From: Rick Burts (burts@xxxxxxxxxxxxxx)
Date: Thu Jan 25 2001 - 13:19:06 GMT-3
Are you sure that CDP sees neighbors at both ends.
Could you send output of show cdp neighbor detail for both.
I am especially interested in what cdp sees at R1.
The symptoms kind of sound like a problem with the receive
pair at R1.
Rick
Rick Burts, CCSI CCIE 4615 burts@mentortech.com
Mentor Technologies 240-568-6500 ext 6652
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On Mon, 22 Jan 2001, Nodir Nazarov wrote:
>
> Hello, I need help in supposedly simplest configuration.
>
> I have 2 sites connected via T1.
>
>
> R1<------------------>R2,
> 192.168.1.2 192.168.1.1
>
> Where R1 has T1 and R2 has T1 channel in DS3. R1 - c2620. R2 - 7206vxr.I
> have been doing similar scenario many many times and had no problem. This
> time however I see both serials up/up but I can't ping. When I ping from
> R2 to R1 this is what I got on R2:
>
> 15w3d: IP: s=192.168.1.1 (local), d=192.168.1.2 (Serial1/0/8:0), len 100,
> sending.
> 15w3d: IP: s=192.168.1.1 (local), d=192.168.1.2 (Serial1/0/8:0), len 100,
> sending.
> 15w3d: IP: s=192.168.1.1 (local), d=192.168.1.2 (Serial1/0/8:0), len 100,
> sending.
>
> When I ask to ping from R1 to R2 I see on R2:
>
>
> 15w3d: IP: s=192.168.1.2 (Serial1/0/8:0), d=192.168.1.1 (Serial1/0/8:0),
> len 100, rcvd 3
> 15w3d: IP: s=192.168.1.1 (local), d=192.168.1.2 (Serial1/0/8:0), len 100,
> sending
> 15w3d: IP: s=192.168.1.2 (Serial1/0/8:0), d=192.168.1.1 (Serial1/0/8:0),
> len 100, rcvd 3
> 15w3d: IP: s=192.168.1.1 (local), d=192.168.1.2 (Serial1/0/8:0), len 100,
> sending
>
> But no success. On both interfaces - no errors at all. I can see the
> routers through cdp. Encapsulation on both ends - hdlc. No access lists at
> all, vanilla configuration.
>
> I know you will ask details about the other end, but all it has is:
>
> int se 0/0
> ip address 192.168.1.2 255.255.255.0
>
> I am afraid to get something like this on the lab. Aren't you ??
>
> Nodir
>
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