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Method and device for forwarding multicast message

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

Active Publication Date: 2017-01-25
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 message
  • Method and device for forwarding multicast message
  • Method and device for forwarding multicast message

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Assume that the VLAN corresponding to the ingress interface 1 is VLAN1, and the opening mode of VLAN1 is the two-layer multicast mode; assuming that the egress interface of the multicast message is egress interface 1 on the switch 31 and egress 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 copies a multicast message, forwards by outgoing interface 1, simultaneously, in the multicast report After carrying the VLAN1 identifier in t...

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 present invention provides a multicast packet forwarding method and device, the method is applied in a stacking system including multiple forwarding units, and each forwarding unit performs: receiving the first group broadcast through any incoming interface According to the enabled mode of the VLAN corresponding to the incoming interface and the local preset multicast table entry, determine whether there is an outgoing interface for the first multicast packet in the local outgoing interface; if so, send the first multicast packet through the corresponding The outgoing interface forwards, and after carrying the VLAN ID in the first multicast message to form the second multicast message, forward it through each local stack port respectively; otherwise, carry the VLAN ID in the first multicast message to form the second multicast message Afterwards, each local stack port forwards the message to indicate the current forwarding unit that has received the second multicast message, and executes a series of forwarding processes. The invention realizes the forwarding of a single message between the stacking ports of the stacking system, and reduces the bandwidth consumption of the stacking ports.

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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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/761H04L12/46H04L12/741H04L12/947H04L45/16H04L45/74
Inventor 谢鑫淼
Owner RUIJIE NETWORKS CO LTD
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