Systems and methods for convergence of network traffic after an interruption of a network device's link

An apparatus comprising:

• a memory configured to store a forwarding table;
• communication circuitry configured to:
• receive, from a first network device, a first ethernet virtual private network (EVPN) auto discovery (AD) route that comprises an ethernet segment (ES) identifier (ESI), wherein the first network device is directly connected to the ES;
• receive, from a second network device, a second EVPN AD route that comprises the ESI, wherein the second network device is directly connected to the ES;
• receive an IP route from the first network device for the host on the ES;
• and
• receive, from the second network device, a withdrawal of the first EVPN AD route;
• and
• control circuitry configured to:
• create an ESI status flag indicating that a host on the ES is reachable via the first network device and the second network device;
• generate, in the forwarding table, an entry based on the IP route based on determining that the ESI status flag indicates that the host on the ES is reachable via the first network device;
• update the ESI status flag to indicate that the host on the ES is reachable via the second network device based on the withdrawal of the first EVPN AD route;
• and
• update the entry that was based on the IP route to prevent sending traffic to the host via the first device.

A non-transitory computer-readable medium having instructions encoded thereon that when executed by control circuitry cause the control circuitry to:

• receive, from a first network device, a first ethernet virtual private network (EVPN) auto discovery (AD) route that comprises an ethernet segment (ES) identifier (ESI), wherein the first network device is directly connected to the ES;
• receive, from a second network device, a second EVPN AD route that comprises the ESI, wherein the second network device is directly connected to the ES;
• create an ESI status flag indicating that a host on the ES is reachable via the first network device and the second network device;
• receive a MAC/IP route from the first network device for the host on the ES;
• generate, in a forwarding table, an entry based on the IP route based on determining that the ESI status flag indicates that the host on the ES is reachable via the first network device;
• receive, from the second network device, a withdrawal of the first EVPN AD route;
• update the ESI status flag to indicate that the host on the ES is reachable via the second network device based on the withdrawal of the first EVPN AD route;
• and
• update the entry that was based on the IP route to prevent sending traffic to the host via the first device.