OSPF external routes showing in database but not in routing table.

[tech_king]

Ive attempted to upgrade my 2901 from 15.1(4)M4 to IOS version 15.4.3M8  but when I do so routes from my MPLS PE router do not make it into my routing table They show in my ospf database but for some reason are not populating my routing table. Below is my ospf config. Im connected to my PE router as a static neighbor since the link does not allow multicast traffic.

router ospf 1 vrf MPLS
 router-id 10.4.21.158
 priority 0
 redistribute static subnets
 network 10.4.21.156 0.0.0.3 area 1.1.1.1
 network 172.16.12.0 0.0.0.3 area 1.1.1.1
 network 192.168.0.0 0.0.0.255 area 1.1.1.1
 network 192.168.2.0 0.0.0.63 area 1.1.1.1
 network 192.168.42.0 0.0.0.255 area 1.1.1.1
 neighbor 10.4.21.157
 default-information originate
 distribute-list prefix ROUTE_FILTER in

[Harold Ritter · Accepted solution]

Hi,

The issue is that the VPN tag is set by the PE to avoid redistributing the routes back on other PEs. When received by the CE in VRF lite mode, the VPN tag is checked against the local VPN tag and the routes are rejected if it is equal. You can configure the "capability vrf-lite" command under "router ospf 1 vrf MPLS" for the VPN tag check not to take place.

Regards,