Packet processing method, access device, and communication system

An access device, comprising:

• at least two network ports, configured to connect devices on a network side;
• a user port, configured to connect a user terminal;
• an identifying unit, configured to identify a protocol type of a multicast packet received from a first network port;
• and
• a processing unit, configured to, when the multicast packet is a virtual router redundancy protocol packet, send the virtual router redundancy protocol packet via a second network port to the network side according to a snooping port list;
• and when the multicast packet is a non-virtual router redundancy protocol packet, send the non-virtual router redundancy protocol packet via the user port to a user side, wherein the snooping port list is recorded with port information comprising information of the first network port and information of the second network port.

A communication system, comprising:

• an access device, wherein the access device is set with a first network port and a second network port;
• and
• the access device is configured to receive a multicast packet from a network side via the first network port;
• identify a protocol type of the multicast packet, and if the multicast packet is a virtual router redundancy protocol packet, send the virtual router redundancy protocol packet via the second network port to the network side according to a snooping port list;
• and if the multicast packet is a non-virtual router redundancy protocol packet, send the non-virtual router redundancy protocol packet via a user port to a user side, wherein the snooping port list is recorded with port information comprising information of the first network port and information of the second network port.