Method and switch for sending multicast message

Abstract

The invention discloses a method for sending a multicast message and a switch. The method includes receiving a multicast message from a first user equipment or a second user equipment, wherein the first user equipment is single-homed to the first switch, The second user equipment multi-active accesses N switches including the first switch; determines the designated multicast tree of the first switch, and the designated multicast tree is pre-designated from the N multicast trees that have been generated in the network, and N The switches belong to N different designated multicast trees respectively; the multicast message is encapsulated, and the unique identification address of the destination switch in the head of the encapsulated multicast message is the unique address of the root of the designated multicast tree of the first switch. Identifying the address; forwarding the encapsulated multicast message to the network side through the designated multicast tree of the first switch. Through the above method, the present invention can realize that the multicast message sent by the second user equipment does not return to the second user equipment itself through a loop without requiring a special chip.

Description

technical field [0001] The invention relates to the field of network technology, in particular to a method and switch for sending multicast messages. Background technique [0002] Transparent Interconnection of Lots of Links (English: Transparent Interconnection of Lots of Links, abbreviation: TRILL) is a new protocol for building a large-scale two-layer network. In the TRILL active-active scenario, user equipment (English: Customer Edge, Abbreviation CE) connects two routing bridges (English: Routing Bridge, abbreviation: RB) RB1 and RB2 for active-active networking. At this time, after the multicast packet sent by CE is encapsulated by RB1, it may be sent by RB1 to RB2, and then decapsulated by RB2 before being sent to the CE device. In this way, the CE device will receive the packets sent by itself, which will cause the circulation of multicast packets on the network, resulting in a waste of network resources. Therefore, this situation needs to be avoided. [0003] In ...

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Problems solved by technology

[0004] However, the inventors of the present application found in the research and development that the above scheme requires that the RB can encapsulate different nicknames in the source-routing-bridge nickname of the TRILL header when TRILL-encapsulating the multicast packet based on the source port, which has special effects on the chip. Requirements, when there are many dual-homing groups (that is, when one CE is connected to two RBs), more nicknames are required to be supported by RBs, which is difficult for current commercial chips to support.

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