From: ccie2be (ccie2be@nyc.rr.com)
Date: Sun Oct 24 2004 - 12:02:14 GMT-3
Have you rebooted all 3 routers?
1 other thing I would check given the "lenght invalid" in the error message
is the hello padding command.
HTH, Tim
----- Original Message -----
From: "John Wong" <johnwk@unimelb.edu.au>
To: "Groupstudy - CCIE Lab" <ccielab@groupstudy.com>
Sent: Sunday, October 24, 2004 10:17 AM
Subject: Strange IS-IS adjacency problem
> 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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