November 2006
Beginner
672 pages
15h 30m
English
Content preview from MPLS Fundamentals
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Unequal Cost Load Balancing
It is possible to have unequal cost load balancing in CEF. In that case, the 16 hash buckets are not evenly distributed among all possible paths. Example 6-9 shows a router running Enhanced Interior Gateway Routing Protocol (EIGRP) as the routing protocol and variance being configured for EIGRP. Variance allows EIGRP to perform unequal cost load balancing because it enables routes to be installed in the routing table that are not the best. (These routes do not have the lowest metric.) In short, the variance number allows all routes that have a metric that is smaller than that of the best route multiplied by the variance to be installed in the routing table. One additional check is needed: The reported distance (metric ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.