Packet sending and processing method and apparatus, pe node, and node

A packet processing method, comprising:

• receiving a first packet sent by a provider edge (PE) node, wherein the PE node processes a second packet received from a first access circuit (AC) to obtain the first packet and the first packet comprises a first internet protocol (IP), wherein the first IP comprises a second IP or an IP obtained by through encrypting part bits of the second IP with an intrinsic entropy value of the second packet, wherein the second IP is one of an Ethernet segment identifier (ESI) IP of an ESI corresponding to the first AC, an IP obtained from a modification to a designated bit of the ESI IP of the ESI corresponding to the first AC according to a Root/Leaf attribute of the first AC, an IP obtained from replacement of part bits of the ESI IP of the ESI corresponding to the first AC with a virtual local area network identifier (VLAN ID) value corresponding to the first AC, a third IP, or an IP obtained from a modification to a designated bit of the third IP according to the Root/Leaf attribute of the first AC, wherein the ESI corresponding to the first AC is an ESI bound to a main interface to which the first AC belongs, the ESI IP of the ESI is an IP address corresponding to the ESI, the VLAN ID value corresponding to the first AC is configured in the first AC and used for matching the second packet, and the third IP is determined through a PE node where the first AC is located and a local index of the ESI corresponding to the first AC on the PE node or determined through a virtual private network (VPN) domain to which the PE node where the first AC is located belongs and the local index of the ESI corresponding to the first AC on the PE node;
• and
• processing the first packet according to an ESI value corresponding to the first IP comprised in the first packet or performing ESI filtering on the first packet according to the second IP and configuration information on a receiver receiving the first packet.

A provider edge (PE) node, comprising:

• a communication interface configured to receive a first packet from an access circuit (AC);
• and
• a processor configured to process the first packet to obtain at least one second packet, wherein each of the at least one second packet comprises a first internet protocol (IP), wherein the first IP comprises a second IP or an IP obtained from encryption part bits of the second IP with an intrinsic entropy value of the first packet;
• and the second IP is one of an Ethernet segment identifier (ESI) IP of an ESI corresponding to the AC, an IP obtained from a modification to a designated bit of the ESI IP of the ESI corresponding to the AC according to a Root/Leaf attribute of the AC, an IP obtained from replacement of part bits of the ESI IP of the ESI corresponding to the AC with a virtual local area network identifier (VLAN ID) value corresponding to the AC, a third IP, or an IP obtained from a modification to a designated bit of the third IP according to the Root/Leaf attribute of the AC, wherein the ESI corresponding to the AC is an ESI bound to a main interface to which the AC belongs, the ESI IP of the ESI is an IP address corresponding to the ESI, the VLAN ID value corresponding to the AC is configured in the AC and used for matching the first packet, and the third IP is determined through a PE node where the AC is located and a local index of the ESI corresponding to the AC on the PE node or determined through a virtual private network (VPN) domain to which the PE node where the AC is located belongs and the local index of the ESI corresponding to the AC on the PE node,
• wherein the communication interface is further configured to send each of the at least one second packet.

A node, comprising:

• a communication interface configured to receive a first packet sent by a provider edge (PE) node, wherein the PE node processes a second packet received from an access circuit (AC) to obtain the first packet and the first packet comprises a first internet protocol (IP), wherein the first IP comprises a second IP or an IP obtained from encryption part bits of the second IP with an intrinsic entropy value of the second packet;
• and the second IP is one of an Ethernet segment identifier (ESI) IP of an ESI corresponding to the AC, an IP obtained from a modification to a designated bit of the ESI IP of the ESI corresponding to the AC according to a Root/Leaf attribute of the AC, an IP obtained from replacement of part bits of the ESI IP of the ESI corresponding to the AC with a virtual local area network identifier (VLAN ID) value corresponding to the AC, a third IP, or an IP obtained from a modification of a designated bit of the third IP according to the Root/Leaf attribute of the first AC, wherein the ESI corresponding to the AC is an ESI bound to a main interface to which the AC belongs, the ESI IP of the ESI is an IP address corresponding to the ESI, the VLAN ID value corresponding to the AC is configured in the AC and used for matching the second packet, and the third IP is determined through a PE node where the AC is located and a local index of the ESI corresponding to the AC on the PE node or determined through a virtual private network (VPN) domain to which the PE node where the AC is located belongs and the local index of the ESI corresponding to the AC on the PE node;
• and
• a processor configured to process the first packet according to an ESI value corresponding to the first IP comprised in the first packet or perform ESI filtering on the first packet according to the second IP and configuration information on a receiver receiving the first packet in the case where the first IP comprises the second IP.

A packet processing system, comprising a first node and a second node,

• wherein the first node is configured to receive a first packet from an access circuit (AC) and process the first packet to obtain at least one second packet, and send the at least one second packet to the second node, wherein each of the at least one second packet comprises a first internet protocol (IP), which comprises a second IP or an IP obtained from encryption of part bits of the second IP with an intrinsic entropy value of the first packet;
• wherein the second IP is one of:
• an Ethernet segment identifier (ESI) IP of an ESI corresponding to the AC, an IP obtained from a modification to a designated bit of the ESI IP of the ESI corresponding to the AC according to a Root/Leaf attribute of the AC, an IP obtained from replacement of part bits of the ESI IP of the ESI corresponding to the AC with a virtual local area network identifier (VLAN ID) value corresponding to the AC, a third IP, or an IP obtained from a modification to a designated bit of the third IP according to the Root/Leaf attribute of the AC, wherein the ESI corresponding to the AC is an ESI bound to a main interface to which the AC belongs, the ESI IP of the ESI is an IP address corresponding to the ESI, the VLAN ID value corresponding to the AC is a VLAN ID value configured in the AC and used for matching the first packet, and the third IP is determined through a PE node where the AC is located and a local index of the ESI corresponding to the AC on the PE node or determined through a virtual private network (VPN) domain to which the PE node where the AC is located belongs and the local index of the ESI corresponding to the AC on the PE node;
• and
• wherein the second node is configured to process each of the at least one second packet according to an ESI value corresponding to the first IP comprised in each of the at least one second packet or perform ESI filtering on each of the at least one second packet according to the second IP and configuration information on a receiver receiving the each of the at least one second packet.