04-06-2012 06:32 AM
Hello Everyone,
i ran the LDP on OSPF within BGP, both ospf and bgp connections were up. the loopback interfaces between two peers were also pingable each other. but LDP neighbor came never up. With Debug mpls ldp transport connection was following log output showed
debug mpls ldp transport events
LDP transport connection events debugging is on
switch-1#
*Apr 6 13:15:44.127: ldp: Opening ldp conn; adj 0x4A2AE790, 172.16.249.45 <-> 172.16.249.2; with normal priority
*Apr 6 13:15:44.127: ldp: No MD5 password protection for peer 172.16.249.2:0
*Apr 6 13:15:44.127: ldp: Registered TCB with LDP TCB database tcb 0x54FC8E40 [key 8775], total 1
*Apr 6 13:15:44.139: ldp: ldp conn is up; adj 0x4A2AE790, 172.16.249.45:43370 <-> 172.16.249.2:646
*Apr 6 13:15:44.175: ldp: Close LDP transport conn for adj 0x4A2AE790
*Apr 6 13:15:44.175: ldp: Unregistered from LDP TCB database tcb 0x54FC8E40 [key 8775], total 0
*Apr 6 13:15:44.175: ldp: Closing ldp conn 172.16.249.45:43370 <-> 172.16.249.2:646, adj 0x4A2AE790
*Apr 6 13:16:04.279: ldp: Scan listening TCBs
switch-1#show mpls ldp parameters
LDP Feature Set Manager: State Initialized
LDP features:
Basic
IP-over-MPLS
TDP
Protocol version: 1
Session hold time: 180 sec; keep alive interval: 60 sec
Discovery hello: holdtime: 15 sec; interval: 5 sec
Discovery targeted hello: holdtime: 90 sec; interval: 10 sec
Downstream on Demand max hop count: 255
LDP for targeted sessions
LDP initial/maximum backoff: 15/120 sec
LDP loop detection: off
switch-1#show mpls ldp neighbor ------
--------------------------------------------this is empty,no neighor
switch-1#
*Apr 6 13:18:01.915: ldp: Send ldp hello; GigabitEthernet2/6/3, src/dst 172.16.65.86/224.0.0.2, inst_id 0
*Apr 6 13:18:04.131: ldp: Rcvd ldp hello; GigabitEthernet2/6/3, from 172.16.249.2 (172.16.249.2:0), intf_id 0, opt 0xC
*Apr 6 13:18:04.131: ldp: Ignore LDP Hello from 172.16.249.2, GigabitEthernet2/6/3; backoff from failed session
*Apr 6 13:18:04.279: ldp: Scan listening TCBs
*Apr 6 13:18:06.063: ldp: Send ldp hello; GigabitEthernet2/6/3, src/dst 172.16.65.86/224.0.0.2, inst_id 0
*Apr 6 13:18:08.131: ldp: Rcvd ldp hello; GigabitEthernet2/6/3, from 172.16.249.2 (172.16.249.2:0), intf_id 0, opt 0xC
*Apr 6 13:18:08.131: ldp: Ignore LDP Hello from 172.16.249.2, GigabitEthernet2/6/3; backoff from failed session
*Apr 6 13:18:10.075: ldp: Send ldp hello; GigabitEthernet2/6/3, src/dst 172.16.65.86/224.0.0.2, inst_id 0
*Apr 6 13:18:12.135: ldp: Rcvd ldp hello; GigabitEthernet2/6/3, from 172.16.249.2 (172.16.249.2:0), intf_id 0, opt 0xC
*Apr 6 13:18:12.135: ldp: Ignore LDP Hello from 172.16.249.2, GigabitEthernet2/6/3; backoff from failed session
*Apr 6 13:18:14.047: ldp: Send ldp hello; GigabitEthernet2/6/3, src/dst 172.16.65.86/224.0.0.2, inst_id 0
*Apr 6 13:18:16.135: ldp: Rcvd ldp hello; GigabitEthernet2/6/3, from 172.16.249.2 (172.16.249.2:0), intf_id 0, opt 0xC
*Apr 6 13:18:16.135: ldp: Ignore LDP Hello from 172.16.249.2, GigabitEthernet2/6/3; backoff from failed session
*Apr 6 13:18:19.027: ldp: Send ldp hello; GigabitEthernet2/6/3, src/dst 172.16.65.86/224.0.0.2, inst_id 0
