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Apparatus and method of real-time recovering service

A service and router technology, applied in the field of network communication, can solve problems such as inability to guarantee VRRP convergence, waste of system resources, failure to meet real-time communication, etc., and achieve the effect of overcoming long convergence time

Active Publication Date: 2009-07-08
北京知方知识产权管理有限公司
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AI Technical Summary

Problems solved by technology

Since the minimum time granularity of the HELLO message is usually 1 second, it takes at least 3 seconds for the standby router to perceive the link failure status. This convergence time is too long for real-time services that need to quickly detect the link failure status. The transmission is processed in the control plane, so simply adopting the method of reducing the time interval for sending VRRP packets will waste a lot of system resources on the one hand, and on the other hand, it cannot guarantee that VRRP will converge within 50ms in a distributed system. Meet the requirements of real-time communication

Method used

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Embodiment Construction

[0029] BFD (Bidirectional Forwarding Detection) is a router fault detection protocol gradually developed from the basic transmission technology. It can detect faults at all layers of the network, and can be used to detect Ethernet, Multi-Protocol Label Switching (MPLS) paths, Generic routing encapsulation and multiple types of transport correctness including IPSec (IP Internet Security Protocol) tunneling.

[0030] In essence, BFD is a high-speed independent HELLO protocol that can establish a peer-to-peer relationship with adjacent systems. Then, each system monitors the BFD rate from other systems at a negotiated rate, and the monitoring rate can be incremented in milliseconds. set up. When a peer system does not receive a preset number of packets, it infers that the software or hardware infrastructure protected by BFD has failed, whether the infrastructure is a label-switched path, another type of tunnel, or an Ethernet network.

[0031] BFD works like figure 2 As shown,...

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Abstract

The invention relates to a device and method for real-time business restoration in the technical field of network communication. Based on BFD (Bidirectional Forwarding Detection) technology, the present invention provides a method for fast convergence of VRPP (Virtual Routing Redundancy Protocol). BFD detects the fault of the master router, constructs a VRRP message and transmits it to the VRRP module, and realizes the master Quick switchover of backup routers. The present invention realizes the combination of BFD and VRRP, detects faults through BFD, can realize fast standby router becoming master, and overcomes the defect of long convergence time of current VRRP.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a device and method for real-time service recovery. Background technique [0002] In the existing network system, when the main router fails, in order to restore the service as soon as possible and ensure the continuity and reliability of the communication, the VRRP (Virtual Routing Redundancy Protocol) protocol is often used to realize the switching operation between the main and standby routers. . This protocol ensures that when the next-hop router of the host fails, it can be replaced by another router in the backup state in time, so that when the device fails, the service can be automatically restored as soon as possible. [0003] The working principle of the VRRP protocol is as follows: a group of VRRP routers work together to form a virtual router. The virtual router appears externally as a logical router with a unique fixed IP address and MAC address. Rout...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L12/24
Inventor 杨建军
Owner 北京知方知识产权管理有限公司
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