Switching method for recursive routing, router, switch and electronic device

Abstract

Embodiments of the present invention provide a switching method for recursive routing, a router, a switch, and an electronic device. The method comprises the following steps of: determining a virtualhost route of the recursive route according to a non-directly connected next hop IP address of each recursive route in a routing table; calculating a directly connected next hop IP address of the virtual host routing according to the routing table; Associating the recursive route in a forwarding table, the virtual host route and the directly connected next hop IP address; if it is detected that the direct next hop IP address of the virtual host route is changed, updating the direct next hop IP address of the virtual host route in the forwarding table. As the recursive route switch time of theembodiment of the invention is independent of the number of recursive route, the network interruption time is reduced, and the switching granularity is not required to be at a single route level according to the actual scene configuration, which does not cause other routes to be miscut, avoids unnecessary interruption and improves the network availability.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of communications, and in particular to a method for switching recursive routing, a router, a switch, and electronic equipment. Background technique [0002] When the routing device forwards the message, it needs to rely on the routing information in the routing table (Routing Information Base, RIB). The routing information includes: prefix ( / mask length), next hop address (exit) and routing behavior, for example: 2.0. 0.0 / 24 next hop IP 3.0.0.1GigabitEthernet 0 / 1forward, where 2.0.0.0 / 24 is the prefix and mask length, 3.0.0.1 is the next hop IP, GigabitEthernet 0 / 1 is the next hop egress, and forward is the route the behavior of. When the routing device receives an IP packet with a destination address of 2.0.0.0~2.0.0.255, it searches the routing table for a route matching 2.0.0.0 / 24 through the Longest Prefix Match principle (LPM) and forwards it to the next IP packet. Jump to 3...

AI Technical Summary

Problems solved by technology

[0036] However, for the first routing switching method, there may be other links on R2, and not all packets going through R2 will be routed to R4, and direct switching may easily cut off other traffic by mistake, resulting in unnecessary traffic interruption. Hop detection needs to be specially configured according to the actual scene. The switching granularity of this method is the link level, and the switching strength is relatively coarse. It is not suitable for complex scenarios and requires special configuration. It is not flexible and easy to use.

The second route switching method also requires special configuration, and there are also miscut other traffic, and if there are many other routing devices between R1 and R2, the configuration will be very complicated

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