Re: Redistribute OSPF routes into BGP bug?

Rick Bergfeld · ‎11-05-2012

Site connectivity is as follows.

distributing ospf routes into bgp and bgp routes into ospf

I've implemented prefix-lists to filter out networks. It's working when using /24 statements.

ip prefix-list OSPFtoBGP seq 5 permit 10.1.2.0/24

ip prefix-list OSPFtoBGP seq 10 permit 10.1.7.0/24

ip prefix-list OSPFtoBGP seq 15 permit 10.1.11.0/24

ip prefix-list OSPFtoBGP seq 20 permit 10.1.15.0/24

ip prefix-list OSPFtoBGP seq 25 permit 192.168.6.0/24

ip prefix-list OSPFtoBGP seq 30 permit 192.168.8.0/24

ip prefix-list OSPFtoBGP seq 35 permit 192.168.9.0/24

!

route-map OSPF_BGP permit 10

match ip address prefix-list OSPFtoBGP

!

route-map OSPF_BGP deny 50

!

router bgp 65534

redistribute connected

redistribute ospf 100 route-map OSPF_BGP

sh ip route bgp

10.0.0.0/8 is variably subnetted, 57 subnets, 4 masks

B 10.1.11.0/24 [20/0] via 10.125.35.2, 00:36:57

B 10.1.15.0/24 [20/0] via 10.125.35.2, 00:36:57

B 10.1.2.0/24 [20/0] via 10.125.35.2, 00:36:57

B 10.1.7.0/24 [20/0] via 10.125.35.2, 00:37:23

B 192.168.9.0/24 [20/0] via 10.125.35.2, 00:36:57

B 192.168.6.0/24 [20/0] via 10.125.35.2, 00:37:23

<UPDATE> Instead of adding more entries to prefix-list OSPFtoBGP for 10.7.4.0/24, 10.7.8.0/24, 10.7.28.0/24, etc, I would like to add an entry to the prefix list that would cover this entire 10.7.0.0/16 network. <UPDATE>

But when I try to add this prefix so that I can summarize the prefix list alot easier so I don't have to add singular /24 networks.

ip prefix-list OSPFtoBGP seq 155 permit 10.7.0.0/16 ge 24 le 24

It drops local bgp routes entirely for about 10 minutes after I remove the prefix statement.

Cisco 6509

Cisco Internetwork Operating System Software

IOS (tm) s72033_rp Software (s72033_rp-IPSERVICES_WAN-M), Version 12.2(18)SXF11, RELEASE SOFTWARE (fc1)

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

Compiled Fri 14-Sep-07 21:39 by kellythw

Cisco 1900 series router

Cisco IOS Software, C1900 Software (C1900-UNIVERSALK9_NPE-M), Version 15.1(2)T4, RELEASE SOFTWARE (fc1)..Technical Support: http://www.cisco.com/techsupport..Copyright (c) 1986-2011 by Cisco Systems, Inc...Compiled Tue 12-Jul-11 13:50 by prod_rel_team

Message was edited by: Rick Bergfeld

hectorbrenesr · ‎11-05-2012

I think what you want is:

ip prefix-list OSPFtoBGP seq 155 permit 10.1.0.0/20 le 24

The prefix you used to summarize (10.7.0.0/16) doesn't match anything else on the configuration.

Rick Bergfeld · ‎11-05-2012

Sorry, I clarified what it is I'm trying to do. Instead of adding 10.7.4.0/24, 10.7.8.0/24, etc for every network in the 10.7.0.0/16 space, I would just like to add 1 line that would cover the whole network instead of the individual entries. But when I add the statement ip prefix-list OSPFtoBGP seq 155 permit 10.7.0.0/16 ge 24 le 24, my BGP session drops. it reconverges 10 minutes later after I remove that line.

shaijo.mohan · ‎11-05-2012

Prefix list entry '10.7.0.0/16 ge 24 le 24' indeed matches your requirement. Also I have simulated a local setup and could not reproduce the issue. I was only checking the OSP to BGP redistribution and everything looks fine

Could you post topology, OSPF and BGP configuration and routing table?

