Method for raising service reliability in virtual private network, system thereof and access apparatus
A virtual private network and reliability technology, applied in transmission systems, digital transmission systems, network interconnection, etc., can solve problems such as high requirements for maintenance personnel, large configuration, mismatched and missing configurations, etc., to achieve business continuity, Avoid routing vibration and improve user experience
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Embodiment 1
[0062] figure 2 It is a flowchart of a method for improving service reliability in a virtual private network according to Embodiment 1 of the present invention, such as figure 2 As shown, the link state detection between the two BNGs (active BNG and backup BNG) is performed with the Bidirectional Forwarding Detection (BFD, Bidirectional Forwarding Detection) protocol, and the Virtual Router Redundancy Protocol (VRRP, Virtual Router Redundancy Protocol) protocol is used. BNG master-standby state negotiation, user information backup is performed between the master device and the backup device, where BNG1 is the master device and BNG2 is the backup device. In this example, the standby BNG advertises routing information to the active BNG before the downlink of the active BNG fails. In this example, the method for improving service reliability in a virtual private network specifically includes the following steps:
[0063] Step 201, a TCP connection is established between BNG1 ...
Embodiment 2
[0072] image 3 It is a flowchart of a method for improving service reliability in a virtual private network according to Embodiment 2 of the present invention, such as image 3 As shown, the BNG protocol is used to detect the link state between the two BNGs, and the virtual router redundancy protocol (VRRP, Virtual Router Redundancy Protocol) protocol is used to negotiate the active and standby state of the BNG. Information backup, where BNG1 is the main device and BNG2 is the backup device. The difference between this example and the above example is that the standby BNG advertises routing information to the active BNG after the downlink of the active BNG fails. In this example, the method for improving service reliability in a virtual private network specifically includes the following steps:
[0073] Step 301, establishing a TCP connection between BNG1 and BNG2 as a message channel for backing up online user information (including VPN user information);
[0074]Step 302...
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