Packet processing method, forwarding plane device and network device

A forwarding plane device applied to a broadband remote access server (BRAS), wherein the forwarding plane device comprises:

• a memory configured to store instructions;
• and
• one or more processors coupled to the memory and configured to execute the instructions to:
• transmit, to a control plane device that is communicatively coupled to and separated from the forwarding plane device, a request for allocating a first Internet (IP) address to a first user;
• receive, from the control plane device, a response including the first IP address;
• transmit, to the first user, the first IP address to enable the first IP address to be included in a first data packet from the first user;
• receive, from the control plane device, a forwarding rule, wherein the forwarding rule enables the forwarding plane device to forward a second data packet from a second user;
• receive, from the second user, the second data packet comprising an identity of the second user;
• and
• transmit the second data packet according to the identity and the forwarding rule,
• wherein the identity comprises both a media access control (MAC) address and a virtual local area network (VLAN) identifier.

A method, comprising:

• receiving, by a control plane device, a request for allocating a first Internet Protocol (IP) address to a first user;
• allocating, by the control plane device and in response to receiving the request, the first IP address to the first user;
• transmitting, by the control plane device, a response including the first IP address;
• transmitting, by a forwarding plane device to the control plane device, the request, wherein by the forwarding plane device is applied to a broadband remote access server (BRAS) and is communicatively coupled to and separated from the control plane device;
• receiving, by the forwarding plane device and from the control plane device, the response;
• transmitting, by the forwarding plane device and to the first user, the first IP address to enable the first IP address to be included in a first data packet from the first user;
• generating, by the control plane device, a forwarding rule, wherein the forwarding rule enables the forwarding plane device to forward a second data packet from a second user;
• sending, by the control plane device and to the forwarding plane device, the forwarding rule;
• receiving, by the forwarding plane device and from the second user, the second data packet comprising an identity of the second user;
• and
• transmitting, by the forwarding plane device, the second data packet according to the identity and the forwarding rule, and
• wherein the identity comprises both a media access control (MAC) address and a virtual local area network (VLAN) identifier.