Patent ID: 8867367

Claim:
A method implemented in a provider edge switch (PE) for interworking an 802.1aq control plane with an Ethernet Virtual Private Network (EVPN) Border Gateway Protocol (BGP) control plane, the method comprising the steps of: receiving an Intermediate System-Intermediate System (IS-IS) protocol data unit (PDU) including an IS-IS Type Length Value (TLV) by the PE; determining whether the received IS-IS PDU requires a change in a configuration of designated forwarder (DF); determining whether the PE is still the DF for one or more Backbone-Virtual Local Area Network Identifiers (B-VIDs); and adding the DF associated network layer reachability information (NLRI) to a BGP database from an IS-IS database and local DF associated remote shortest path bridging media access control (MAC) mode (SPBM) sub tenants to the IS-IS database from the BGP database, in response to the PE becoming the DF for at least one B-VID.