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

It will install all possible routes to the destination into the ip routing table but use only the min cost path (the idea is it decreases convergence or dual times)

If you have two min cost paths then load balancing will occur across both interfaces using cef's 16 bit hash bucket (per destination load balancing by default)

--
BR
Tony
Sent from my iPhone on 3
On 21 Sep 2012, at 07:36, 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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