Re: EIGRP unequal metric LB

Hi Michael,

I am going to need more information.
First, what is the network and router from which you are attempting to
perform unequal cost load balancing.
Then, on that router, what is the output of "show ip eigrp AS topology
IP/MASK"
Is variance ruled out, if not, then I would be using the variance X
command (as long as the advertised distance of the worst route is lower
than the feasible distance).
If it isn't an even multiplier (which it is here - x 4) then you can
change the maximum paths also.

Note that if you are not allowed to use the variance command then you
can use an offset list to manipulate and add to the metric value (from
the inbound interface) - though you cant use it to subtract from the
metric value.

The last option would be to manipulate bandwidth and delay values - this
is more painful as it is slow and hard to get the right balance.

regards Andy

michael.botha_at_gm.com wrote:
> Hi,
>
> I am really battling to calculate the delay required to get unequal cost LB
> ratio's correct.
>
> I have two routes to a destination prefix.
>
> One via a frame-relay link and the other via an ethernet segment.
>
> I need to balance the traffic with a ration of 4:1.
>
> By setting the delay I manage to get a ration of 40:11 which is pretty close to
> 4:1 but not exactly. I then up the delay on one interface and turn it down on
> the other and I get a ratio of 38:10.
>
> Anyways - bottom line is. I am missing the maths here to get these ratio 100%
> spot on.
>
>
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Received on Thu Jul 30 2009 - 16:24:07 ART