Method and device for forwarding messages

Abstract

The invention discloses a method and device for forwarding messages. An ARP request message sent by a first VM is received by a first VTEP, a mapping request message is sent to a second VTEP through a mapping system, and a mapping relationship between an EID and an RLOC of a second VM under the second VTEP is requested; a mapping response message returned by the second VTEP is received by the first VTEP and the mapping relationship between the EID and the RLOC of the second VM is learned, wherein the EID is an MAC address, an IP address and a VNI of the second VM; the RLOC is an IP address of the second VTEP; the messages sent to the second VM by the first VM are received by the first VTEP, according to the stored mapping relationship between the EID and the RLOC of the second VM, VXLAN packaging is conducted on the messages, and the packaged messages are sent to the second VTEP and forwarded to the second VM through the second VTEP. The function that a VXLAN is operated efficiently under the condition that multicast is avoided is achieved.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a message forwarding method and equipment. Background technique [0002] In a cloud computing multi-tenant environment, each tenant needs to be allocated a logical network that can be well isolated from other logical networks. Logical network isolation is generally solved by virtual local area network (VLAN, Virtual Local Area Network) technology. In the IEEE802.1Q standard, since the maximum number of VLAN identifiers is 12 bits, the maximum number of VLANs within a certain range is only 4K. With the increasing demand for multi-tenancy in the cloud environment, 4K VLANs can no longer meet the needs of large-scale network deployment in data centers. In addition, in a cloud computing environment, workloads often need to be migrated among multiple data centers and multiple cloud platforms, while the current IP subnet-based zoning limits the application of Layer 2 co...

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Problems solved by technology

[0017] From the above description, it can be seen that if the method of message forwarding across data centers in the existing technology is adopted, multicast needs to be deployed, and the VTEPs of the two data centers are added to the same multicast group. When connecting, because there is no open multicast, it cannot run; at the same time, it is inefficient to learn MAC through flooding and learning mechanism

[0018] Moreover, if plan 2 is adopted to implement message forwarding across data centers, a large number of IS-IS or BGP neighbors need to be established between VTEPs to dynamically maintain neighbor relationships. When the number of VTEPs is large, it is limited by IS-IS or BGP itself. Neighbor Specifications for

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