Message forwarding method and gateways

Abstract

Provided in an embodiment of the present invention are a packet forwarding method and gateway, the method comprising: a first gateway receives a first Ethernet frame bearing an IP packet sent by a first virtual machine (VM), the Ethernet frame carrying a first source IP address field, a first source MAC address field, a first destination MAC address field and a first destination IP address field, the value of the first source IP address field being the IP address of the first VM, the value of the first source MAC address field being the MAC address of the first VM, the value of the first destination MAC address field being the identifier of a second gateway, and the value of the first destination IP address field being the IP address of a second VM; the first gateway changes the value of the first source MAC address field of the first Ethernet frame bearing an IP packet into an identifier of the first gateway so as to obtain a second Ethernet frame bearing an IP packet; the first gateway sends the second Ethernet frame bearing an IP packet to the second gateway. The present invention saves gateway resources and improves packet forwarding efficiency.

Description

technical field [0001] The embodiment of the present invention relates to the technical field of communication, and in particular to a message forwarding method and a gateway. Background technique [0002] Existing carrier networks have multi-tenant isolation requirements. Multiple tenants have parallel address spaces and do not affect each other. Generally, the data center (DC) networks included in different operators are different, and an operator can have multiple DC networks, and different DC networks can serve different tenants, while one A tenant can have multiple virtual machines (Virtual Machine, hereinafter referred to as VM), and multiple VMs can be distributed on different physical servers, and different physical servers may represent different DC networks, that is, the DC network is the network where the physical server is located. Multiple VMs can communicate through the tunnel established by the server. Since different physical servers use different tunneling ...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, when the gateway in the DC network forwards Ethernet frames between VMs, it needs to learn the Media Access Control (Media Access Control, hereinafter referred to as MAC) address of the sending VM and the receiving VM, especially when the gateway sends multiple Ethernet frames to the DC network. In the scenario where a VM sends Ethernet frames, the gateway needs to learn the MAC addresses of multiple VMs in the DC network, which leads to serious occupation of gateway resources in the DC network and low forwarding efficiency

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