Segmentation within a broadcast domain in ethernet VPN

A network apparatus, comprising:

• one or more processors;
• and
• one or more computer-readable non-transitory storage media coupled to the one or more processors and comprising instructions operable when executed by the one or more processors to cause the network apparatus to:
• receive a broadcast, unknown-unicast, or multicast (BUM) frame originated from a source network apparatus, the BUM frame being associated with a broadcast domain, wherein the BUM frame comprises a segment identifier identifying a segment within the broadcast domain;
• compare the segment identifier of the BUM frame to one or more second segment identifiers of one or more devices connected to the network apparatus;
• and
• forward a copy of the BUM frame to any of the one or more devices if the second segment identifier associated with that device matches the segment identifier of the BUM frame.

A method by a network apparatus, comprising:

• receiving a broadcast, unknown-unicast, or multicast (BUM) frame from a device connected to the network apparatus, wherein the BUM frame is associated with a broadcast domain;
• determining a first segment within the broadcast domain associated with the device;
• adding to the BUM frame a first segment identifier that uniquely identifies the first segment within the broadcast domain;
• and
• causing the BUM frame to be delivered to one or more recipient network apparatuses in a network associated with the broadcast domain, wherein the first segment identifier added to the BUM frame is configured to be used by the one or more recipient network apparatuses to selectively forward the BUM frame to connected devices that are associated with first segment identifier.