Multicast packet forwarding method and device
A technology for multicasting packets and forwarding equipment, applied in the field of network communication, can solve problems such as prolonging time and increasing forwarding pressure of routing forwarding equipment, and achieves the effect of reducing pressure and shortening link time.
Active Publication Date: 2018-01-12
NEW H3C TECH CO LTD
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Problems solved by technology
[0010] It can be seen that in the existing PMTU discovery process, each routing and forwarding device needs to perform the above steps, which will increase the forwarding pressure of the routing and forwarding device, and will also prolong the discovery of the MTU value in the link from the multicast source to the destination. minimum link time
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[0037]In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0038] The method provided by the present invention optimizes the existing PMTU discovery process. Compared with the existing PMTU discovery process, it can reduce the pressure on routing and forwarding equipment, and shorten the link from the multicast source end to the destination end link with the smallest MTU value. time.
[0039] pass below figure 2 Describe the method provided by the invention;
[0040] see figure 2 , figure 2 The flow chart of the method provided by the present invention. Such as figure 2 As shown, the process may include the following steps:
[0041] Step 201, when the multicast source sends a multicast data message to the multicast group address, identify whether the local MTU value corresponding to the multicast...
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The application provides a multicast packet forwarding method and device. In the present invention, when the routing and forwarding device receives the multicast data message, it judges whether there is a multicast entry corresponding to the multicast group address carried by the multicast data message locally. When the multicast table entry corresponding to the group address is used, the outbound interface in the multicast table entry corresponding to the multicast group address can be directly used to forward the multicast data message, reducing the pressure on the routing forwarding device, and , the outgoing interface in the local multicast entry corresponding to the multicast group address is discovered based on the link with the smallest MTU value, which obviously shortens the time required to discover the MTU link from the multicast source to the destination end. The time of the link with the smallest value.
Description
technical field [0001] The invention relates to network communication technology, in particular to a multicast message forwarding method and equipment. Background technique [0002] In the IPv6 multicast forwarding process, each link passed from the multicast source to the destination may have a different maximum transmission unit (MTU: Maximum Transmission Unit), when the length of the multicast data packet is greater than the link MTU , if the multicast data packet can be fragmented according to the minimum value of the MTU of all links at the multicast source end, the processing pressure of the routing and forwarding equipment between the multicast source end and the destination end can be reduced, which is reasonable Make use of network resources. However, to achieve this effect, the key lies in how to find the link with the smallest MTU value from the links from the multicast source end to the destination end. Here, for ease of description, the link with the smallest ...
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IPC IPC(8): H04L12/741H04L12/761H04L45/74H04L45/16
Inventor 周坤鹏王超群
Owner NEW H3C TECH CO LTD