Bridge Virtual Interface (BVI), a virtual interface on a router that acts as a routed interface associated with a single bridge domain has been introduced. BVI serves as an L3 routed interface gateway between the bridge domain (L2 network) and L3VPN, enabling seamless traffic exchange. Incoming tagged packets from L2 subinterfaces are consolidated into the bridge domain, which uses the BVI to forward IP traffic to the L3VPN tunnel.

For more details, refer to the BVI Integration with L3VPN for VPLS/H-VPLS section in the OcNOS Multi-Protocol Label Switching Guide, Release 6.6.0.