I finally got it working by just reloading the router. Feels like troubleshooting Windows product now - reboot first!
Now, I got the import working. I am wondering if there is a dynamic export feature to export VRF routes into Global Routing Table.
Here is the problem. All sites are connected to a MPLS VPN cloud. Networks located at the Data Centers are in the Global Routing Table. Branch offices have several VRFs using VRF-lite, for example, Engineer VRF and Finance VRF. All VRF-lites are also configured on the data center WAN edge routers. So far I have managed to import data center networks into both Engineer VRF and Finance VRF using "import ipv4 unicast" command. How do I export Engineer networks and Finance networks to the data center? "export ipv4 unicast" does not exist.
I finally tried GRE based route leaking on the same router. I can finally have connectivity between a VRF and the Global Routing Table.
ip address 192.0.2.1 255.255.255.255
ip address 192.0.2.129 255.255.255.252
tunnel source Loopback100
tunnel destination 192.0.2.2
router ospf 100
network 192.0.2.129 0.0.0.0 area 0
ip address 192.0.2.2 255.255.255.255
ip vrf forwarding
ip address 192.0.2.130 255.255.255.252
tunnel source Loopback101
tunnel destination 192.0.2.1
router ospf 101 vrf
network 192.0.2.130 0.0.0.0 area 0
However, this might not be an ideal solution for the data center as it routes all traffic thru a GRE tunnel. I will try the cross-over cable trick next.
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