Reverse path forwarding inspection method and device

A technology of reverse path forwarding and checking method, applied in the field of communication, can solve problems such as RPF checking failure, affecting multicast message forwarding, long synchronization time of unicast routing, etc., and achieves the effect of avoiding checking failure

Active Publication Date: 2013-02-27
XINHUASAN INFORMATION TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when a network device fails and the unicast routes need to be resynchronized, due to the large number of unicast routes in the unicast routing table, the unicas...

Method used

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  • Reverse path forwarding inspection method and device
  • Reverse path forwarding inspection method and device
  • Reverse path forwarding inspection method and device

Examples

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Embodiment Construction

[0027] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0028] An embodiment of the present invention provides a reverse path forwarding check method, which is applied to a network device (such as routers and switches, etc.), such as figure 2 As shown, the method includes:

[0029] In step 201, the unicast routing management module notifies the multicast routing management module of the information that the unicast routing will fail to synchronize after learning that the unicast routing synchronization time is greater than the preset time (which can be set according to the actual experience value) event. ; Wherein, the event that the synchronization time of the unicast route is greater than the preset time includes but is not limited to: a GR (Graceful Restart, smooth restart) event or an active / standby switchover event.

[0030] In the embodiment of the present invention, by analyzing the unicast routin...

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Abstract

The invention discloses a reverse path forwarding inspection method and a reverse path forwarding inspection device. The method comprises the following steps: a unicast routing management module informs a multicast routing management module about the information on unicast routing synchronous failure, after knowing an event that the unicast routing synchronization time is larger than the preset time; the multicast routing management module backups unicast routing corresponding to reverse path forwarding (RPF) inspection after knowing the information on unicast routing synchronous failure; and after synchronization failure of the unicast routing corresponding to the RPF inspection, the multicast routing management module performs RPF inspection by utilizing the backup unicast routing. According to the reverse path forwarding inspection method and the reverse path forwarding inspection device, the RPF inspection failure can be avoided after the event that the unicast routing synchronization time is larger than the predetermined time occurs.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a reverse path forwarding checking method and equipment. Background technique [0002] like figure 1 As shown in , it is a schematic diagram of a multicast network. In a multicast network, the destination address field of an IP packet (multicast packet) is a multicast group address, and the multicast source is directed to the address identified by this multicast group address. Groups send multicast packets; therefore, network devices on the forwarding path often need to forward multicast packets received from one incoming interface to multiple outgoing interfaces in order to send multicast packets to multiple receivers. [0003] In the prior art, in order to process the same multicast information from different peers received by the same network device on different interfaces, it is necessary to perform RPF (Reverse Path Forwarding, reverse path forwarding) check on the i...

Claims

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Application Information

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IPC IPC(8): H04L12/26H04L12/703H04L45/28
Inventor 王伟
Owner XINHUASAN INFORMATION TECH CO LTD
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