Method for realizing upward link back-up

Abstract

The method configures more than one up going link for each IGMP proxy device, and sets up priority for each up going link. The method also includes following steps: (1) selecting main up going link based on usability and priorities of all up going links; and ensuring that the rest of up going link are as standby going links; (2) determining whether it is needed to select new main up going link; if yes, then executing step (3); otherwise, returning back to step (2); (3) selecting new main up going link based on usability and priorities of all standby up going links; then returning back to step (2). Comparing prior art, where only one up going link is available, the method prevents multicast users of using IGMP proxy device from unable to implement normal communication. Moreover, comparing with IGMP proxy device, which uses multiple up going links, the method reduces wastage of link bandwidth, and lowers consumption of system resources.

Description

technical field [0001] The invention relates to multicast technology, especially a method for realizing uplink backup on an Internet Group Management Protocol (IGMP) agent device. Background technique [0002] The multicast source or multicast router uses IGMP to manage the process of multicast users joining and leaving a multicast group, and the process of multicast users receiving multicast data packets from the multicast source or multicast router. In actual network implementation, not all multicast users are directly connected to multicast sources or multicast routers. Multicast users are often connected to multicast sources or multicast routers through network devices. Here, the network equipment includes Layer 2 and Layer 3 network equipment, wherein the Layer 2 network equipment is such as a Layer 2 Ethernet switch, and the Layer 3 network equipment is such as a router. Due to the different manufacturers of network devices, some support multicast routing protocols, a...

AI Technical Summary

Problems solved by technology

When only one uplink is configured, if the uplink is unavailable, all multicast users using the IGMP proxy device will be unable to receive multicast data packets, resulting in communication interruption

When multiple uplinks are configured on the IGMP proxy device, when a certain uplink is unavailable, the IGMP proxy device can ensure that multicast users can use multicast to communicate normally, but in this case, the actual The above is to receive the same multicast data message from the multicast source or multicast router, and copy them to the downlink connected to the multicast user, so that the multicast user actually receives multiple same multicast data packets. datagram

This not only consumes the bandwidth of multicast users, but also increases the system overhead of IGMP proxy equipment

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