Method, device and communication system to recover boundary gateway protocol connection
A border gateway protocol and transmission control protocol technology, which is applied in the field of restoring the border gateway protocol connection, can solve the problems that the system cannot self-heal, and achieve the effect of improving adaptability and avoiding system abnormalities
Inactive Publication Date: 2008-02-06
ZTE CORP
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Problems solved by technology
[0011] In order to solve the above-mentioned problems, the object of the present invention is to provide a method, device and communication system for restoring the border gateway protocol connection, so as to solve the problem that the system cannot self-heal when the system is abnormal when the configuration of the TCP layer and the BGP layer is not reasonable. question
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[0036] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0037] As shown in Fig. 1, the present invention provides a device 100 for recovering a BGP connection when a network failure occurs, the device is arranged in a router 10 of an autonomous system, and routers of different autonomous systems are connected by a TCP protocol of the BGP protocol, the device 100 includes: an active link building module 110 and a passive link building module 120, wherein the active link building module 110 is used to send a link building link to the end router 10 when the link of the other end router 10 connected to it is found to be disconnected. Request, after receiving the inquiry message that this end router sends, return TCP reset message, make described this end router 10 reset TCP connection; After the link establishment request is initiated, if the link between the local end and the end router 10 still exists, the link establishmen...
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The present invention provides a method, device and communications system used for resuming the connection of the border gateway protocol, wherein, the communications system comprises a plurality of routers of different autonomous systems, a plurality of routers are connected with one another by the TCP of the BGP. The present invention is characterized in that the router further comprises a driving chain built module used for sending the chain built request to the router in the end when the link of the router arranged at the other end and connected with the driving chain built module is switched off, and returns to the TCP replacement message when receiving the query message from the router in the end, making the router in the end resets TCP connection; and a driven chain built module used for refusing the chain built request after receiving the query message from the router in the other end which is connected with the driven chain built module and when the link of the routers between the two ends still exists, and sending a query message to the router in the end, affirming that whether the link between the customers of the two ends is normal or not, after receiving the TCP reset message returned form the router in the end, replacing the TCP connection of the router in the end.
Description
technical field [0001] The invention relates to the field of BGP (Border Gateway Protocol) in the dynamic routing protocol, in particular to a method, device and communication system for restoring the BGP connection. Background technique [0002] The BGP protocol is an exterior gateway protocol for communication between routers in different autonomous systems. BGP uses TCP as its transport layer protocol. A TCP connection is established between two systems running BGP, and the entire BGP routing table is exchanged. Afterwards, when the routing table changes, an update signal is sent. [0003] At present, when the user is at the two ends of BGP and is communicating, if any of the two ends sets the keep-alive time to 0, it will cause the BGP keep-alive to be closed. The result is that no matter the link in the middle Whether it is normal or not, users at both ends will think that their respective links are normal. When the network fails and the users at both ends cannot com...
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IPC IPC(8): H04L12/66H04L29/06H04L12/56H04L45/28
Inventor 王涛蔡勇王岱薛晓磊
Owner ZTE CORP