Wifi NIC on the Media Box PC.

Cisco 877W Factory Reset Password Recovery

Bought a Cisco 877W off eBay, as a reliable router / access point for home. It came configured as a "The Cloud" free WiFi Hotspot.

If you need to do a "factory reset" on one of these you can.

1. Connect to the console using serial cable.
2. Switch on while hitting [FN-CTRL-BREAK]- (I have a Thinkpad, [FN] not needed on a desktop keyboard). Tricky, may take a few attempts - need to be hitting it really early on in the boot process.
3. Get rommon> prompt. [http://www.roadkillnetworks.com/cisco/tftp_rom_monitor_appendc.htm]
4. >confreg, >yes, >no to everything except "ignore system config info".
5. >reset

It will then reboot from an alternate configuration file, and you're in! Now however, to clear the existing setup and revert the router to a good state.

1. Router>enable
2. Router#conf t
3. Router(config)config-register 0x2102
4. Router(config)exit
5. Router>write memory
6. Router>reload

Useful guide:

• http://www.petri.co.il/forums/showthread.php?t=9328
• http://www.cisco.com/en/US/products/sw/iosswrel/ps5187/products_tech_note09186a00802017a1.shtml