I'm not sure increased bandwidth would affect routing
policy. That's an interesting question though.
As far as the granularity of the delay formula, they
will probably do the same as they did with calculating
Spanning-Tree path costs. With the old calculations
(1000MB/Bandwidth), Fastethernet would be 10
(1000/100) and anything a Gig or higher would be 1 or
fractional. So they instituted non-linear numbers such
as a cost of 19 for a 100MB link and 4 for a 1 GB link
and 2 for a 10 GB link.
I would like to hear discussions about the first part
of the question though.
Michael
--- Santosh Koshy <[EMAIL PROTECTED]> wrote:
> With new & emerging technologies like (Gig Eth, 10
> Gig Eth, e.t.c), I am
> beggining to wonder how scalable or well suited
> today's routing protocols
> (OSPF, IGRP, EIGRP, e.tc. ) are to manage them
> effectively.
>
> I stubled across something while reading about delay
> calculations on a IGRP
> / EIGRP network... maybe you guys can help..
>
> The bandwith component of a metric is calculated by
> dividing 10,000,000 by
> bandwith in Kbps.
> Eth = 10,000,000 / 10,000 = 1000
> Fast Eth = 10,000,000 / 100,000 = 100
> Gig Eth = 10,000,000 / 1,000,000 = 10
> 10 Gig Eth = 10,000,000 / 10,000,000 = 1
> New Fangled Eth (not yet invented) = 10,000,000 /
> 100,000,000 = 0.1
>
> As you can see delay will be calculated in thousands
> of microseconds and we
> end up getting fractional numbers...... I highly
> doubt IOS can use
> fractional numbers to calulate delay...... Are
> todays's routers capable of
> making such calculations with an easy IOS
> upgrade....
>
> Thanks,
> Santosh Koshy
>
>
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