Rick Bergfeld · ‎11-06-2012

SITE A is connected to SITE B by Provider A using BGP

SITE C is connected to SITE B by Provider B using OSPF

I have OSPF & BGP configured on the core switch at Site B.

OSPF & BGP Config.

router ospf 100

log-adjacency-changes

redistribute bgp 65534 subnets route-map BGP_OSPF

network 10.2.2.0 0.0.0.255 area 0

network 10.2.7.0 0.0.0.255 area 0

network 10.2.8.0 0.0.0.255 area 0

network 10.2.9.0 0.0.0.255 area 0

network 10.2.11.0 0.0.0.255 area 0

network 10.2.12.0 0.0.0.255 area 0

network 10.2.13.0 0.0.0.255 area 0

network 10.2.14.0 0.0.0.255 area 0

network 10.2.16.0 0.0.0.255 area 0

network 10.2.17.0 0.0.0.255 area 0

network 10.2.20.0 0.0.0.255 area 0

network 10.2.21.0 0.0.0.255 area 0

network 10.2.22.0 0.0.0.255 area 0

network 10.2.23.0 0.0.0.255 area 0

network 10.2.24.0 0.0.0.255 area 0

network 10.2.25.0 0.0.0.255 area 0

network 10.2.28.0 0.0.0.255 area 0

network 10.2.29.0 0.0.0.255 area 0

network 192.168.30.0 0.0.1.255 area 0

network 192.168.36.0 0.0.0.255 area 0

!

router bgp 65534

no synchronization

bgp router-id 10.2.35.1

bgp log-neighbor-changes

network 10.2.0.0 mask 255.255.0.0

network 172.16.100.0

network 192.168.30.0 mask 255.255.254.0

network 192.168.36.0

redistribute connected

redistribute ospf 100 route-map OSPF_BGP

neighbor 10.2.35.2 remote-as 65000

neighbor 10.2.35.2 distribute-list windstream in

no auto-summary

!

Here is the routing table. (no the BGP route times. This is when I tried to add the line.)

O IA 192.168.12.0/24 [110/7] via 192.168.30.1, 5d22h, Vlan1

O IA 192.168.13.0/24 [110/7] via 192.168.30.1, 5d22h, Vlan1

B 192.168.133.0/24 [20/0] via 10.2.35.2, 23:10:02

O IA 192.168.14.0/24 [110/7] via 192.168.30.1, 5d22h, Vlan1

B 192.168.15.0/24 [20/0] via 10.2.35.2, 23:10:02

O IA 192.168.8.0/24 [110/7] via 192.168.30.1, 5d22h, Vlan1

O IA 192.168.25.0/24 [110/7] via 192.168.30.1, 5d22h, Vlan1

O IA 192.168.24.0/24 [110/7] via 192.168.30.1, 5d22h, Vlan1

O IA 192.168.9.0/24 [110/7] via 192.168.30.1, 5d22h, Vlan1

209.156.43.0/30 is subnetted, 1 subnets

B 209.156.43.68 [20/0] via 10.2.35.2, 23:10:02

B 192.168.10.0/24 [20/0] via 10.2.35.2, 23:10:02

172.16.0.0/24 is subnetted, 1 subnets

B 172.16.1.0 [20/0] via 10.2.35.2, 23:10:02

B 192.168.11.0/24 [20/0] via 10.2.35.2, 23:10:05

192.168.4.0/24 is variably subnetted, 2 subnets, 2 masks

O E2 192.168.4.11/32 [110/21] via 192.168.30.1, 1d13h, Vlan1

O E2 192.168.4.0/24 [110/21] via 192.168.30.1, 1d03h, Vlan1

O IA 192.168.21.0/24 [110/7] via 192.168.30.1, 5d22h, Vlan1

O IA 192.168.201.0/24 [110/79] via 192.168.30.1, 5d22h, Vlan1

O IA 192.168.20.0/24 [110/7] via 192.168.30.1, 5d22h, Vlan1

B 192.168.5.0/24 [20/0] via 10.2.35.2, 23:10:05

10.0.0.0/8 is variably subnetted, 161 subnets, 5 masks

O 10.7.13.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O 10.6.12.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O 10.4.14.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.3.9.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

