Synchronizing dynamic host configuration protocol snoop information

An apparatus comprising:

• one or more processors;
• and
• at least one computer-readable storage medium having stored thereon instructions which, when executed by the one or more processors, cause the one or more processors to:
• perform dynamic host configuration protocol (DHCP) snooping of a first plurality of DHCP messages between a DHCP client and a DHCP server, wherein the apparatus is part of an ethernet segment for multihoming the DHCP client and wherein the DHCP snooping causes the one or more processors to;
• receive, by a first PE device, a DHCP offer message broadcasted by the DHCP server to the plurality of PE devices, wherein the DHCP offer message is directed to the DHCP client;
• determine, by the first PE device, that the DHCP offer message corresponds to a DHCP discover message forwarded by the first PE device from the DHCP client to the DHCP server;
• and
• send, by the first PE device, the DHCP offer message to the DHCP client;
• determine, based on the snooping of the first plurality of DHCP messages, an association between an internet protocol (IP) address corresponding to the DHCP client and a media access control (MAC) address corresponding to the DHCP client;
• and
• send, to at least one provider edge (PE) device in the ethernet segment, a first route advertisement that includes the association between the IP address corresponding to the DHCP client and the MAC address corresponding to the DHCP client, wherein the at least one PE device is configured to validate network traffic associated with the DHCP client.

A non-transitory computer-readable storage medium having stored thereon instructions which, when executed by one or more processors, cause the one or more processors to:

• perform, by a network device, dynamic host configuration protocol (DHCP) snooping of a first plurality of DHCP messages between a DHCP client and a DHCP server, wherein the network device is part of an ethernet segment for multihoming the DHCP client and wherein the DHCP snooping comprises:
• receiving, by a first PE device, a DHCP offer message broadcasted by the DHCP server to the plurality of PE devices, wherein the DHCP offer message is directed to the DHCP client;
• determining, by the first PE device, that the DHCP offer message corresponds to a DHCP discover message forwarded by the first PE device from the DHCP client to the DHCP server;
• and
• sending, by the first PE device, the DHCP offer message to the DHCP client;
• determine, based on the snooping of the first plurality of DHCP messages, an association between an internet protocol (IP) address corresponding to the DHCP client and a media access control (MAC) address corresponding to the DHCP client;
• and
• send, to at least one provider edge (PE) device in the ethernet segment, a first route advertisement that includes the association between the IP address corresponding to the DHCP client and the MAC address corresponding to the DHCP client, wherein the at least one PE device is configured to validate network traffic associated with the DHCP client.