control routes on mpls router

[vishal.rane]

Hi

need assistance on how to control the routes for sending and receiving on a mpls router at HQ

MPLS cloud is running  BGP

on LAN we run OSPF

HQ routes need to be seen by remote office behind mpls

172.16.20.1/23

10.10.1.0/24

192.168.1.0/24

Remote office routes needs to be seen by HQ

192.168.100.0/24

192.168.105.0/24

192.168.110.0/26

*****

current config for ospf and bgp

***

router ospf 2

redistribute bgp 2154 subnets

network 172.16.1.1 0.0.0.3 area 0

router bgp 2154

no sync

redistribute ospf 1 match internal external 1 external 2

neighbor 172.31.66.253 remote-as 2100

Thanks

Vishal

[Lei Tian]

Hi,

Are you not seeing the routes in remote or HR? You should be able to see the routes with the redistribution. However, there will be potential routing loop with mutual redistribution. Few methods you can consider to avoid routing loop

1, do not use mutual redistribution, use network statement under bgp to advertise local routes instead.

2, use tag to filter routes

3, use prefix-list to limit ospf/bgp only redistribute local routes.

HTH,

Lei Tian

[vishal.rane]

Lei

can you help with an example to follow

[Lei Tian]

Hi,

INE has a pretty good VOD on route redistribution, which you can find from

http://blog.ine.com/tag/route-redistribution/

There is also document on CCO that has example on using tag to prevent routing loop

http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a008009487e.shtml

http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a008047915d.shtml

HTH,

Lei Tian