Provider edge device and method implemented thereon for ethernet virtual private network

A method implemented at a second provider edge (PE) device in an Ethernet virtual private network (EVPN), the method comprising:

• performing label assignment procedure with a first PE device such that the first and second PE devices share an Ethernet segment identifier (ESI)-excluded label and know a correspondence between the ESI-excluded label and a label combination of an ESI label and a VPN label;
• receiving, from the first PE device, a packet of broadcast, unknown unicast or multicast (BUM) traffic that comprises the ESI-excluded label instead of the label combination;
• determining the ESI-excluded label from the packet of BUM traffic;
• and
• flooding the packet of BUM traffic according to the ESI-excluded label.

A first provider edge (PE) device in an Ethernet virtual private network (EVPN), the first PE device comprising:

• a processor;
• and
• a memory, the memory containing instructions executable by the processor, whereby the first PE device is operative to:
• perform label assignment procedure with a second PE device such that the first and second PE devices share an Ethernet segment identifier (ESI)-excluded label and know a correspondence between the ESI-excluded label and a label combination of an ESI label and a VPN label;
• encapsulate a packet of broadcast, unknown unicast or multicast (BUM) traffic, with the ESI-excluded label instead of the label combination;
• and
• send the encapsulated packet to the second PE device.

A second provider edge (PE) device in an Ethernet virtual private network (EVPN), the second PE device comprising:

• a processor;
• and
• a memory, the memory containing instructions executable by the processor, whereby the second PE device is operative to:
• perform label assignment procedure with a first PE device such that the first and second PE devices share an Ethernet segment identifier (ESI)-excluded label and know a correspondence between the ESI-excluded label and a label combination of an ESI label and a VPN label;
• receive, from the first PE device, a packet of broadcast, unknown unicast or multicast (BUM) traffic that comprises the ESI-excluded label instead of the label combination;
• determine the ESI-excluded label from the packet of BUM traffic;
• and
• flood the packet of BUM traffic according to the ESI-excluded label.