Packet transmission method and proxy device for Internet group management protocol

Abstract

The invention discloses an IGMP message transmitting method comprising that an IGMP agent device receives IGMP adding messages from a host; the IGMP agent device obtains the multicast source address corresponding to the IGMP adding messages, searches a uni-cast routing table of itself according to the multicast source address to obtain an outgoing interface of the next hop; if the outgoing interface is an uplink interface of IGMP, the IGMP agent device sends out the IGMP adding messages through the outgoing interface; if the outgoing interface is not an uplink interface of IGMP, the IGMP agent device selects an interface from the IGMP uplink interfaces of itself and sends out the IGMP adding messages through the selected interface. The invention also discloses an IGMP agent device. The invention avoids rounding of multicast flows and realizes load-sharing between IGMP uplink interfaces.

Description

technical field [0001] The invention relates to the field of multicast technology, in particular to an Internet group management protocol IGMP message transmission method and an IGMP proxy device. Background technique [0002] Internet Group Management Protocol (IGMP, Internet Group Management Protocol) is a protocol responsible for IP multicast member management in the TCP / IP protocol suite, which is used to establish and maintain multicast membership relationships between IP hosts and multicast routers directly connected to them . The function realized by IGMP is bidirectional: on the one hand, the host informs the local router through the IGMP protocol that it wants to join and receive information of a specific multicast group; on the other hand, the router periodically queries a known group in the LAN through the IGMP protocol. Whether the members of the multicast group are active, that is, whether the network segment still has members belonging to a multicast group, so...

AI Technical Summary

Problems solved by technology

But there are following problems in this scheme: 1) although this method has played the effect of backup, when there are a plurality of multicast groups, the traffic of many multicast groups all passes through an uplink interface, does not realize between the uplink interfaces load sharing

2) There is a phenomenon of traffic bypass, which causes a waste of network resources, for example, in figure 2 In the example, when interface 1 is the main interface, the multicast traffic of 232.1.1.1 will pass through router A, then to router C, and then to router B

[0015] It can be seen that the existing solution does not solve the problem of load sharing of multiple IGMP uplink interfaces of the IGMP proxy device, and there is a problem of traffic bypass

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