Message forwarding method and device for transparently connecting trill networks across multiple links

Abstract

The present application provides a packet forwarding method and device for transparently connecting a TRILL network across multiple links. In the present invention, the interface board of the gateway RB receives the TRILL-encapsulated message, performs TRILL decapsulation on the message, determines that the TRILL-decapsulated message is to be forwarded at Layer 3, and then decapsulates the TRILL-decapsulated message. The network board sent to the local RB performs Layer 3 forwarding, and the network board sends the packets that have completed Layer 3 forwarding to the corresponding interface board for forwarding. Finally, the packet forwarding across the multi-link transparent connection to the TRILL network is realized. In the present invention, the same gateway RB implements the three-layer access function of TRILL, and the whole process is only performed inside the gateway RB, without wasting any bandwidth resources, and achieving the purpose of wire-speed forwarding of messages.

Description

technical field [0001] The present application relates to network communication technology, in particular to a message forwarding method and device for a Transparent Interconnect of Lots of Links (TRILL: Transparent Interconnect of Lots of Links) network. Background technique [0002] At present, even if the hardware switching chip of the gateway node supports Layer 3 forwarding, the forwarding logic of the hardware switching chip does not allow Layer 3 forwarding and can only perform Layer 2 forwarding. [0003] for example, figure 1 In the shown network, the message sent by the PC is TRILL-encapsulated at the non-gateway node and reaches the gateway node. The gateway node performs TRILL decapsulation on the message and finds that the destination MAC address of the message is the MAC address of the gateway node. The gateway node forwards the packet at Layer 3, but it is limited to the forwarding logic of the hardware switch chip on the gateway node. Even if the hardware sw...

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Problems solved by technology

[0003] for example, figure 1 In the shown network, the message sent by the PC is TRILL-encapsulated at the non-gateway node and reaches the gateway node. The gateway node performs TRILL decapsulation on the message and finds that the destination MAC address of the message is the MAC address of the gateway node. The gateway node forwards the packet at Layer 3, but it is limited to the forwarding logic of the hardware switch chip on the gateway node. Even if the hardware switch chip of the gateway node supports Layer 3 forwarding, the gateway node can only forward the packet after decapsulation. Layer 2 Forwarding

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