Packet forwarding method in TRILL (transparent interconnection of lots of links) network and routing bridge

Abstract

The invention discloses a packet forwarding method in a TRILL (transparent interconnection of lots of links) network and a router bridge. Both an entrance RB (router bridge) and an exit RB distribute local unique labels for local ports, and an MAC (media access control) address of a local host and the labels distributed for the local ports are learnt into local MAC address table entries; an MAC address table entry corresponding to a target MAC address of a packet to be forwarded from the local host is searched by the entrance RB in a local MAC address table, TRILL encapsulation including the entrance RB, the entrance label, the exit RB and the exit label is performed for the packet to be forwarded according to search results, and the encapsulated TRILL packet is sent to the exit RB; TRILL decapsulation is performed by the exit RB for the TRILL packet, an inner layer source MAC address is learnt, the inner layer source MAC address, the entrance RB and the entrance label are learnt to the local MAC address table entries, and the decapsulated packet is forwarded according to the exit label. By adopting the method and the routing bridge, the packet forwarding based on the labels can be realized, the search of the MAC address table can be reduced, and the complexity of packet forwarding can also be reduced.

Description

technical field [0001] The present application relates to the field of communication technology, and in particular to a message forwarding method and a routing bridge in a Transparent Interconnection of Lots of Links (TRILL) network. Background technique [0002] TRILL is a connection layer (L2) network standard recommended by the Internet Engineering Task Force (IETF, Internet Engineering Task Force), which is used to solve the shortcomings of the Spanning Tree Protocol (STP, Spanning Tree Protocol) in large data centers. In the L2 network, STP avoids loops by blocking redundant links, but at the same time it also causes a waste of redundant link bandwidth, while TRILL routes intermediate systems to intermediate systems (ISIS, Intermediate system to intermediate system) The introduction of the protocol into the L2 network not only solves the L2 loop problem, but also supports redundant paths and load sharing. [0003] In a TRILL network, a device running the TRILL protocol...

AI Technical Summary

Problems solved by technology

However, since the MAC address table is very large, the process of finding the MAC address may be very long, which not only prolongs the packet forwarding time, but also increases the forwarding complexity

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