Transmission link switching method and device and network equipment
A technology of transmission link and switching device, applied in the field of communication, can solve problems such as slow switching speed, and achieve the effect of improving speed
Active Publication Date: 2015-04-22
RUIJIE NETWORKS CO LTD
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Problems solved by technology
However, due to the influence of factors such as the length of the packet sending interval and the response time of the peer end in this switching method, the switching speed is relatively slow.
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[0019] figure 1 It shows an application scenario in which a device accesses another device on another network segment through a Layer 3 forwarding device. exist figure 1 Among them, personal computer (Personal Computer, referred to as PC) 11 and port 1 on the layer-3 forwarding device 12 belong to the 1.1.1.0 / 24 network segment, and port 6 on the server 14 and the layer-3 forwarding device 13 belongs to 3.3.3.0 / 24 In the network segment, port 2 and port 3 on the layer-3 forwarding device 12 and port 4 and port 5 on the layer-3 forwarding device 13 belong to the network segment 2.2.2.0 / 24. PC11's access to server 14 belongs to cross-network segment access. There are two links for PC 11 to access server 14: one link formed by port 2 and port 4, and the other link formed by port 3 and port 5.
[0020] In actual use, only one of the two links is active, assuming that the link formed by port 2 and port 4 is active, and the link formed by port 3 and port 5 is used as a backup lin...
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The invention provides a transmission link switching method and device and network equipment. The transmission link switching method comprises the following steps of: when detecting a fault of a first link, changing an output port in a three-layer forwarding entry corresponding to the first link from a first port to a second port which is positioned in the same network segment with the first port, setting the attribute of the second port as a reflecting port and canceling a second-layer forwarding entry; when receiving a first message sent to second equipment by first equipment, sending the first message to the second port according to the three-layer forwarding entry and receiving the first message, and then sending the first message to other all ports, except the second port, which are positioned in the same network section together with the second port; and when receiving a second message of the first equipment, sent by the second equipment, changing the output port in the three-layer forwarding entry from the second port to a third port according to the third port of the second message, and switching a transmission link from the first link to a second link where the third port is located. According to the technical scheme, the link switching speed is increased.
Description
technical field [0001] The present invention relates to communication technology, in particular to a transmission link switching method, device and network equipment. Background technique [0002] When a device accesses another device through a layer-3 forwarding device, since multiple ports on the layer-3 forwarding device may share the same Internet Protocol (IP) address, the connection between the device and another device There may be two or more links between them. Among the two or more links, only one link is an active link, and the data flow is forwarded during the three-layer forwarding process, and the other links are used as backup links. When the active link fails, One of the other links will change from the standby state to the active state so that the data flow can continue to be forwarded at Layer 3. [0003] During the above three-layer forwarding process, when the three-layer forwarding device detects that the main link is broken, it will actively broadcast...
Claims
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IPC IPC(8): H04L12/24H04L12/703H04L45/28
Inventor 冷钦街
Owner RUIJIE NETWORKS CO LTD