Flow forwarding method, devices and system

Abstract

The invention discloses flow transmitting method, devices and system. The method comprises the following steps of: receiving port flows sent by each access switching device to a shared port group of a convergence switching device by the convergence and exchange device and detecting flows; when the convergence and exchange device judges the flow in a port exceeds a first preset threshold value, selecting ports with flows being smaller than a second threshold value in the shared port group; and migrating partial flows of ports with the flows exceeding the first preset threshold value to the selected ports with the flows being smaller than the second preset threshold value by the convergence switching device. A plurality of access switching devices are connected by the invention and share an uplink between the access switching devices and the convergence switching device, and flow control is realized through the flow migration among the ports by the convergence switching device, thereby further improving the loading capacity of the system to flow emergencies.

Description

technical field [0001] The present invention relates to the field of network technology, in particular to a flow forwarding method, device and system. Background technique [0002] In the prior art, when a multimedia terminal accesses a network, a typical network structure is as follows: figure 1 shown. Multiple terminals must be connected to each access switch located at the access layer. In the scenario of monitoring access, the terminal can be an encoder EC (Encoder) ( figure 1 Take the monitoring scenario as an example); in the scenario of video products, the terminal can be a multimedia gateway, and the video stream reaches the aggregation switch at the aggregation layer through the access switch at the access layer. Regardless of the terminal in any scenario, there will be traffic bursts in the video stream. Traffic burst means that the traffic needs to occupy a relatively large bandwidth in an instant. The main causes include: image motion, inconsistent size of I f...

AI Technical Summary

Problems solved by technology

[0007] The disadvantage of this method is that IRF stacking technology is generally used for equipment expansion, and after each access switch is stacked, it performs full forwarding internally, that is to say, when traffic is forwarded, the traffic on the stacking line will be very large. Generally, optical fibers or dedicated stacking cables are required, and the investment is relatively large; figure 2 The two traffic flows are forwarded from the access switch A to the aggregation switch through the HASH algorithm

In addition, since the devices that can be stacked together must have the same manufacturer and device model, there are additional requirements for the existing access switches

Finally, after each access switch is stacked, it is equivalent to an access switch. Which uplink it chooses to forward is controlled by the HASH algorithm inside the access switch formed by the stack, and the outside world cannot control it; even if an uplink Due to congestion and packet loss, the stack group will not make adjustments, and the aggregation switch cannot dynamically balance the uplink traffic of each access switch through traffic monitoring and control methods.

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