C 10.2.8.0/24 is directly connected, Vlan8

O IA 10.1.11.0/24 [110/7] via 192.168.30.1, 5d22h, Vlan1

O IA 10.9.2.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

O 10.7.12.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O 10.6.13.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.5.14.0/24 [110/71] via 192.168.30.1, 1d13h, Vlan1

O IA 10.3.8.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

C 10.2.9.0/24 is directly connected, Vlan9

O 10.6.14.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.5.13.0/24 [110/71] via 192.168.30.1, 1d13h, Vlan1

O 10.4.12.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.3.11.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

O 10.7.14.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.5.12.0/24 [110/71] via 192.168.30.1, 1d13h, Vlan1

O 10.4.13.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

C 10.2.11.0/24 is directly connected, Vlan11

O IA 10.9.7.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

O 10.7.9.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O 10.6.8.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.5.11.0/24 [110/71] via 192.168.30.1, 1d13h, Vlan1

O IA 10.3.13.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

C 10.2.12.0/24 is directly connected, Vlan12

O IA 10.1.15.0/24 [110/7] via 192.168.30.1, 5d22h, Vlan1

O 10.7.8.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O 10.6.9.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O 10.4.11.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.3.12.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

C 10.2.13.0/24 is directly connected, Vlan13

O 10.7.11.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O 10.4.8.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

C 10.2.14.0/24 is directly connected, Vlan14

O IA 10.9.4.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

O 10.6.11.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.5.8.0/24 [110/71] via 192.168.30.1, 1d13h, Vlan1

O 10.4.9.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.3.14.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

O IA 10.9.11.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

O IA 10.5.6.0/24 [110/71] via 192.168.30.1, 1d13h, Vlan1

O 10.4.7.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.1.2.0/24 [110/7] via 192.168.30.1, 5d22h, Vlan1

O IA 10.9.9.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

O 10.7.7.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

C 10.2.2.0/24 is directly connected, Vlan2

B 10.0.0.0/24 [20/0] via 10.2.35.2, 23:10:06

O IA 10.9.8.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

O 10.6.7.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.5.4.0/24 [110/71] via 192.168.30.1, 1d13h, Vlan1

O IA 10.3.2.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

O 10.4.2.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.3.5.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

O IA 10.1.7.0/24 [110/7] via 192.168.30.1, 5d22h, Vlan1

O IA 10.9.14.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

O IA 10.5.2.0/24 [110/71] via 192.168.30.1, 1d13h, Vlan1

O IA 10.3.4.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

O IA 10.9.13.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

O 10.6.2.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.3.7.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

O IA 10.9.12.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

O 10.7.2.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.3.6.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

C 10.2.7.0/24 is directly connected, Vlan7

O 10.6.28.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

C 10.2.24.0/24 is directly connected, Vlan24

B 10.125.102.0/24 [20/0] via 10.2.35.2, 23:10:06

O IA 10.9.18.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

O 10.7.28.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.3.24.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

C 10.2.25.0/24 is directly connected, Vlan25

B 10.125.101.0/24 [20/0] via 10.2.35.2, 23:10:06

O IA 10.9.17.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

O 10.4.28.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.9.16.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

O IA 10.5.28.0/24 [110/71] via 192.168.30.1, 1d13h, Vlan1

O IA 10.9.23.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

O 10.7.25.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O 10.6.24.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

C 10.2.28.0/24 is directly connected, Vlan28

O IA 10.9.22.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

O 10.7.24.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O 10.6.25.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.3.28.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

O IA 10.9.21.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

O 10.4.24.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.9.20.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

O IA 10.5.24.0/24 [110/71] via 192.168.30.1, 1d13h, Vlan1

O 10.4.25.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O 10.7.21.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O 10.6.20.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.5.23.0/24 [110/71] via 192.168.30.1, 1d13h, Vlan1

