If a route does not carry MED, BGP considers its MED as the default value (0) during route selection. If the bestroute med-none-as-maximum command is run, BGP considers its MED as the largest MED value (4294967295) in this case. If the compare-different-as-med command is run, BGP ...
This route is called a RemoteCross route. Prefers EBGP routes to IBGP routes. Prefers the route with the lowest IGP metric to the BGP next hop. If there are multiple routes to the same destination, an IGP calculates the route metric using its routing algorithm. Prefers the route with the ...
The AS2 route requires fewer hops than the AS6 route, and therefore it is the quickest, most efficient route. Now imagine that there are hundreds of thousands of ASes and that hop count is only one part of a complex route selection algorithm. That is the reality of BGP routing on the ...
Best Path Selection是一个根据Path Attribute运算,从指向同一个目的IP prefix的,多条BGP Message中选出一条最优的过程。这个过程不复杂,但是比较繁琐,相应的介绍也很多了,限于篇幅我就不展开了,感兴趣可以看看思科的文档BGP Best Path Selection Algorithm。 4. BGP Local RIB Best Path Selection能确保指向同一...
Best Path Selection是一个根据Path Attribute运算,从指向同一个目的IP prefix的,多条BGP Message中选出一条最优的过程。这个过程不复杂,但是比较繁琐,相应的介绍也很多了,限于篇幅我就不展开了,感兴趣可以看看思科的文档BGP Best Path Selection Algorithm。 4. BGP Local RIB Best Path Selection能确保指向同一...
Introduction This document outlines the BGP best path selection algorithm, and covers specific configuration examples on how to manipulate BGP’s best path decision based on different attributes. Initial Topology The following topology will be
How the Best Path Algorithm Works Customize the Path Selection Process BGP Multipath NetPro Discussion Forums ? Featured Conversations Related Information Introduction Border Gateway Protocol (BGP) routers typically receive multiple paths to the same destination. The BGP best path algorithm decides which ...
same destination. These paths are installed in the table together with the best path for load sharing. BGP Multipath does not affect bestpath selection. For example, a router still designates one of the paths as the best path, per the algorithm, and advertises this best path to its ...
path selection criteria, the path with a local preference of 130 (130 is greater than 125) is selected as the best path within AS 100, and is installed in the IP routing table of R1 and R2. For more information on BGP path selection criteria, refer toBGP Best Path Selection Algorithm....
The BGP best path selection algorithm and the multipath computation algorithm that determines which paths you can use for load balancing does not change. Underlay Routing with W-ECMP W-ECMP load balances underlay traffic to spine switches as traffic is sent to remote VTEPs. Spines advertise...