Open a case with the Cisco TAC. Since your 2811 is probably pretty new, you shouldn't even need a service contract (yet). They'll send you replacement WICs and test to figure out why your current ones failed.

So far, with the new 2811s, I have seen an instance where one customer bought a mix of six 2811 and 2821 routers, and six WIC-1DSU-T1-V2s, only to find that three out of the six V2 WICs DID NOT WORK. The broken three ONLY worked in slot 0, and often times the T1s did not work properly even in that instance (it would go down and a reload was the only way to bring it back up).

The good three WICs worked fine, in any slot. The kicker is that the six WICs had _SEQUENTIAL_ serial numbers, so for half of them to be "bad" in the 2811s was definitely not expected. They seemed to work fine in 3600 and other older routers.

Same customer, same routers, they also had a problem with a 2811 that is even more worrisome. One 2811, on a particular T1, would not stay up, "Line protocol is down", unless you set hdlc keepalive to 13 or something else odd. Plug in a 2500 with external CSU or 2600 with a WIC and the T1 works just fine with completely default settings. Ironically, other 2811s work fine at this location with default settings. All 2811s had the same IOS images (not that there is much choice for these new boxes)

Yep, there are strange issues with these new boxes. Given Cisco's marketing push, I would imagine most early adopters are using them primarily in voice applications and not data T1s. Perhaps they were better debugged there.

All I have left is to say "Way to go Cisco!!" for the broken T1 technology - I know it's highly complicated, delicate, top precision work, and that the utmost time and care goes into testing such obvious configurations...err..uhh.. wait a minute, what was I saying ???

Jay Hennigan [jay at west.net] wrote: