Re: How Does Unequal Cost Path Load Balancing (Variance) Work

Yes. You're correct, but a route with feasible successors will already
converge extremely fast, with only a small amount of overhead. By
using traffic-share min, alternate routes(that meet the feasibility
condition/variance requirements) are stored in the FIB/CEF table, and
will help decrease some of that overhead. If instead you have multiple
*equal* cost paths, the command will have no effect.

-Yuri

On Thu, Sep 20, 2012 at 11:36 PM, Arista Wirawan <aristaw_at_gmail.com> wrote:
> *Hi CCIEers,*
>
> *router eigrp 1
> network x.x.x.x
> variance 3
> traffic-share min across-interfaces*
>
> "when you use the *traffic-share* command with the keyword *min*, the
> traffic is sent only across the minimum-cost path, even when there are
> multiple paths in the routing table.".
>
> With this command "traffic-share min across-interface" the traffic is
> send only across the minimum-cost path.
>
> What happen if we have two minimum cost path with the same metric for
> the same destination, will it choose the one or both ?
>
> Traffic-share min interface + variance will only route one minimum
> cost path but will install the feasible route in the routing table so
> it will save convergence time.
>
> Please correct me if i am wrong with the explanation "traffic-share
> min interface + variance"
> Thanks
>
>
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Received on Fri Sep 21 2012 - 00:32:11 ART