how that command works, and why it don't need to be configured on an ASBR that is functioning as RR?
Thank you very much for your support
This check is disabled by default on a VPNv4 RR because by definition it has to re-transmit to his clients any updates received from a MP-eBGP peer or another client.
If it was not the case, you have two choices:
- manually disable the check with the no bgp route-target filter all command
- Create a VRF for each VPN and manually import the routes