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Tuesday, July 27, 2010

Multi-VRF on the CE. How can we set up the server??

We are running BGP between the service provider PE and the CE. We have a customer which has 2 different VRFs. They wish to purchase a server at the CE end which should be able to talk to both the VRFs. We can only think of setting up the server with 2 different NIC port, each connected to 1 VRF and doing static routes. This is not scalable so is there any other setup that can be done on either the PE or the CE end? The CE on our end is a 3750G.


You don't have to have 2 NICs. You need to leak the VRFs together, so that resource (server) is shared between the 2 VRFs.

For example, on the CE route if you have vrf-a and vrf-b, you can configure vrf-c and add the server to vrf-c. Then you need to do export and import from vrf-a and vrf-b in to vrf-c and also from vrf-c to vrf-a and vrf-b.

Below is an example:

In this example vrf data and voice are imported into the dmz. dmz is the shared vrf and that is where you add the server vlan/subnet.

ip vrf data
rd 3:3
route-target export 3:3
route-target import 3:3
route-target import 5:5

ip vrf dmz
rd 5:5
route-target export 5:5
route-target import 5:5
route-target import 2:2
route-target import 3:3

ip vrf voice
rd 2:2
route-target export 2:2
route-target import 2:2
route-target import 5:5

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