Dead RIP route stuck in routing table!

kevin.shi · ‎07-10-2009

please see below output, default route stuck in VPN routing table for 15:46:40 although the ' Hold down timer expires in 0 secs' and flushed time is 240 secs. has anyone expirienced this problem? is this normal practice on Cisco router? thanks

r0#sh ip ro vrf 504-ten 0.0.0.0

Routing entry for 0.0.0.0/0, supernet

Known via "rip", distance 120, metric 4294967295 (inaccessible), candidate default path

Redistributing via rip, bgp 65500

Advertised by rip (self originated)

bgp 65500 route-map weight-0-local-pref-800

Last update from 10.250.41.86 on Serial1/0.1/1/6/3:0, 15:46:40 ago

Hold down timer expires in 0 secs

r0#sh ip pro vrf 504-ten

Routing Protocol is "rip"

Outgoing update filter list for all interfaces is 59

Incoming update filter list for all interfaces is not set

Sending updates every 30 seconds, next due in 20 seconds

Invalid after 180 seconds, hold down 180, flushed after 240

Redistributing: static, rip, bgp 65500

Giuseppe Larosa · ‎07-10-2009

Hello Kevin,

this is not normal

note also that

Known via "rip", distance 120, metric 4294967295 (inaccessible), candidate default path

the metric is expressed as a 32 bit integer when infinity in RIP should be 16!

Verify that there is no routing loop caused by multiple mutual redistribution betweeen RIP and BGP address-family ipv4 vrf 504-ten.

But you may be hitting a bug.

What platform is this and what IOS image is running on it

Hope to help

Giuseppe

kevin.shi · ‎07-10-2009

Thanks for you reply, Giuseppe.

That is 7206VXR, please see below info:

r0#sh ver

Cisco IOS Software, 7200 Software (C7200-P-M), Version 12.4(19b), RELEASE SOFTWARE (fc1)

Technical Support: http://www.cisco.com/techsupport

Compiled Fri 13-Jun-08 14:32 by prod_rel_team

ROM: System Bootstrap, Version 12.3(4r)T1, RELEASE SOFTWARE (fc1)

BOOTLDR: 7200 Software (C7200-KBOOT-M), Version 12.3(5a), RELEASE SOFTWARE (fc1)

r0 uptime is 1 year, 2 weeks, 1 day, 10 hours, 17 minutes

System returned to ROM by reload at 02:00:09 BST Wed Jun 25 2008

System restarted at 02:02:38 BST Wed Jun 25 2008

System image file is "disk2:c7200-p-mz.124-19b.bin"

Last reload reason: Reload Command

Cisco 7206VXR (NPE-G1) processor (revision B) with 229376K/32768K bytes of memory.

Processor board ID 20404511

SB-1 CPU at 700MHz, Implementation 1025, Rev 0.2, 512KB L2 Cache

6 slot VXR midplane, Version 2.0

The serial interface has been down for over 15 hours. so I can fonfirm at least within these 15 hours there was no route loop. After I redeployed RIP config, routing became normal

Seems really a bug!