O 10.4.22.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.3.17.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

C 10.2.16.0/24 is directly connected, Vlan16

O 10.7.20.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O 10.6.21.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.5.22.0/24 [110/71] via 192.168.30.1, 1d13h, Vlan1

O 10.4.23.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.3.16.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

C 10.2.17.0/24 is directly connected, Vlan17

O IA 10.9.25.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

O 10.7.23.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O 10.6.22.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.5.21.0/24 [110/71] via 192.168.30.1, 1d13h, Vlan1

O 10.4.20.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.9.24.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

O 10.7.22.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O 10.6.23.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.5.20.0/24 [110/71] via 192.168.30.1, 1d13h, Vlan1

O 10.4.21.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O 10.7.17.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O 10.6.16.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O 10.4.18.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.3.21.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

C 10.2.20.0/24 is directly connected, Vlan20

O 10.7.16.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O 10.6.17.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.3.20.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

C 10.2.21.0/24 is directly connected, Vlan21

O IA 10.5.17.0/24 [110/71] via 192.168.30.1, 1d13h, Vlan1

O 10.4.16.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.3.23.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

C 10.2.22.0/24 is directly connected, Vlan22

O IA 10.9.28.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

O IA 10.5.16.0/24 [110/71] via 192.168.30.1, 1d13h, Vlan1

O 10.4.17.0/24 [110/70] via 192.168.30.1, 5d22h, Vlan1

O IA 10.3.22.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

C 10.2.23.0/24 is directly connected, Vlan23

O IA 10.50.29.0/29 [110/70] via 192.168.30.1, 5d22h, Vlan1

O E2 10.50.17.0/24 [110/21] via 192.168.30.1, 1d13h, Vlan1

C 10.2.35.0/30 is directly connected, Vlan351

B 10.125.35.20/30 [20/0] via 10.2.35.2, 23:10:07

B 10.125.54.0/24 [20/0] via 10.2.35.2, 23:10:07

B 10.125.35.16/30 [20/0] via 10.2.35.2, 23:10:07

B 10.125.50.0/24 [20/0] via 10.2.35.2, 23:10:07

O IA 10.5.69.0/24 [110/71] via 192.168.30.1, 1d13h, Vlan1

O IA 10.3.69.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

B 10.125.35.4/30 [20/0] via 10.2.35.2, 23:10:07

B 10.125.35.0/30 [20/0] via 10.2.35.2, 23:10:07

B 10.125.34.0/24 [20/0] via 10.2.35.2, 23:10:07

B 10.125.32.0/24 [20/0] via 10.2.35.2, 23:10:07

B 10.125.44.0/24 [20/0] via 10.2.35.2, 23:10:07

B 10.125.35.8/30 [20/0] via 10.2.35.2, 23:10:07

B 10.125.28.0/24 [20/0] via 10.2.35.2, 23:10:07

O IA 10.3.100.0/24 [110/71] via 192.168.30.1, 5d22h, Vlan1

B 10.125.24.0/24 [20/0] via 10.2.35.2, 23:10:07

B 10.125.7.0/24 [20/0] via 10.2.35.2, 23:10:07

B 10.127.4.0/24 [20/0] via 10.2.35.2, 23:10:07

B 10.125.4.0/24 [20/0] via 10.2.35.2, 23:10:07

B 10.126.0.0/16 [20/0] via 10.2.35.2, 23:10:07

B 10.125.1.0/24 [20/0] via 10.2.35.2, 23:10:07

