Packet processing method, device, and system

Patent metadata

Field	Value
Publication number	US-11218408-B2
Application number	US-202016879100-A
Country	US
Kind code	B2
Filing date	May 20, 2020
Priority date	Sep 22, 2015
Publication date	Jan 4, 2022
Grant date	Jan 4, 2022

Abstract

The present disclosure discloses a packet processing method, device, and system. The system includes: a controller, configured to: allocate a service label to a service processing manner of an FEC, establish a mapping relationship between the service label and the service processing manner, send the service label to a source node, and send the mapping relationship to a destination node; the source node, configured to: receive the service label sent by the controller, receive a first packet, insert the service label to the first packet to obtain a second packet, and send the second packet to the destination node; the destination node, configured to: receive the mapping relationship sent by the controller, receive the second packet sent by the source node, and pop the service label from the second packet according to the mapping relationship, to obtain the first packet.

First claim

What is claimed is:

1. A packet processing method, comprising:
allocating, by a controller, a service label to a service processing manner of a forwarding equivalence class (FEC), and establishing a mapping relationship between the service label and the service processing manner;
sending, by the controller, the service label corresponding to the FEC to a source node to enable the source node to insert the service label to a first packet corresponding to the FEC, to obtain a second packet;
wherein the service label instructs, in a process of forwarding the second packet from the source node to a destination node, a network device that performs service processing on the second packet to process the second packet in the service processing manner.

2. The method according to claim 1 , wherein:
the sending, by the controller, the service label corresponding to the FEC to a source node corresponding to the FEC to instruct the source node to insert the service label to a first packet corresponding to the FEC, to obtain a second packet comprises:
binding, by the controller, the service label to routing information corresponding to the FEC; and
sending, by the controller, the routing information bound with the service label to the source node to enable the source node to insert the service label to the first packet, to obtain the second packet.

3. The method according to claim 1 , wherein:
the sending, by the controller, the mapping relationship to the destination node corresponding to the FEC to enable the destination node to pop the service label from the second packet according to the mapping relationship, to obtain the first packet comprises:
inserting, by the controller, the service label and the service processing manner to network layer reachability information corresponding to the FEC, to form the mapping relationship between the service label and the service processing manner; and
sending, by the controller, the network layer reachability information to the destination node to enable the destination node to pop the service label from the second packet according to the mapping relationship, to obtain the first packet.

4. The method according to claim 1 , further comprising:
sending, by the controller, a next-hop address corresponding to the FEC to the source node to enable the source node to obtain a label switched path (LSP) label corresponding to the next-hop address and forward the second packet according to the LSP label; wherein
in a label stack of the second packet, the LSP label is an outer label, and the service label is an inner label.

5. A packet processing method, comprising:
receiving, by a source node, a service label corresponding to a forwarding equivalence class (FEC) sent by a controller, wherein the service label is allocated by the controller to a service processing manner of the FEC, and the source node is a source node corresponding to the FEC;
receiving, by the source node, a first packet corresponding to the FEC, and inserting the service label to the first packet, to obtain a second packet; and
sending, by the source node, the second packet to a destination node corresponding to the FEC; wherein
the service label instructs, in a process of forwarding the second packet from the source node to the destination node, a network device that performs service processing on the second packet to process the second packet in the service processing manner.

6. The method according to claim 5 , wherein the receiving, by a source node, a service label that is corresponding to an FEC and that is sent by a controller comprises:
receiving, by the source node, routing information corresponding to the FEC sent by the controller; and
obtaining, by the source node, the service label bound to the routing information.

7. The method according to claim 5 , further comprising:
receiving, by the source node, a next-hop address corresponding to the FEC sent by the controller, obtaining a label switched path (LSP) label corresponding to the next-hop address, and using the LSP label as an LSP label corresponding to the FEC; wherein
the second packet is forwarded according to the LSP label; and
in a label stack of the second packet, the LSP label is an outer label, and the service label is an inner label.

8. A controller, comprising:
a processor; and
a computer-readable storage medium storing a program to be executed by the processor, the program including instructions, when executed by the processor, cause the processor to:
allocate a service label to a service processing manner of a forwarding equivalence class (FEC);
establish a mapping relationship between the service label and the service processing manner;
send the service label corresponding to the FEC to a source node corresponding to the FEC to enable the source node to insert the service label to a first packet corresponding to the FEC, to obtain a second packet; and
send the mapping relationship to a destination node corresponding to the FEC to enable the destination node to pop the service label from the second packet according to the mapping relationship, to obtain the first packet; wherein
the service label instructs, in a process of forwarding the second packet from the source node to the destination node, a network device that performs service processing on the second packet to process the second packet in the service processing manner.

9. The controller according to claim 8 , wherein the program includes further instructions that, when executed, cause the processor to:
bind the service label to routing information corresponding to the FEC; and
send the routing information bound with the service label to the source node to enable the source node to insert the service label to the first packet, to obtain the second packet.

10. The controller according to claim 8 , wherein the program includes further instructions that, when executed, cause the processor to:
insert the service label and the service processing manner to network layer reachability information corresponding to the FEC, to form, in the network layer reachability information, the mapping relationship between the service label and the service processing manner; and
send the network layer reachability information to the destination node to enable the destination node to pop the service label from the second packet according to the mapping relationship, to obtain the first packet.

11. The controller according to claim 8 , wherein the program includes further instructions that, when executed, cause the processor to:
send a next-hop address corresponding to the FEC to the source node to enable the source node to obtain a label switched path (LSP) label corresponding to the next-hop address and forward the second packet according to the LSP label; wherein
in a label stack of the second packet, the LSP label is an outer label, and the service label is an inner label.

12. A source node device, comprising:
a processor; and
a computer-readable storage medium storing a program to be executed by the processor, the program including instructions that, when executed by the processor, cause the processor to:
receive a service label corresponding to a forwarding equivalence class (FEC) sent by a controller, wherein the service label is allocated by the controller to a service processing manner of the FEC, and the source node device is a source node corresponding to the FEC;
receive a first packet corresponding to the FEC, and inserting the service label to the first packet, to obtain a second packet; and
send the second packet to a destination node corresponding to the FEC; wherein
the service label instructs, in a process o

Assignees

• Huawei Tech Co Ltd

Inventors

• Zhuang Shunwan
• Li Zhenbin
• Chen Shuanglong
• Chen Guoyi
• Che Jia
• Wu Nan

Classifications

• H04L45/507 Primary

  Label distribution · CPC title

• H04L12/4641 Primary

  Virtual LANs, VLANs, e.g. virtual private networks [VPN] (LAN interconnection over a bridge based backbone H04L12/462; encapsulation techniques H04L12/4633; routing of packets H04L45/00; packet switches H04L49/00; virtual private networks for security H04L63/0272) · CPC title

• H04L45/50 Primary

  using label swapping, e.g. multi-protocol label switch [MPLS] · CPC title

• H04L47/825

  Involving tunnels, e.g. MPLS · CPC title

• H04L41/00

  Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks · CPC title