From: Brian Hescock (bhescock@xxxxxxxxx)
Date: Fri Sep 01 2000 - 10:06:24 GMT-3
Lawrence,
Variance isn't recommended because it causes out of sequence packets.
You can end up with a lot of retransmissions, further driving up your
bandwidth utilization. Also, EIGRP does have the "load" k value for it's
metric but it really isn't used. the only time the load value is used is
when the route is first injected into the routing table. EIGRP will not
choose a new route if the load goes higher.
Brian
Lawrence Dwyer wrote:
> Hello,
> I am curious, if you have 2 unequal cost paths to a destination, can
> you use route-map or policy routing to switch from the lowest cost to
> the higher cost path when the lower reaches xxx load threshold?
> Similar to bringing up a second line on a BRI with threshold. I figure
> for those routing protocols that have Load in their metrics, it would do
> it once the Load reached a cost where the metric for the 2nd path was
> actually lower. And there is the variance command for load balancing in
> EIGRP. Or would you have to figure it out by metrics only (say in OSPF)
> and lower the bandwidth satement on your primary so that at that
> particular xxx load, the cost would be lower on the secondary?
> In response to a Howard like question, there is no problem I am trying
> to solve. I was thinking about different ways to get packets down
> different paths.
> Larry
>
> --
> Lawrence Dwyer, MCSE CCNA
> Project Officer
> Telemedicine Advanced
> Technology Research Center
>
> (301) 619-7946
>
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