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Method and device for forwarding multicast messages

A technology of multicast message and forwarding method, which is applied in the field of communication, and can solve the problems of large number of multicast messages and low forwarding success rate of broadband resources at stack ports

Active Publication Date: 2014-04-23
RUIJIE NETWORKS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The embodiment of the present invention provides a method and device for forwarding multicast messages, which are used to solve the problem that the existing forwarding mode of multicast messages occupies more stack port broadband resources and has a low success rate of forwarding

Method used

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  • Method and device for forwarding multicast messages
  • Method and device for forwarding multicast messages

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Assume that the VLAN corresponding to the incoming interface 1 is VLAN1, and the opening mode of VLAN1 is the two-layer multicast mode; suppose that the outgoing interface of the multicast message is the outgoing interface 2 on the switch 31 and the outgoing interface 3 on the switch 33 (such as Figure 3B shown), then, the multicast message is forwarded through the following process:

[0072] After receiving the multicast message, the switch 31 determines that the opening mode of the VLAN1 corresponding to the ingress and egress interface 1 is a layer-2 multicast mode. According to the multicast group address of the multicast message, the locally preset layer 2 Query in the multicast table item, obtain the corresponding interface information (i.e. outgoing interface 1 and stack port 1) of the identification of VLAN1, at this moment, switch 31 duplicates a multicast message, forwards by outgoing interface 2, simultaneously, in the multicast report After carrying the VLA...

Embodiment 2

[0076] Assume that the VLAN corresponding to the incoming interface 1 (such as the incoming interface is the SVI interface) is VLAN1, and the opening mode of the VLAN1 is the three-layer multicast mode; the outgoing interface of the multicast message is assumed to be the SVI outgoing interface 3 on the switch 31 (corresponding to The VLAN is VLAN2) and the SVI outgoing interface 4 on the switch 32 (such as Figure 3C As shown, the VLAN corresponding to the SVI outgoing interface 4 is VLAN2), then, the multicast message is forwarded through the following process:

[0077] After receiving the multicast message, the switch 31 determines that the opening mode of VLAN1 corresponding to the ingress and egress interface 1 is a layer-3 multicast mode. According to the multicast group address of the multicast message, the locally preset layer-3 Query in the multicast table item, obtain SVI outgoing interface 3 as one of the outgoing interfaces, at this time, switch 31 copies a multicas...

Embodiment 3

[0081] Assume that the VLAN corresponding to the incoming interface 1 (for example, the incoming interface is an SVI interface) is VLAN1, and the opening mode of VLAN1 is the two-layer and three-layer mixed multicast mode; assuming that the outgoing interface of the multicast message is the two-layer outgoing interface on the switch 31 5 and SVI outgoing interface 6 (the corresponding VLAN is VLAN2), and SVI outgoing interface 7 on the switch 32 (such as Figure 3D As shown, the VLAN corresponding to the SVI outgoing interface 7 is VLAN2), then, the multicast message is forwarded through the following process:

[0082] After receiving the multicast message, the switch 31 determines that the opening mode of the VLAN1 corresponding to the ingress and egress interface 1 is the mixed multicast mode of the second and third layers, and first presets it locally according to the multicast group address of the multicast message. Query in the Layer 2 multicast table entry of VLAN1 to ob...

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Abstract

The embodiment of the invention provides a method and a device for forwarding multicast messages. The method is applied to a stacking system including a plurality of forwarding units. Each forwarding unit implements the following steps: receiving a first multicast message through any entrance interface, and judging whether local exit interfaces include exit interfaces of the first multicast message according to the open mode of a VLAN corresponding to the entrance interface and a locally-preset multicast table entry; forwarding the first multicast message through corresponding exit interfaces if the local exit interfaces include exit interfaces of the first multicast message, and carrying a VLAN identifier in the first multicast message to form a second multicast message and forwarding the second multicast message through each local stacking port; and carrying a VLAN identifier in the first multicast message to form a second multicast message and forwarding the second multicast message through each local stacking port to instruct the current forwarding unit receiving the second multicast message to perform a series of forwarding processes if the local exit interfaces do not include exit interfaces of the first multicast message. Forwarding of a single message among the stacking ports of the stacking system is realized, and bandwidth consumption of the stacking ports is reduced.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for forwarding multicast messages. Background technique [0002] A stacking system refers to the connection of more than one forwarding unit through their respective stacking ports (ie, stacking ports) to form a "logical device", that is, to operate as a logical switching entity, so that users pass through this "logical device". Device" to manage all the switching devices in the "logical device". [0003] Specifically, the above-mentioned forwarding unit can be set on the switching chip, at this time, the above-mentioned stacking system is composed of multiple switching chips; it can also be set on the switching device, at this time, the above-mentioned stacking system is composed of multiple switching devices ; It can also be set on the switching line card. At this time, the above-mentioned stacking system is composed of multiple switching line cards ...

Claims

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Application Information

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IPC IPC(8): H04L12/761H04L12/46H04L12/741H04L12/947H04L45/16H04L45/74
Inventor 谢鑫淼
Owner RUIJIE NETWORKS CO LTD
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