From: Swaroop Potdar (swarooppotdar@hotmail.com)
Date: Sun Oct 24 2004 - 14:38:22 GMT-3
Hi,
Can u pls paste the output of "sh ip interface" from you three routers
&
and "debug fram pac" from the routers not forming adjacencies.
Thanks,
Swaroop
>From: John Wong <johnwk@unimelb.edu.au>
>Reply-To: John Wong <johnwk@unimelb.edu.au>
>To: Groupstudy - CCIE Lab <ccielab@groupstudy.com>
>Subject: Strange IS-IS adjacency problem
>Date: Mon, 25 Oct 2004 00:17:40 +1000
>
>Hi all,
>
>Need help from you Gurus on a strange IS-IS problem I am encountering
>at the moment. Any help is much appreciated.
>
>I am getting the below message on a hub router in a FR network
>configured to run IS-IS :-
>
>Oct 24 21:19:13 SGT: %CLNS-3-BADPACKET: ISIS: LAN L2 hello, packet (1500)
>or wire (988) length invalid from DLCI 703 (Serial0/2.1)
>
>The adjacency is stuck at the Init stage in R3 (spoke) and not appearing
>at all in R7 (hub).
>
>Strange thing is that I have 2 identically configured routers (R1 & R3)
>as the spokes and the hub router (R7) can establish adjacency with one of
>them (R1) but not the other (R3). Both R1 & R3 are of the same hardware
>platform and runs the same version of IOS image.
>
>Relevant configuration as below :-
>
>!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
>!
>hostname R1
>!
>interface Serial0
>no ip address
>encapsulation frame-relay
>no frame-relay inverse-arp
>!
>interface Serial0.1 multipoint
>ip address 192.168.1.1 255.255.255.0
>ip router isis frame-relay map clns 107 broadcast
>frame-relay map ip 192.168.1.3 107 broadcast
>frame-relay map ip 192.168.1.7 107 broadcast
>!
>router isis net 47.0200.0102.5500.0001.00
>
>!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
>!
>hostname R3
>!
>interface Serial0
>no ip address
>encapsulation frame-relay
>no frame-relay inverse-arp
>!
>interface Serial0.1 multipoint
>ip address 192.168.1.3 255.255.255.0
>ip router isis frame-relay map clns 307 broadcast
>frame-relay map ip 192.168.1.1 307 broadcast
>frame-relay map ip 192.168.1.7 307 broadcast
>!
>router isis net 47.0000.0102.5500.0003.00
>
>!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
>!
>hostname R7
>!
>interface Serial0/2
>no ip address
>encapsulation frame-relay
>no frame-relay inverse-arp
>!
>interface Serial0/2.1 multipoint
>ip address 192.168.1.7 255.255.255.0
>ip router isis isis priority 120
>frame-relay map clns 703 broadcast
>frame-relay map clns 701 broadcast
>frame-relay map ip 192.168.1.1 701 broadcast
>frame-relay map ip 192.168.1.3 703 broadcast
>!
>router isis net 47.0100.0102.5500.0007.00
>
>!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
>
>R1#sh clns neigh
>System Id Interface SNPA State Holdtime Type
>Protocol
>R7 Se0.1 DLCI 107 Up 7 L2 IS-IS
>
>!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
>
>R3# sh clns neigh
>System Id Interface SNPA State Holdtime Type
>Protocol
>0102.5500.0007 Se0 DLCI 307 Init 9 L2 IS-IS
>
>!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
>
>R7#sh clns neighbors System Id Interface SNPA State
>Holdtime Type Protocol
>R1 Se0/2.1 DLCI 701 Up 24 L2 IS-IS
>
>_______________________________________________________________________
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Regards,
Swaroop.
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