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basic MPLS VPN scenario

It's really basic topology with two VPN clients. I decided to use VRF CLIENT_A and VRF CLIENT_B; CLIENT_A is running OSPF and CLIENT_B is running BGP. There is another link between SW3 and SW2. I have configured sham-link to avoid it.


Something interesting and maybe a common mistake is when you configure the sham-links to use wrong "area id" and what would happen is that the routes in your fib table will appear as INTER-AREA routes instead of INTRA-AREA routes.


There is nothing specific about VRF CLIENT_B, anyway, if someone is digging and looking for some scenario maybe this picture will be useful.


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