Multicast tree management and scheduling method and device

A technology for managing devices and multicast trees, which is applied in the field of communication and can solve problems such as the unreasonable utilization of entry resources

Active Publication Date: 2014-04-23
NEW H3C TECH CO LTD
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  • Claims
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  • Multicast tree management and scheduling method and device
  • Multicast tree management and scheduling method and device
  • Multicast tree management and scheduling method and device

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[0028] In MVPN, the private network multicast traffic is carried on the public network MDT. That is to say, the private network multicast packets sent by the CE are re-encapsulated with a public network multicast packet header at the PE. The encapsulated message is equivalent to a multicast tunnel message. Since the multicast tunnel message uses the public network multicast address, it can smoothly pass through each P device in the public network MDT and decapsulate after reaching the peer PE to obtain the original The private network multicast packet is sent to the peer CE device.

[0029] The biggest advantage of using Default MDT in MVPN is that the multicast status on the public network is stable, but the biggest disadvantage is low bandwidth utilization. When the multicast traffic is relatively large, useless multicast streams will uselessly consume bandwidth on some branches of the multicast distribution tree because there are no receivers on those branches. In the subs...

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Abstract

The invention provides a multicast tree management and scheduling method and a device. The scheme is a scheme of linkage of a PE and an SDN controller. The processing process of the PE side comprises that: number AME_Num of available public network multicast routing table items on the PE device is sent to the SDN controller; when a private network multicast meets a predetermined switching condition, a switching application is initiated to the SDN controller, and when a switching notice of the SDN controller is received, the private network multicast is switched from Default MDT to DATA MDT to load; the processing of the SDN control side comprises: the AME_Num sent by the PE device or a P device is received and stored; when the switching application of the PE device is received, whether the current minimum AME_Num is 0 is judged; and if the current minimum AME_Num is not 0, the switching notice is sent to the PE device. With matching of the PE and the SDN controller, a problem of forwarding impassability of multicast flow after switching of the PE to DATA MDT can be avoided.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a multicast tree management and scheduling method and device. Background technique [0002] In the IP network, the development of multicast technology has a considerable history. After years of development of multicast routing-related protocols, the most popular protocol today is the PIM (Protocol Independent Multicast, Protocol Independent Multicast) protocol. The PIM protocol is divided into PIM SM (sparse mode) protocol and PIM DM (dense mode) protocol. With the development of technology, bidirectional PIM (Bidir-PIM, Bidirectional PIM) appeared later. Its basic principle is: use (*, G) entries for forwarding, without distinguishing the source address of multicast streams, and can forward messages from multiple multicast streams in the source direction. [0003] With the development of VPN technology, VPN users have more and more demands for multicast services ...

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Application Information

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IPC IPC(8): H04L12/761H04L12/753H04L12/46H04L45/16
Inventor 游君平
Owner NEW H3C TECH CO LTD
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