Multihoming optimizations for fast failover in single-active networks

One or more non-transitory computer-readable media storing computer- executable instructions that, when executed by a processor, perform a method of providing redundant-link host multihoming in an Ethernet Virtual Private Network (EVPN) environment, the method comprising:

• detecting, by an active provider-edge network device, a loss of connectivity to one or more multihomed hosts, the one or more multihomed hosts being reachable via an ethernet segment (ES) through an ES link associated with an ES identifier;
• in response to detecting that the active provider-edge network device has lost connectivity to the ES link:
• performing, by the active provider-edge network device, a designated forwarding election algorithm to determine a new active provider-edge network device selected from one or more standby provider-edge network devices;
• and
• updating, at the active provider-edge network device, an entry in a forwarding table indicating that the one or more multihomed hosts are reachable by way of the active provider-edge network device via the ES link to indicate that the one or more multihomed hosts are reachable by way of the new active provider-edge network device via the ES link.

A system providing redundant-link host multihoming in an Ethernet Virtual Private Network (EVPN) environment, the system comprising:

• a processor;
• and
• one or more non-transitory computer-readable media storing computer-executable instructions that, when executed by the processor, perform a method comprising:
• detecting, by an active redundant provider-edge network device, a loss of connectivity to at least one multihomed host, the at least one multihomed host being reachable via an ethernet segment (ES) through an ES link associated with an ES identifier;
• in response to detecting that the active redundant provider-edge network device has lost connectivity to the ES link:
• performing, by the active redundant provider-edge network device, a designated forwarding election algorithm to determine a new active provider-edge network device selected from one or more standby provider-edge network devices;
• and
• updating, at the active redundant provider-edge network device, a generated route in a routing table indicating that the at least one multihomed host is reachable by way of the active provider-edge network device via the ES link to indicate that the at least one multihomed host is reachable by way of the new active provider-edge network device via the ES link.