Data transmission method and network system

Abstract

The embodiment of the invention provides a data transmission method and a network system. The data transmission method comprises the steps that first access network equipment detects and knows that a first link between the first access network equipment and a first router, or the first router goes wrong, a working link for transmitting data is switched from the first link to a second link serving as a protective link currently, and the second link is between second access network equipment and a second router; the first access network equipment transmits the data to the second access network equipment, and transmits the data to a network side through the second link serving as the protective link currently; and the same VRID (virtual router identification) and virtual router redundancy protocols with the same virtual IP (Internet protocol) are configured on the first router and the second router, the virtual router redundancy protocols do not conduct master and slave selection, and the second router has a data forwarding function initially. The data transmission method and the network system can shorten interrupting time of a flow.

Description

technical field [0001] Embodiments of the present invention relate to communication technologies, and in particular to a data sending method and a network system. Background technique [0002] Dual-homing networking is one of the commonly used networking technologies at present. This networking technology can improve network reliability by switching between active and standby links when a link fails. Under normal circumstances, the traffic passes through the active link composed of the packet transport network and the user edge device. When the active link fails, the traffic protection is switched to the backup link composed of the packet transport network and the user edge device, so as to improve performance To improve the reliability of network transmission. [0003] figure 1 It is a schematic diagram of a three-point bridge scenario in the dual-homing networking technology. Such as figure 1 As shown, the scenario may include: a packet transport network (Packet Transp...

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Problems solved by technology

[0004] However, in the actual implementation process, only when the standby router switches to the active router, the standby router has the traffic forwarding capability, and the existing technology cannot guarantee that the switching of the working link and the switching of the active and standby routers are synchronized. Switchover often has a certain delay, and the switchover time of the active and standby routers is longer than that of the link, resulting in a longer traffic interruption time

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