Chuck,
You are not crazy. ;-) I have seen this with IOS 12.0, and it totally
confounded me the first time I saw it. It seems to happen when the serial
interfaces are configured and brought up BEFORE the cables are attached.
Save your config, then power cycle the boxes.
HTH,
Pamela
On Tue, 13 Jun 2000, Chuck Larrieu wrote:
> Now that it appears I can post again, let me try this again. Discovered the
> problem Saturday. Have not been able to ask for help.
>
> Got a good one for you all to ponder.
>
> I am in the process of reassembling my lab. Routers have been off line for a
> couple of weeks. Friday I brought two back on line to test some
> configurations for someone. Discovered that I was unable to route.
>
> Here is what I know:
>
> Serial interfaces on both routers are up. I know this because:
>
> 1) Show CDP neighbor reveals the other router, both interfaces, both routers
> 2) Debug serial interface and debug serial events shows communication across
> the interfaces
> 3) Show interface reveals the interface is up and the protocol is up, both
> interfaces, both routers
> 4) On either router I can ping the directly connected interfaces of the
> other router
> 5) Oh, and IPX and AppleTalk routing work just fine. I see all networks for
> both protocols.
>
> I also know that the routing protocols are set up correctly. Honest, gang.
> I'm not sure how many more ways I can check an IGRP configuration with one
> network in it. Let alone EIGRP and BGP ( the lab configuration I was
> testing ) Besides, as I stated, I can ping the each router serial interface
> from the other router.
>
> I also found that one time, if I reloaded with an empty startup config, and
> configured from the setup, that I would have routing. Admittedly I have not
> done too many more experiments along this line.
>
> Oh, one last thing. IP routing works fine and dandy across the ethernet
> interfaces. I.e if I plug both router ethernets into the same hub, routing
> is great. Even the BGP processes establish neighbor relationships with the
> right information..
>
> Well, I'm frustrated as hell. And out of ideas. I have gone so far as to
> reload images into the routers. The only other thing that is a wild guess is
> that two of the three routers were the recipients of new images via Cisco's
> Router Software Loader. But the other one was updated the old fashioned
> way - TFTP. Makes no sense to me that this would effect the ability of the
> IOS to see the serial ports. I suppose strange things have happened.
>
> I do find it rather incredible that every serial interface on every single
> one of my routers has failed at exactly the same time. And failed for IP
> only.
>
> Anyone have any ideas? Is there some secret command within IOS version 12.x
> that someone is keeping secret from me? I continue to search on CCO, but CCO
> is hiding this secret well.
>
> Chuck
>
>
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