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How to advertise routes to bgp peer from another vrf interface?

Hi,

Here is a topology: R1(e1/1) ----------(e1/1) R2 (e1/0) ---------(e1/0) R3
R1' AS is 1, R2' AS is 2 and R3' AS is 3
e1/0 in R2 and R3 are vrf DOC. e1/1 in R2 and R1 are normal interface
Can you give some suggestion how to configure the bgp between R1 and R2 in order for traffic to go from R3 to R1? Thank you

Below is a configuration example, but it is one vrf to another vrf. In my case, it is one vrf to global, which is different with the below example where several vrf route-target can exchange. If some specific vrf exchange route-target with the global, what is the global vrf value? Any expert can give some suggestion?
http://ideasdenetworking.blogspot.com/2015/03/enrutamiento-de-multiples-vrfs-route.html

arnold

You have to repeat the routes from r3 to the r1 and the same for r1 to r3.
You have static peering as you have right now with dynamic advertising about the learned routes.
You would need to filter which routes learned from r3 you want passed by r2 to r1.

router which is in use? Juniper, Cisco, etc.

arnold

See if the bgp readvertisment/redistribution of ospf sheds light on how you can configure the redistribution of a bgp learned
In the example in the link.

Presuming you are using a cisco router.
You can apply the info with the routers you have. Syntax/options might vary.
http://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/5242-bgp-ospf-redis.html

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My solution provides vrf route leaking as requested.