Method and device for preventing traffic from interrupting

Abstract

The invention provides a method and a device for preventing traffic from interrupting. According to the method and the device, a timer T1 and a function of keeping neighbor connection continuous are configured on routing equipment, when the configuration of an intermediate system to intermediate system routing protocol (IS-IS) of the routing equipment is changed, the connection between the routing equipment and current neighbors can be continuously maintained in a T1 time, and the update of link-state packets (LSPs) of the routing equipment and the current neighbors can also be ensured in the T1 time, and the traffic is continually to be forwarded for preventing the traffic from interrupting by utilizing the routing equipment and routers of the current neighbors.

Description

technical field [0001] The invention relates to network communication technology, in particular to a method and device for preventing flow interruption. Background technique [0002] IS-IS: Intermediate System-to-Intermediate System intra-domain routing information exchange protocol (intra-domain routing information exchange protocol) was originally developed by the International Organization for Standardization (ISO: International Organization for Standardization) as a connectionless network A dynamic routing protocol designed by the CLNP: ConnectionLess Network Protocol. In order to provide routing support for IP, the Internet Engineering Task Force (IETF: Internet Engineering Task Force) has expanded and modified IS-IS in RFC 1195, so that it can be applied in both TCP / IP and OSI environments. Integrated IS-IS (Integrated IS-IS or Dual IS-IS). [0003] IS-IS belongs to Interior Gateway Protocol (IGP: Interior Gateway Protocol) and is used inside an autonomous system. It...

AI Technical Summary

Problems solved by technology

[0006] There are other situations such as figure 2 As shown, Router A and Router B are IS-IS neighbors, and the interface configuration is a broadcast network. At this time, for some reason, the IS-IS neighbors of Router A and Router B need to be changed to PTP. The network type of the interface connected to Router B is configured as PTP. In this way, because the interface configurations of Router A and Router B are different, the IS-IS neighbor between Router A and Router B will be disconnected, and Router A will recalculate the SPF. The routes to Router B will be lost, and the traffic on these routes will also be cut off. After Router B is successfully configured with a network type of PTP, and the IS-IS neighbor relationship between Router A and Router B is established, the route will converge at the same time. After the completion, the interrupted traffic will return to normal

[0007] In this way, when there are many network nodes in the same IS-IS network and the configuration needs to be modified, it will take a long time for the network topology in the network to stabilize, and the traffic will not be guaranteed for a long period of time.

Images