A routing reflector-based path optimization method and system

Abstract

The invention discloses a path optimization method and system based on a route reflector, and relates to the field of data communication. The method includes: the first route reflector obtains the topology information of the whole network and receives the complete BGP routing information of the whole network sent by the second route reflector; the first route reflector collects and analyzes the traffic flow data and link utilization rate of the whole network data, and formulate traffic grooming and optimization strategies; the first route reflector according to the traffic grooming and optimization strategy to the optimized Path routers reflect preferred BGP routes. It can realize multi-path load balancing of traffic, and avoid the problem of suboptimal routing caused by the lack of perspective of the whole network topology. In addition, because the first route reflector only needs to establish IBGP connections with routers involved in path optimization, this can reduce the processing load of the first route reflector.

Description

technical field [0001] The present invention relates to the field of data communication, in particular to a routing reflector-based path optimization method and system. Background technique [0002] In the prior art, when a route reflector (Route Reflector, RR) receives multiple routes of the same destination network, due to following the standard BGP route selection principle, there are the following limitations: [0003] 1. The principle of uniqueness in route selection causes RR to only reflect the only preferred route to routers in the entire network, causing some links to be congested, while other links are often empty or lightly loaded, making it impossible to achieve multi-path load balancing of traffic. [0004] 2. Since the RR selects a route with the closest IGP distance based on the IGP metric (Metric) value from itself to the advertising router (next hop), this preferred route is related to the location of the RR, and cannot represent other routers in the entire ...

AI Technical Summary

Problems solved by technology

[0003] 1. The principle of uniqueness in route selection causes RR to only reflect the only preferred route to the routers in the entire network, causing some links to be congested, while other links are often empty or lightly loaded, making it impossible to achieve multi-path load balancing of traffic

[0004] 2. Since the RR selects a route with the closest IGP distance based on the IGP metric (Metric) value from itself to the advertising router (next hop), this preferred route is related to the location of the RR, and cannot represent other routers in the entire network to this route. The selected BGP next hop is the closest, and the lack of the perspective of the entire network topology leads to the generation of suboptimal routes

[0005] 3. Without considering the resource utilization of the entire network, it is impossible to realize the traffic engineering of the entire network

[0006] 4. RR follows the standard BGP route selection principle and cannot realize the traffic distribution according to the planned path

One limitation of ordinary RR following the standard BGP route selection principle is the uniqueness of route selection, that is, when it receives multiple routes from the same destination network, it only selects the route it thinks is the best, so cross-domain multi-homing cannot be realized Network load balancing

Images