[c-nsp] MPLS LDP Neighbourship Flapping

[Aamer Akhter (aakhter)]

Atiqur,

Is this a targetted peer (usually l2vpn or TE) or a basic peer (directly connected)?

You may want to get the output from the following debugs. Be sure to apply the peer acl so that you only get debugs from this particular peer.

debug mpls ldp messages received all peer-acl <acl>
debug mpls ldp messages sent all peer-acl <acl>
debug mpls ldp session io all peer-acl <acl>

Which version of IOS are you running? Be aware that the show-tech didn't seem to get sent...

-- 
Aamer Akhter / aa at cisco.com
NSITE - cisco Systems 

> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net 
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of 
> Atiqur Rahman Mohammed
> Sent: Saturday, November 12, 2005 6:13 AM
> To: cisco-nsp
> Subject: [c-nsp] MPLS LDP Neighbourship Flapping
> 
> Can anyone help resolving this issue.
> Please find topology diagram of my network attached.
>  The issue is that LDP neigbhourship between MCCTY1LOC1B001C76001 and
> MCCTY2LOC1B001C76001is flapping. I continuosly get these message.
> C76001#
> *Nov 12 15:06:17.654: %LDP-5-NBRCHG: LDP Neighbor
> 192.168.71.165:0<http://192.168.71.165:0/>is DOWN
> *Nov 12 15:07:53.516: %LDP-5-NBRCHG: LDP Neighbor
> 192.168.71.165:0<http://192.168.71.165:0/>is UP
> *Nov 12 15:10:53.476: %LDP-5-NBRCHG: LDP Neighbor
> 192.168.71.165:0<http://192.168.71.165:0/>is DOWN
>  *Output of the show mpls ldp neighbour command from 
> MCCTY1LOC1B001C76001*
> **
>  Peer LDP Ident: 192.168.71.164:0 <http://192.168.71.164:0/>; 
> Local LDP
> Ident 192.168.71.161:0 <http://192.168.71.161:0/>
> TCP connection: 192.168.71.164.11170 - 192.168.71.161.646
> State: Oper; Msgs sent/rcvd: 1680/1683; Downstream
> Up time: 23:44:50
> LDP discovery sources:
> Targeted Hello 192.168.71.161 <http://192.168.71.161/> ->
> 192.168.71.164<http://192.168.71.164/>,
> active, passive
> GE-WAN2/4, Src IP addr: 192.168.71.22 <http://192.168.71.22/>
> Addresses bound to peer LDP Ident:
> 192.168.71.164 <http://192.168.71.164/> 192.168.72.3 
> <http://192.168.72.3/>
> 192.168.49.130 <http://192.168.49.130/> 
> 192.168.71.189<http://192.168.71.189/>
> 192.168.71.22 <http://192.168.71.22/>
> Peer LDP Ident: 192.168.71.163:0 <http://192.168.71.163:0/>; 
> Local LDP Ident
> 192.168.71.161:0 <http://192.168.71.161:0/>
> TCP connection: 192.168.71.163.11192 - 192.168.71.161.646
> State: Oper; Msgs sent/rcvd: 1677/1678; Downstream
> Up time: 23:44:47
> LDP discovery sources:
> Targeted Hello 192.168.71.161 <http://192.168.71.161/> ->
> 192.168.71.163<http://192.168.71.163/>,
> active, passive
> Addresses bound to peer LDP Ident:
> 192.168.71.163 <http://192.168.71.163/> 5.5.5.2 <http://5.5.5.2/>
> 3.3.3.1<http://3.3.3.1/>
> 192.168.71.9 <http://192.168.71.9/>
> 192.168.49.33 <http://192.168.49.33/>
> Peer LDP Ident: 192.168.71.168:0 <http://192.168.71.168:0/>; 
> Local LDP Ident
> 192.168.71.161:0 <http://192.168.71.161:0/>
> TCP connection: 192.168.71.168.11120 - 192.168.71.161.646
> State: Oper; Msgs sent/rcvd: 1680/1678; Downstream
> Up time: 23:44:46
> LDP discovery sources:
> Targeted Hello 192.168.71.161 <http://192.168.71.161/> ->
> 192.168.71.168<http://192.168.71.168/>,
> active, passive
> Addresses bound to peer LDP Ident:
> 192.168.71.168 <http://192.168.71.168/> 
> 192.168.71.18<http://192.168.71.18/>
> Peer LDP Ident: 192.168.71.167:0 <http://192.168.71.167:0/>; 
> Local LDP Ident
> 192.168.71.161:0 <http://192.168.71.161:0/>
> TCP connection: 192.168.71.167.11059 - 192.168.71.161.646
> State: Oper; Msgs sent/rcvd: 1680/1686; Downstream
> Up time: 23:45:10
> LDP discovery sources:
> Targeted Hello 192.168.71.161 <http://192.168.71.161/> ->
> 192.168.71.167<http://192.168.71.167/>,
> active, passive
> Addresses bound to peer LDP Ident:
> 192.168.71.167 <http://192.168.71.167/> 
> 192.168.71.37<http://192.168.71.37/>
> 5.5.5.6 <http://5.5.5.6/> 3.3.3.2 <http://3.3.3.2/>
> Peer LDP Ident: 192.168.71.165:0 <http://192.168.71.165:0/>; 
> Local LDP Ident
> 192.168.71.161:0 <http://192.168.71.161:0/>
> TCP connection: 192.168.71.165.28858 - 192.168.71.161.646
> State: Oper; Msgs sent/rcvd: 59/2; Downstream
> Up time: 00:01:08
> LDP discovery sources:
> Targeted Hello 192.168.71.161 <http://192.168.71.161/> ->
> 192.168.71.165<http://192.168.71.165/>,
> active, passive
>  I am also attaching the output of show tech-support from
> MCCTY1LOC1B001C76001 and MCCTY2OC1B001C76001
> gards
> Atiqur Rahman
> Infocomm Technology Cente
> Reliance Infocomm
> Mobile: 09324621784
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
>