Resource reservation protocol node and its interaction method

Abstract

The invention relates to communication field, discloses a RSVP node and interactive method, and the RSVP HELLO of RSVP node can keep LSP work normally. In the invention, the RSVP HELLO of first node based on RSVP sends first message to inform the adjacent nodes of first node, when adjacent nodes receives the message, sets the sign of RSVP HELLO which represent the first node, and keep the LSP passing the first node according to state of RSVP HELLO of first node. The fist node detects adjacent nodes use the RSVP HELLO function or not before sending first message, and sends to the adjacent nodes which has RSVP HELLO, and reduce the sending time of first message to save the system source.

Description

technical field [0001] The invention relates to the communication field, in particular to a communication system based on a resource reservation protocol. Background technique [0002] After more than 30 years of development, Ethernet technology based on Transmission Control Protocol / Internet Protocol (Transmission Control Protocol / Internet Protocol 1, referred to as "TCP / IP") has become an absolutely dominant LAN technology and has successfully entered the public network. The core network is rooted in the metropolitan area network and gradually penetrates into the public access network. For almost every application, Ethernet technology has become the de facto transmission protocol standard. Due to its simplicity, flexibility and low cost, its advantages have far exceeded some traditional technologies, such as Token Ring (Token Ring) ), fiber distributed data interface (Fiber Distributed Data Interface, referred to as "FDDI") and asynchronous transfer mode (Asynchronous Tra...

AI Technical Summary

Problems solved by technology

[0015]In practical application, the above scheme has the following problems: when RSVP node disables RSVPHELLO, its neighbor nodes cannot correctly judge whether the RSVP node is lost

[0016]The main reason for this situation is that in the prior art, the adjacent RSVP nodes use the RSVP HELLO mechanism to detect the existence of each other, by sending After the "HELLO REQUEST" message, receive the feedback "HELLO ACK" message from the neighbor node to judge whether the neighbor node is lost. However, this method of judgment can only be correct when the RSVP HELLO mechanism is enabled on all RSVP nodes. As a result of the judgment, once one of the nodes disables the RSVP HELLO mechanism, the node will not return the "HELLO ACK" message after receiving the "HELLOREQUEST" message from its neighbor node, but the node is not lost. In this situation, its neighbor nodes cannot judge whether the RSVP node is lost because they cannot receive the "HELLO ACK" message, or produce a wrong judgment result

For example, the RSVP node may not receive the "HELLO ACK" message from a neighbor node within several cycles, and then judges that the neighbor node has been lost, and the network side handles it according to the link layer communication failure, and mistakenly Remove the LSP passing through the neighbor node, which will cause the interruption of the LSP

Images