topic Re: Redistribution from BGP to OSPF - both withing same VRF in Routing and SD-WAN

Redistribution from BGP to OSPF - both withing same VRF

Warren Sullivan — Fri, 26 Jul 2024 00:15:37 GMT

Hi Guys,

I'm going around in circles, i can't see what is wrong here, i have essentially 3 routers, ill abbreviate to the last 5 or so characters in hostname for brevity, aco-R1 is running BGP under vrf iA-0160 as is aco-r5 - they are neighbors, all good. aco-r5 and pro-r5 are running ospf instance 2 and are neighbors, i am redistributing ospf 2 into bgp, and bgp into ospf 2.

On aco-r1 i can see the BGP route for 172.29.38.0/29, but on pro-r5 i cannot see the route for 10.79.126.164/30 being redistrubuted?

What have i missed?

BGP Neighbor on aco-r1

BGP Neighbor on aco-r5

OSPF neighbor on aco-r5

OPSF neighbor on pro-r5

BGP, OSPF and redist config on aco-r5

sh ip route on aco-r1 - can see redistrubuted route from ospf

sh ip route on pro-r5 - nothing

Re: Redistribution from BGP to OSPF - both withing same VRF

David Ruess — Fri, 26 Jul 2024 00:32:22 GMT

Hello,

On R5 its not learning the route 10.79.126.164/30 from BGP. Its directly connected. So redistributing BGP won't work. Have you tried also redistributing connected?

-David

Re: Redistribution from BGP to OSPF - both withing same VRF

MHM Cisco World — Fri, 26 Jul 2024 00:32:54 GMT

Add

Compatibility vrf lite

Under ospf

And it will work

MHM

Re: Redistribution from BGP to OSPF - both withing same VRF

Flavio Miranda — Fri, 26 Jul 2024 00:39:14 GMT

Hi @Warren Sullivan

Run "bgp redistribute-internal" in the acp-r5

Re: Redistribution from BGP to OSPF - both withing same VRF

Warren Sullivan — Fri, 26 Jul 2024 00:47:06 GMT

There is a loopback on aco-r1 that is being advertised to aco-r5 via BGP, see below

Re: Redistribution from BGP to OSPF - both withing same VRF

Warren Sullivan — Fri, 26 Jul 2024 00:49:00 GMT

Sorry, this is not an option under the ospf process on this device, it is a 1000v
thanks for your suggestion!

Re: Redistribution from BGP to OSPF - both withing same VRF

Warren Sullivan — Fri, 26 Jul 2024 00:49:51 GMT

unfortunately this didn't fix it, thanks for the suggestion!

Re: Redistribution from BGP to OSPF - both withing same VRF

MHM Cisco World — Fri, 26 Jul 2024 00:53:39 GMT

Do under ospf

Compatibility?

Share it here

Without this command the ospf will never redistribute bgp into ospf since down bit is set.

MHM

Re: Redistribution from BGP to OSPF - both withing same VRF

David Ruess — Fri, 26 Jul 2024 01:15:25 GMT

How is the 10.79.126.164/30 route being learned on R5. If its directly connected you may need to issue the redistribute connected command as well.

-David

Re: Redistribution from BGP to OSPF - both withing same VRF

Warren Sullivan — Fri, 26 Jul 2024 01:16:22 GMT

Re: Redistribution from BGP to OSPF - both withing same VRF

MHM Cisco World — Fri, 26 Jul 2024 01:20:27 GMT

Sorry it capability not compatible keyword

So command must be

Capability vrf lite

MHM

Re: Redistribution from BGP to OSPF - both withing same VRF

Harold Ritter — Fri, 26 Jul 2024 01:20:41 GMT

Hi @Warren Sullivan ,

10.79.126.164/30 is a connected route on aco-r5. If you want pro-r5 to learn it via ospf, you need to configure "redistribute connected" on aco-r5 as suggested by @David Ruess .

router ospf 2 vrf IA-0160

redistribute connected subnets

Regards,

Re: Redistribution from BGP to OSPF - both withing same VRF

MHM Cisco World — Fri, 26 Jul 2024 01:31:01 GMT

To be clear here command

Capability vrf lite to redistribute bgp LO into ospf not direct connect link between two bgp peers

Again without this command ospf not redistribute any prefix via bgp

MHM

Re: Redistribution from BGP to OSPF - both withing same VRF

Warren Sullivan — Fri, 26 Jul 2024 04:16:35 GMT

this worked for the /30 but i still cannot see the loopback on aco-r1, and is leaned by aco-r5?

Re: Redistribution from BGP to OSPF - both withing same VRF

Warren Sullivan — Fri, 26 Jul 2024 04:22:46 GMT

This fixed it!