*Apr 6 13:18:20.135: ldp: Rcvd ldp hello; GigabitEthernet2/6/3, from 172.16.249.2 (172.16.249.2:0), intf_id 0, opt 0xC
*Apr 6 13:18:20.135: ldp: Ignore LDP Hello from 172.16.249.2, GigabitEthernet2/6/3; backoff from failed session
*Apr 6 13:18:22.835: ldp: Send ldp hello; GigabitEthernet2/6/3, src/dst 172.16.65.86/224.0.0.2, inst_id 0
*Apr 6 13:18:24.131: ldp: Rcvd ldp hello; GigabitEthernet2/6/3, from 172.16.249.2 (172.16.249.2:0), intf_id 0, opt 0xC
*Apr 6 13:18:24.135: ldp: Ignore LDP Hello from 172.16.249.2, GigabitEthernet2/6/3; backoff from failed session
*Apr 6 13:18:27.215: ldp: Send ldp hello; GigabitEthernet2/6/3, src/dst 172.16.65.86/224.0.0.2, inst_id 0
*Apr 6 13:18:28.135: ldp: Rcvd ldp hello; GigabitEthernet2/6/3, from 172.16.249.2 (172.16.249.2:0), intf_id 0, opt 0xC
*Apr 6 13:18:28.135: ldp: Ignore LDP Hello from 172.16.249.2, GigabitEthernet2/6/3; backoff from failed session
*Apr 6 13:18:31.183: ldp: Send ldp hello; GigabitEthernet2/6/3, src/dst 172.16.65.86/224.0.0.2, inst_id 0
*Apr 6 13:18:32.135: ldp: Rcvd ldp hello; GigabitEthernet2/6/3, from 172.16.249.2 (172.16.249.2:0), intf_id 0, opt 0xC
*Apr 6 13:18:32.135: ldp: Ignore LDP Hello from 172.16.249.2, GigabitEthernet2/6/3; backoff from failed session
*Apr 6 13:18:35.087: ldp: Send ldp hello; GigabitEthernet2/6/3, src/dst 172.16.65.86/224.0.0.2, inst_id 0
*Apr 6 13:18:36.135: ldp: Rcvd ldp hello; GigabitEthernet2/6/3, from 172.16.249.2 (172.16.249.2:0), intf_id 0, opt 0xC
*Apr 6 13:18:36.135: ldp: Ignore LDP Hello from 172.16.249.2, GigabitEthernet2/6/3; backoff from failed session
*Apr 6 13:18:39.879: ldp: Send ldp hello; GigabitEthernet2/6/3, src/dst 172.16.65.86/224.0.0.2, inst_id 0
*Apr 6 13:18:40.135: ldp: Rcvd ldp hello; GigabitEthernet2/6/3, from 172.16.249.2 (172.16.249.2:0), intf_id 0, opt 0xC
*Apr 6 13:18:40.135: ldp: Ignore LDP Hello from 172.16.249.2, GigabitEthernet2/6/3; backoff from failed session
04-06-2012 06:42 AM
switch-1#show mpls ldp disc
Local LDP Identifier:
172.16.249.45:0
Discovery Sources:
Interfaces:
GigabitEthernet2/6/3 (ldp): xmit
eceiving LDP link hello's from the
neighboring router, on both sides.It only shows "xmit", but not "recv".
I make sure that the loopback0 has a host route (/32) to the LDP router ID of the
neighboring router
04-06-2012 07:08 AM
what about the passwords?
04-06-2012 06:50 PM
04-09-2012 06:59 AM
are u sumarizing the routes in between?
are there any ACL's in between?
is the mpls ip configured on all relevant interfaces?
are you using the "mpls ldp router-id loopback0 force" command on both sides.
check all of above and maybe it should help you find some direction
HTH
Kishore
04-12-2012 05:55 AM
Check the cef too
Sent from Cisco Technical Support iPhone App
04-24-2012 07:10 AM
Do you permit targeted LDP by
mpls ldp discovery targeted-hello accept ... ?
Regards,
Sergey
11-11-2017 08:39 PM
02-04-2013 02:25 PM
Did you ever fix this problem. I seem to be having the same problem and can't figure it out.
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