Control RT for different network in MPLS

[wfqk]

Hi We know RT in MPLS controls network traffic. Can we say as long as two RT in two PE are same(import/export), the customer behind the PE can reach each other? Do we still need other condition? Thank you.

[Harold Ritter · Accepted solution]

Yes, that is correct. As long as the exported RT extended community on the sending PE is matched by the import RT value on the receiving PE, the information is imported on this same PE. The export value on both PE does not need to match. Neither does the import value.

Regards,

[Julio E. Moisa · Accepted solution]

Hi

As Harold mentioned, You can have the same RT (export/import) on each PE or the export can be different, The condition is that they should be over the same VRF.

For example:

PE01

ip vrf A

route-target export 1:100
route-target import 2:200

PE02

ip vrf A

route-target export 2:200
route-target import 1:100

Both PE's are exporting through differents export communities but they are importing the community from each other.  You could use the same RT communities (import/export) on both sides  to keep an order.

PE01

ip vrf A

route-target export 1:100
route-target import 1:100

PE02

ip vrf A

route-target export 1:100
route-target import 1:100

:-)