Trouble with OSPF redistribute on BGP and VRF connection

[saul.reyes]

Hi, actually we are make a solution with PE and CE but we have a trouble with redistributing routes from OSPF (Devices Juniper) to Cisco Catalyst 6500 (VSS) and VRF with ASR9000, the diagrame it´s ffollow:

if we are looking tables routing from VRF CAMPUS on ASR9K:

From BGP we are looking the addres loopback announce from Juniper on OSPF 172.16.161.1 but if i try to send a ping it doesn´t work:

other network learn is the segment between Cisco Catalyst and Juniper 172.16.19.28 but we only achieve the ip address on cisco catalyst from VRF CAMPUS but the ip address on Juniper NOT

If we are looking the routing table from Catalyst 6500 on VSS is the follow:

the loopback from juniper is learning from port-channel 28 and if we try to send a ping the follow is:

the configuration on Cisco Catalyst 6500 on VSS is:

router ospf 1

network 172.16.19.28 0.0.0.3 area 0

!

router bgp 64513

bgp log-neighbor-changes

neighbor 172.16.19.6 remote-as 64512

neighbor 172.16.19.10 remote-as 64512

!

address-family ipv4

  redistribute ospf 1 metric 110 match internal external 1 external 2

  neighbor 172.16.19.6 activate

  neighbor 172.16.19.10 activate

exit-address-family

someone know what happen with the routes learning from juniper when redistribute on BGP and learning from VRF CAMPUS,  why we can´t achieve the loopback and segments on juniper.

Best Regards

[saul.reyes]

sorry the diagrame have a mistake the loopback on juniper is 172.16.161.6

[Harold Ritter · Accepted solution]

Hi Saul,

The issue is that the ASR9K knows how to get to 172.16.161.6 (or 172.16.19.30) but the EX8208 does not know how to get back to 172.16.19.6, which is the source address used for the ping request. This is because the C6500 redistribute ospf into bgp but it does not redistribute bgp into ospf.

Regards