In inter-AS VPN Option B mode, ASBRs do not have VPN instances. If you want ASBRs to keep received VPNv4 routes, configure ASBRs not to filter VPNv4 routes based on VPN targets.
By default, an ASBR filters the VPN targets of only the received VPNv4 routes. The routes are imported into the routing table if they pass the filtration; otherwise, they are discarded. Therefore, if no VPN instance is configured on the ASBR or no VPN target is configured for the VPN instance, the ASBR discards all the received VPNv4 routes.
In inter-AS VPN Option B mode, the ASBR does not need to store VPN instance information, but must store information about all the VPNv4 routing information and advertise the routing information to the peer ASBR. In this situation, the ASBR needs to import all the received VPNv4 routes without filtering them based on VPN targets.
The system view of the ASBR is displayed.
The BGP view is displayed.
The BGP-VPNv4 address family view is displayed.
The function to filter VPNv4 routes based on VPN targets is disabled.
The configuration is committed.