From: Tony Schaffran (groupstudy@cconlinelabs.com)
Date: Sun Oct 24 2004 - 11:24:01 GMT-3
You might want to re-check your frame relay DLCI's.
They do not look quite right between R1 & R3
Tony Schaffran
Network Analyst
CCIE #11071
CCNP, CCNA, CCDA,
NNCDS, NNCSS, CNE, MCSE
www.cconlinelabs.com
Your #1 choice for online Cisco rack rentals.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of John
Wong
Sent: Sunday, October 24, 2004 7:18 AM
To: Groupstudy - CCIE Lab
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
This archive was generated by hypermail 2.1.4 : Sat Nov 06 2004 - 17:11:52 GMT-3