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Data retransmission method and device

A forwarding method and data technology, applied in the field of communication, can solve the problem that IGMP Snooping cannot run normally

Inactive Publication Date: 2010-10-27
ZTE CORP
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  • Claims
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AI Technical Summary

Problems solved by technology

[0005] The present invention is proposed for the above-mentioned problem that IGMPSnooping cannot operate normally after QinQ technology or SVLAN technology is used on the device port. The present invention aims to provide an improved message forwarding scheme to solve the above-mentioned problems

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  • Data retransmission method and device
  • Data retransmission method and device

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Embodiment Construction

[0023] Functional Overview

[0024] As mentioned above, after the QinQ technology or SVLAN technology is used on the device port, the corresponding relationship between the active members and VLANs of the same multicast group originally maintained by IGMP Snooping is different, which leads to the failure of IGMP Snooping to run normally. Based on this, the present invention provides a message forwarding scheme. The basic idea of ​​the scheme is: according to the preset correspondence between the outer label and the forwarding port, forward the multicast message with the outer label added, and When all the multicast packets need to leave, the corresponding relationship between the outer label and the forwarding port is cleared, which overcomes the problem in the prior art that IGMP Snooping cannot run normally after QinQ technology or SVLAN technology is used on the device port, and then The multicast message can be forwarded normally, which fills the gap in the prior art.

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Abstract

The invention provides a data retransmission method and a device. The data retransmission method comprises the following steps: a retransmission port receives a multicasting message for requesting for joining the group, and sets the corresponding relation between the outer layer label and the retransmission port according to the multicasting address of the multicasting message and the identification of the retransmission port; and according to the corresponding relation, the retransmission port corresponding to the outer layer label retransmits data of the multicasting message. The invention overcomes the defect that IGMP Snooping can not normally operate after the equipment port uses QingQ or SVLAN technology in the prior art, so that the multicasting message can be retransmitted normally.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a data forwarding method and device. Background technique [0002] With the development of Ethernet in the metropolitan area network, problems related to user positioning and management are becoming more and more prominent. For example, there are only 4096 users for a layer-1 label packet, which cannot meet the current requirement. Therefore, operators propose QinQ (802.1Q-in-802.1Q) technology and virtual local area network (Selective Virtual Local Area Network, referred to as SVLAN) technology. [0003] IGMP Snooping (Internet Group Management Protocol Snooping, referred to as IGMP Snooping) is a multicast restriction mechanism running on Layer 2 Ethernet switches, and is used to manage and control multicast groups. When IGMP Snooping is not running, multicast packets will be broadcast at Layer 2. After running IGMP Snooping, packets will no longer be broadcast at Layer 2,...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L45/16
Inventor 王大鹏曾红李
Owner ZTE CORP
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