Proxy advertisements in multihomed networks

A non-transitory computer-readable medium storing instructions, the instructions comprising:

• one or more instructions that, when executed by one or more processors of a network device, cause the one or more processors to:
• receive a first media access control (MAC)/Internet Protocol (IP) route advertisement,
• the first MAC/IP route advertisement identifying a MAC route relating to a customer edge device;
• generate and provide a MAC/IP route proxy advertisement based on the MAC route;
• detect a potential decrease in reliability of the MAC route after generating and providing the MAC/IP route proxy advertisement;
• broadcast a request to verify the reliability of the MAC route after detecting the potential decrease in reliability of the MAC route;
• determine, based on the request, whether the reliability of the MAC route has decreased;
• and
• perform one or more actions to cause a second MAC/IP route advertisement, that identifies the MAC route, to be provided based on determining that the reliability of the MAC route has not decreased.

A method, comprising:

• providing, by a first network device, a first media access control (MAC)/Internet Protocol (IP) route advertisement,
• the first MAC/IP route advertisement identifying a MAC route or a MAC and IP route,
• the MAC route, or the MAC and IP route, relating to an endpoint device;
• determining, by the first network device, that the MAC route, or the MAC and IP route, is aged out;
• determining, by the first network device and based on determining that the MAC route, or the MAC and IP route, is aged out, whether a second MAC/IP route advertisement is being provided by a second network device associated with the endpoint device,
• the second MAC/IP route advertisement identifying the MAC route or the MAC and IP route;
• and
• performing, by the first network device, an action to cause withdrawal of the first MAC/IP route advertisement, or to cause a MAC/IP route proxy advertisement relating to the MAC route, or the MAC and IP route, to be provided, based on determining whether the second MAC/IP route advertisement is being provided by the second network device.