Dynamic designated forwarder election per multicast stream for evpn all-active homing

An apparatus comprising:

• multiple network ports to communicate with a network;
• and
• a processor of a first provider edge of a redundancy group including multiple provider edges that are configured with an Ethernet virtual private network (EVPN) segment identifier (EVI) and an Ethernet segment identifier (ESI) and that are multi-homed to a customer edge, wherein the processor is coupled to the network ports and configured to:
• upon receiving from the customer edge a join request that includes a group address for a multicast stream, elect a designated forwarder for the multicast stream in the redundancy group, wherein the processor is further configured to:
• compute for each provider edge a respective affinity for the designated forwarder as a mathematical function of at least a respective address of the provider edge, an identifier corresponding to the EVI, and the group address;
• determine which provider edge has a largest affinity among the affinities;
• and
• if the first provider edge has the largest affinity or does not have the largest affinity, configure the first provider edge as the designated forwarder or not configuring the first provider edge as the designated forwarder for the multicast stream, respectively.

A non-transitory computer readable medium encoded with instructions that, when executed by a processor of a first provider edge of a redundancy group including multiple provider edges that are configured with an Ethernet virtual private network (EVPN) segment identifier (EVI) and an Ethernet segment identifier (ESI) and that are multi-homed to a customer edge, cause the processor to perform:

• upon receiving from the customer edge a join request that includes a group address for a multicast stream, electing a designated forwarder for the multicast stream in the redundancy group, the electing including:
• computing for each provider edge a respective affinity for the designated forwarder as a mathematical function of at least a respective address of the provider edge, an identifier corresponding to the EVI, and the group address;
• determining which provider edge has a largest affinity among the affinities;
• and
• if the first provider edge has the largest affinity or does not have the largest affinity, configuring the first provider edge as the designated forwarder or not configuring the first provider edge as the designated forwarder for the multicast stream, respectively.