Patent ID: 9397931
Filing Date: 2016-07-19
CPC Classification: H04L

Claim Text:
1. A method comprising: determining, by a first provider edge network device to which a customer edge network device is singly-homed in a layer two segment of an Ethernet Virtual Private Network (EVPN), a segment identifier of the layer two segment; sending, by the first provider edge network device and using a layer three (L3) routing protocol, a route advertisement to advertise a route for the segment identifier to a second provider edge network device included in the EVPN; sending, by the first provider edge network device and to the second provider edge network device using the layer three L3 routing protocol, a route advertisement to advertise one or more media access control (MAC) routes for the layer two segment, wherein each of the MAC routes specifies at least one MAC address reachable through the customer edge network that is singly-homed to the first provider edge network device; responsive to determining a link failure between the first provider edge network device and the customer edge network device: learning, by the first provider edge network device and after flushing the one or more MAC routes, a new MAC route associated with the segment identifier.