- Visualizing a router. This is not about MPLS, although that is where the VRF concept comes from.
Example of routing beteen vrf-light using BTP http://packetlife.net/blog/2010/mar/29/inter-vrf-routing-vrf-lite/
- Once a router has VRF software the interface must be upgraded to support VRF.
- Sample Switch config with bgp and vrf.
Switch(config)# router bgp 800 Switch(config-router)# address-family ipv4 vrf vl2 Switch(config-router-af)# redistribute ospf 2 match internal Switch(config-router-af)# neighbor 184.108.40.206 remote-as 100 Switch(config-router-af)# neighbor 220.127.116.11 activate Switch(config-router-af)# network 18.104.22.168 mask 255.255.255.0 Switch(config-router-af)# exit
- Experienced problems where a router, connected to service provider MPLS using ospf area x, running vrf-lite, and connecting to area 0 on internal network would not show the area 0 routes.
- Problem was caused by ospf superbackbone rules that kicked in due to putting the ospf instance in a vrf
- Solution under ospf instance use command #capability vrf-lite