Method, device, and system for determining generic routing encapsulation GRE tunnel identifier

A method for determining a Generic Routing Encapsulation (GRE) tunnel identifier, wherein the method is applied to a scenario in which there are at least two GRE tunnels between a hybrid access gateway (HAG) and a hybrid customer premises equipment (HCPE) and the at least two GRE tunnels are bonded, and the method comprises:

• determining, by the HCPE, a first GRE tunnel, wherein the first GRE tunnel is one of the at least two GRE tunnels;
• and
• sending, by the HCPE, a service packet to the HAG through the first GRE tunnel, wherein the service packet comprises a source IP address of the first GRE tunnel carrying the service packet, so that the HAG looks up a correspondence table according to the source IP address of the first GRE tunnel carrying the service packet, to determine a tunnel identifier of the first GRE tunnel carrying the service packet, wherein the correspondence table comprises a correspondence between the source IP address of the first GRE tunnel and the tunnel identifier of the first GRE tunnel, the source IP address of the first GRE tunnel is an IP address of a tunnel port that is of the first GRE tunnel and that is on the HCPE, and the tunnel identifier of the first GRE tunnel is used to uniquely indicate the first GRE tunnel.

A network device, wherein in a scenario in which there are at least two (GRE) tunnels between the network device and a hybrid customer premises equipment (HCPE) and the at least two GRE tunnels are bonded, the network device comprises:

• a receiving module, configured to receive a service packet that is sent by the HCPE through a first GRE tunnel, wherein the service packet comprises a source IP address of the first GRE tunnel carrying the service packet, and the first GRE tunnel is one of the at least two GRE tunnels;
• and
• a determining module, configured to look up a correspondence table according to the source IP address of the first GRE tunnel carrying the service packet received by the receiving module, to determine a tunnel identifier of the first GRE tunnel carrying the service packet, wherein the correspondence table comprises a correspondence between the source IP address of the first GRE tunnel and the tunnel identifier of the first GRE tunnel, the source IP address of the first GRE tunnel is an IP address of a tunnel port that is of the first GRE tunnel and that is on the HCPE, and the tunnel identifier of the first GRE tunnel is used to uniquely indicate the first GRE tunnel.

A network device, wherein in a scenario in which there are at least two GRE tunnels between the network device and a hybrid access gateway (HAG) and the at least two GRE tunnels are bonded, the network device comprises:

• a determining module, configured to determine a first GRE tunnel, wherein the first GRE tunnel is one of the at least two GRE tunnels;
• and
• a sending module, configured to send a service packet to the HAG through the first GRE tunnel determined by the determining module, wherein the service packet comprises a source IP address of the first GRE tunnel carrying the service packet, so that the HAG looks up a correspondence table according to the source IP address of the first GRE tunnel carrying the service packet, to determine a tunnel identifier of the first GRE tunnel carrying the service packet, wherein the correspondence table comprises a correspondence between the source IP address of the first GRE tunnel and the tunnel identifier of the first GRE tunnel, the source IP address of the first GRE tunnel is an IP address of a tunnel port that is of the first GRE tunnel and that is on the HCPE, and the tunnel identifier of the first GRE tunnel is used to uniquely indicate the first GRE tunnel.