Packet transmission method and apparatus

Patent metadata

Field	Value
Publication number	US-11310081-B2
Application number	US-202017093207-A
Country	US
Kind code	B2
Filing date	Nov 9, 2020
Priority date	May 10, 2018
Publication date	Apr 19, 2022
Grant date	Apr 19, 2022

Abstract

This application provides a packet transmission method and apparatus. The method includes: receiving, by a first transmission device, a first VXLAN packet sent by a first service device through a first virtual extensible local area network VXLAN tunnel; determining, by the first transmission device, first egress information corresponding to a first BD and a first destination media access control MAC address, based on a correspondence between the first BD, the first destination MAC address, and the first egress information; generating, by the first transmission device, a second VXLAN packet based on the first VXLAN packet and the first egress information, where the second VXLAN packet includes a second VNI and an Ethernet frame; and sending, by the first transmission device sends the second VXLAN packet to a second transmission device through a second VXLAN tunnel. This application facilitates more flexible packet transmission.

First claim

What is claimed is:

1. A packet transmission method, comprising:
receiving, by a first transmission device, a first virtual extensible local area network (VXLAN) packet sent by a first service device through a first VXLAN tunnel, wherein the first VXLAN packet comprises a first VXLAN network identifier (VNI), the first VNI indicates that a broadcast domain (BD) to which the first VXLAN packet sent by the first service device through the first VXLAN tunnel belongs is a first BD, and the first transmission device and the first service device are located in a first data center (DC);
determining, by the first transmission device, first egress information corresponding to the first BD and a first destination media access control (MAC) address, based on a correspondence between the first BD, the first destination MAC address, and the first egress information, wherein the first destination MAC address indicates a destination address of an Ethernet frame contained in the first VXLAN packet, and the first egress information comprises a first virtual extensible local area network tunnel end point (VTEP) address and a second VNI;
generating, by the first transmission device, a second VXLAN packet based on the first VXLAN packet and the first egress information, wherein the second VXLAN packet comprises the second VNI and the Ethernet frame; and
sending, by the first transmission device, the second VXLAN packet to a second transmission device through a second VXLAN tunnel, wherein the second transmission device is located in a second DC, the second DC is different from the first DC, the first VTEP address indicates an address through which the second transmission device connects to the second VXLAN tunnel, and the second VNI indicates that a BD to which the second VXLAN packet sent by the first transmission device through the second VXLAN tunnel belongs is a second BD.

2. The method according to claim 1 , wherein the second VNI is the same as a third VNI, the third VNI is contained in a third VXLAN packet sent by the second transmission device to a second service device through a third VXLAN tunnel, the third VXLAN packet is generated by the second transmission device based on the second VXLAN packet, and the second transmission device and the second service device are located in the second DC.

3. The method according to claim 1 , wherein the second VNI is different from a third VNI, the third VNI is contained in a third VXLAN packet sent by the second transmission device to a second service device through a third VXLAN tunnel, the third VXLAN packet is generated by the second transmission device based on the second VXLAN packet, and the second transmission device and the second service device are located in the second DC.

4. The method according to claim 2 , wherein the method further comprises:
receiving, by the first transmission device, a first MAC/internet protocol (IP) advertisement route sent by the second transmission device, wherein the first MAC/IP advertisement route comprises the first destination MAC address and the second VNI; and
generating, by the first transmission device, the correspondence between the first BD, the first destination MAC address, and the first egress information, based on the first MAC/IP advertisement route.

5. The method according to claim 4 , wherein the method further comprises:
sending, by the first transmission device, a second MAC/IP advertisement route to the first service device, wherein the second MAC/IP advertisement route comprises the first destination MAC address and the first VNI.

6. The method according to claim 1 , wherein the method further comprises:
receiving, by the first transmission device, a first route that is sent by the first service device and that is reflected by a first route reflector (RR) and that is used to establish the first VXLAN tunnel, wherein the first RR is located in the first DC;
adding, by the first transmission device, the first VXLAN tunnel to a first split horizon group, wherein the first split horizon group is a split horizon group in the first DC;
receiving, by the first transmission device, a second route that is sent by the second transmission device and that is reflected by a second RR, and that is used to establish the second VXLAN tunnel, wherein the second RR is located outside the first DC; and
adding, by the first transmission device, the second VXLAN tunnel to a second split horizon group, wherein the second split horizon group is outside the first DC.

7. The method according to claim 1 , wherein the method further comprises:
determining, by the first transmission device based on the first VTEP address, that the second transmission device is located in the second DC.

8. A packet transmission apparatus, comprising:
a memory, wherein the memory comprises instructions; and
a processor configured to communicate with the memory, wherein the processor is configured to execute the instructions to:
receive a first virtual extensible local area network (VXLAN) packet sent by a first service device through a first VXLAN tunnel, wherein the first VXLAN packet comprises a first VXLAN network identifier (VNI), the first VNI indicates that a broadcast domain (BD) to which the first VXLAN packet sent by the first service device through the first VXLAN tunnel belongs is a first BD, and the packet transmission apparatus and the first service device are located in a first data center (DC);

determine first egress information corresponding to the first BD and a first destination media access control, MAC, address, based on a correspondence between the first BD, the first destination MAC address, and the first egress information, wherein the first destination MAC address indicates a destination address of an Ethernet frame contained in the first VXLAN packet, and the first egress information comprises a first virtual extensible local area network tunnel end point (VTEP) address and a second VNI, wherein
generate a second VXLAN packet based on the first VXLAN packet and the first egress information, wherein the second VXLAN packet comprises the second VNI and the Ethernet frame; and
send the second VXLAN packet to a second transmission device through a second VXLAN tunnel, wherein the second transmission device is located in a second DC, the first VTEP address indicates an address through which the second transmission device connects to the second VXLAN tunnel, and the second VNI indicates that a BD to which the second VXLAN packet sent by the packet transmission apparatus through the second VXLAN tunnel belongs is a second BD.

9. The apparatus according to claim 8 , wherein the second VNI is the same as a third VNI, the third VNI is contained in a third VXLAN packet sent by the second transmission device to a second service device through a third VXLAN tunnel, the third VXLAN packet is generated by the second transmission device based on the second VXLAN packet, and the second transmission device and the second service device are located in the second DC.

10. The apparatus according to claim 8 , wherein the second VNI is different from a third VNI, the third VNI is contained in a third VXLAN packet sent by the second transmission device to a second service device through a third VXLAN tunnel, the third VXLAN packet is generated by the second transmission device based on the second VXLAN packet, and the second transmission device and the second service device are located in the second DC.

11. The apparatus according to claim 9 , wherein the processor is further configured to execute the instructions to:
receive a first media access control MAC/internet protocol (IP) advertisement route sent by the second transmission device, wher

Assignees

• Huawei Tech Co Ltd

Inventors

• Gao Jun
• Gao Yuan
• Zeng Wanmei

Classifications

• H04L45/74

  Address processing for routing · CPC title

• H04L12/4675 Primary

  Dynamic sharing of VLAN information amongst network nodes (configuration of the network or of network elements H04L41/08) · CPC title

• H04L12/4633

  Interconnection of networks using encapsulation techniques, e.g. tunneling · 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