A method and device for updating outbound interface of equal-cost multipath
A technology of equal-cost multi-path and update method, which is applied in the direction of digital transmission system, data exchange network, electrical components, etc., and can solve the problems of unable to meet the high reliability requirements of the network, unable to achieve traffic load balancing, and unable to update the outgoing interface, etc. To achieve the effect of ensuring fast convergence, meeting reliability requirements, and facilitating discovery
Active Publication Date: 2019-09-06
NANJING ZHONGXING XIN SOFTWARE CO LTD
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However, the inventor found that in practical applications, after obtaining the ECMP routing table entry, the device may not have locally generated Layer 2 forwarding information of a certain outgoing interface, which leads to the fact that the Forward Information Base (FIB) cannot be updated all the time. This outbound interface makes it impossible to achieve load balancing of traffic, and may cause interruption of business traffic under certain circumstances, which cannot meet the high reliability requirements of the network.
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[0048] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.
[0049] In the intermediate system to intermediate system (IS-IS) routing protocol, a switch is an intermediate system, and the protocol used by the switches to announce each other is called the IS-IS protocol. The IS-IS routing protocol discovers neighbors and forms an adjacency relationship by exchanging Hello PDU messages, and uses Link State PDU messages to advertise routes. The exchange of routing protocol packets will not trigger the learning of the address resolution protocol (ARP) of neighbor devices, so the next-hop address of the route processed through routing topology calculation may not exist in the ARP entry, and the FIB entry generated by the route on the forwarding plane There may be no actual outgoing interface. In this way, only when th...
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The invention provides a method and device for updating an outbound interface of an equal-cost multipath. The present invention periodically updates the next-hop address of the invalid ECMP link, triggers the ARP learning process, and obtains the outbound interface of the link, thereby quickly updating the FIB entry of the ECMP. The invention has high flexibility, is convenient for network discovery, operation and maintenance and management, ensures the effectiveness of routing FIB table, effectively utilizes the bandwidth of ECMP multipath, and provides guarantee for the realization of load balancing and bandwidth control.
Description
technical field [0001] The present invention relates to the technical field of data communication, in particular to an Equal-Cost Multi-Path (ECMP, Equal-CostMulti-Path) outbound interface updating method and device. Background technique [0002] With the rapid development of Internet Protocol (IP, Internet Protocol) services and the widespread application of Ethernet in metropolitan area networks, the scale of the three-tier network is getting larger and larger, making the bandwidth and reliability of the network an important task for telecom operators. The focus of businessmen's increasing attention. In a traditional hierarchical network, when the aggregation layer network is connected to the core network, a large number of routing entries are learned, and the upstream traffic is large. In order to ensure the load balancing and protection of traffic, ECMP routes are often established as the access link routing. [0003] In the traditional routing technology, data packets...
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IPC IPC(8): H04L12/757
Inventor 杜旭
Owner NANJING ZHONGXING XIN SOFTWARE CO LTD