B 10.125.0.0/24 [20/0] via 10.2.35.2, 23:10:07

B 10.125.15.0/24 [20/0] via 10.2.35.2, 23:10:07

B 10.125.14.0/24 [20/0] via 10.2.35.2, 23:10:07

B 10.125.8.0/24 [20/0] via 10.2.35.2, 23:10:07

B 10.131.0.0/16 [20/0] via 10.2.35.2, 23:10:07

B 10.125.254.0/25 [20/0] via 10.2.35.2, 23:10:07

B 10.125.253.0/24 [20/0] via 10.2.35.2, 23:10:07

B 10.132.0.0/16 [20/0] via 10.2.35.2, 23:10:07

O IA 192.168.6.0/24 [110/7] via 192.168.30.1, 5d22h, Vlan1

O IA 192.168.23.0/24 [110/7] via 192.168.30.1, 5d22h, Vlan1

C 192.168.36.0/24 is directly connected, Vlan36

O IA 192.168.22.0/24 [110/7] via 192.168.30.1, 5d22h, Vlan1

B 192.168.7.0/24 [20/0] via 10.2.35.2, 23:10:07

O IA 192.168.17.0/24 [110/7] via 192.168.30.1, 5d22h, Vlan1

O IA 192.168.16.0/24 [110/7] via 192.168.30.1, 5d22h, Vlan1

B 192.168.2.0/24 [20/0] via 10.2.35.2, 23:10:07

O IA 192.168.19.0/24 [110/7] via 192.168.30.1, 5d22h, Vlan1

O IA 192.168.18.0/24 [110/7] via 192.168.30.1, 5d22h, Vlan1

S* 0.0.0.0/0 [1/0] via 192.168.30.1

O IA 192.168.28.0/23 [110/7] via 192.168.30.1, 5d22h, Vlan1

C 192.168.30.0/23 is directly connected, Vlan1

O 192.168.60.0/23 [110/69] via 192.168.30.1, 5d22h, Vlan1

O 192.168.40.0/23 [110/69] via 192.168.30.1, 5d22h, Vlan1

O IA 192.168.4.0/23 [110/16] via 192.168.30.1, 5d22h, Vlan1

O IA 192.168.0.0/23 [110/6] via 192.168.30.1, 5d22h, Vlan1

O IA 192.168.50.0/23 [110/70] via 192.168.30.1, 1d13h, Vlan1

O IA 192.168.84.0/23 [110/70] via 192.168.30.1, 5d22h, Vlan1

O 192.168.70.0/23 [110/69] via 192.168.30.1, 5d22h, Vlan1

O IA 192.168.86.0/23 [110/70] via 192.168.30.1, 5d22h, Vlan1

I've taken some of the network out.

shaijo.mohan · ‎11-07-2012

Tried the same confiugration on a miniscule network. Applied the same mutual redistribution configs and the results looks fine here.

Routing table
O       10.7.8.0/24 [110/2] via 192.168.30.1, 00:08:08, FastEthernet2/0
O       10.7.11.0/24 [110/2] via 192.168.30.1, 00:08:08, FastEthernet2/0
C       10.2.35.0/30 is directly connected, FastEthernet2/1
B       10.125.35.0/30 [20/0] via 10.2.35.2, 00:08:48
C    192.168.30.0/23 is directly connected, FastEthernet2/0

Prefix list counters

seq 155 permit 10.7.0.0/16 ge 24 le 24 (hit count: 38, refcount: 1)

BGP table
*> 10.7.8.0/24 192.168.30.1 2 32768 ?
*> 10.7.11.0/24 192.168.30.1 2 32768 ?

Though may not be related to this error, I am wondering why both redistributed connected and

'network 192.168.30.0 mask 255.255.254.0' is added under BGP config

Rick Bergfeld · ‎11-07-2012

thanks for testing in a different environment. I don't know what the problem is.

I added the network statements so that I could keep track of what networks are behind which routers. My topology was only summarized as these 3 sites are the only ones involved in the OSPF <--> BGP distributions.

Is there a problem with doing that?

varununiyal · ‎11-07-2012

I hope this BGP is not over GRE ?

Rick Bergfeld · ‎11-07-2012

Care to elaborate? 1 router has OSPF running, 1 router has BGP running. The Data Center switch is running BGP and OSPF. All 3 devices are local. No GRE.

Rick Bergfeld · ‎11-08-2012

Figured it out. I was hitting he max prefix limit set by the Provider on their Edge router. Took them 3 days to respond to my open support request.

http://www.cisco.com/en/US/tech/tk365/technologies_configuration_example09186a008010a28a.shtml