Packet processing method and system, and device

Patent metadata

Field	Value
Publication number	US-10084702-B2
Application number	US-201514854872-A
Country	US
Kind code	B2
Filing date	Sep 15, 2015
Priority date	Mar 15, 2013
Publication date	Sep 25, 2018
Grant date	Sep 25, 2018

Abstract

The application disclose a packet processing method that includes: receiving, by a service distribution node, service routing information sent by a controller, where the service routing information includes a flow identifier, a service identifier, and a next-hop address, the flow identifier is used to identify a packet flow, the service identifier is used to identify a sequence of a service node instance that processes the packet flow, and the next-hop address is used to identify the service node instance that processes the packet flow; receiving a first packet; acquiring a first flow identifier according to the first packet, and searching the service routing information according to the first flow identifier to acquire a matched service identifier and a matched next-hop address; and sending a second packet to a first service node instance that has the matched next-hop address, which implements service processing on a packet flow.

First claim

What is claimed is:

1. A packet processing method, comprising:
receiving, by a service distribution node, service routing information sent by a controller, wherein the service routing information comprises a first flow identifier, a first service identifier, and a first next-hop address, and wherein the first flow identifier uniquely identifies a packet flow, the first service identifier is uniquely allocated to the packet flow, the first service identifier identifies a sequence of a plurality of service node instances that process the packet flow, and the first next-hop address identifies an address of a first service node instance of the plurality of service node instances that processes the packet flow;
receiving, by the service distribution node, a first packet;
acquiring, by the service distribution node, the first flow identifier according to the first packet, searching the service routing information according to the acquired first flow identifier to acquire the first service identifier and the first next-hop address from the service routing information; and
sending, by the service distribution node, a second packet to the first service node instance, wherein the second packet is formed by adding the first service identifier to the first packet.

2. A packet processing method, comprising:
receiving, by a first service node instance of a plurality of service node instances, service routing information sent by a controller, wherein the service routing information comprises a first service identifier and a first next-hop address, and wherein the first service identifier identifies a sequence of the plurality of service node instances that process a packet flow, and the first service identifier is uniquely allocated to the packet flow;
receiving, by the first service node instance, a first packet, wherein the first packet carries the first service identifier, and the first packet is comprised in the packet flow;
processing, by the first service node instance, the first packet to form a second packet, wherein the second packet carries the first service identifier;
searching, by the first service node instance, the service routing information according to the first service identifier to acquire the first next-hop address from the service routing information; and
sending, by the first service node instance, in response to determining that the first next-hop address is a reachable address, the second packet to a first device, wherein the first next-hop address identifies an address of the first device.

3. The method according to claim 2 , wherein the first packet is a first IP packet, the first next-hop address is a first next-hop IP address, and the sending, by the first service node instance, the second packet to a first device comprises:
searching, by the first service node instance, an address resolution protocol (ARP) table according to the first next-hop IP address to acquire a first media access control (MAC) address;
using, by the first service node instance, the first MAC address as a destination MAC address to perform Ethernet encapsulation on the second packet to form a first Ethernet packet; and
sending, by the first service node instance, the first Ethernet packet to the first device, wherein the first MAC address identifies the address of the first device.

4. The method according to claim 2 , wherein the first packet is a first Ethernet packet, the first next-hop address is a first next-hop IP address, and the sending, by the first service node instance, the second packet to a first device comprises:
searching, by the first service node instance, an address resolution protocol (ARP) table according to the first next-hop IP address to acquire a first media access control (MAC) address;
replacing, by the first service node instance, a destination MAC address in the second packet with the first MAC address to form a second Ethernet packet; and
sending, by the first service node instance, the second Ethernet packet to the first device, wherein the first MAC address identifies the address of the first device.

5. The method according to claim 2 , wherein the first packet is a first IP packet, the first next-hop address is a first next-hop media access control (MAC) address, and the sending, by the first service node instance, the second packet to a first device comprises:
using, by the first service node instance, the first next-hop MAC address as a destination MAC address to perform Ethernet encapsulation on the second packet to form a third Ethernet packet; and
sending, by the first service node instance, the third Ethernet packet to the first device, wherein the first next-hop MAC address identifies the address of the first device.

6. The method according to claim 2 , wherein the first packet is a first Ethernet packet, the first next-hop address is a first next-hop media access control (MAC) address, and the sending, by the first service node instance, the second packet to a first device comprises:
replacing, by the first service node instance, a destination MAC address in the second packet with the first next-hop MAC address to form a fourth Ethernet packet; and
sending, by the first service node instance, the fourth Ethernet packet to the first device, wherein the first next-hop MAC address identifies the address of the first device.

7. The method according to claim 2 , wherein the method further comprises:
searching, by the first service node instance, in response to determining that the first next-hop address is not a reachable IP address, a routing table according to a destination IP address in the second packet to acquire a second next-hop IP address, wherein the second next-hop IP address is a next-hop IP address that is in the routing table; and
sending, by the first service node instance, a third packet to a second device, wherein an address of the second device is identified by the second next-hop IP address, and wherein the third packet is formed by removing the first service identifier carried in the second packet.

8. The method according to claim 7 , wherein the first packet is a first IP packet, and the sending, by the first service node instance, a third packet to a second device comprises:
searching, by the first service node instance, an address resolution protocol (ARP) table according to the second next-hop IP address to acquire a first media access control (MAC) address, wherein the first MAC address is in the ARP table;
using, by the first service node instance, the first MAC address as a destination MAC address to perform Ethernet encapsulation on the third packet to form a fifth Ethernet packet; and
sending, by the first service node instance, the fifth Ethernet packet to the second device, wherein the first MAC address identifies the address of the second device.

9. The method according to claim 7 , wherein the first packet is a first Ethernet packet, and the sending, by the first service node instance, a third packet to a second device comprises:
searching, by the first service node instance, an address resolution protocol (ARP) table according to the second next-hop IP address to acquire a first media access control (MAC) address, wherein the first MAC address is in the ARP table;
replacing, by the first service node instance, a destination MAC address in the third packet with the first MAC address to form a sixth Ethernet packet; and
sending, by the first service node instance, the sixth Ethernet packet to the second device, wherein the first MAC address identifies the address of the second device.

10. The method according to claim 2 , wherein the first packet is an IP packet, the first next-hop address is a first next-hop media access control (MAC) ad

Assignees

• Huawei Tech Co Ltd
• Huawei Tech Co Ltd

Inventors

• Yan Changjiang

Classifications

• H04L45/64

  using an overlay routing layer · CPC title

• H04L61/2007

  Electricity · mapped topic

• H04L47/19

  at layers above the network layer (network arrangements for networked applications for scheduling or organising the servicing of application requests H04L67/60) · CPC title

• H04L45/38

  Flow based routing · CPC title

• H04L45/306 Primary

  Route determination based on the nature of the carried application · CPC title