Yes you are correct about the bandwidth and there is another important
feature in EIGRP, EIGRP will only use 50% of the available bandwith so
if you misconfigure bandwidth especially on slow links the results can
be noticeable.
Dave
Priscilla Oppenheimer wrote:
>
> At 09:52 AM 9/19/01, Ole Drews Jensen wrote:
> >Until now, my understanding of the bandwidth command on an interface was
> >that it was only used by some of the dynamic routing protocols, but last
> >night I read in my CIT book that you normally set the bandwidth to the CIR
> >when you use Frame Relay.
> >
> >Does that mean that the router actually looks at the bandwidth specified
by
> >you when deciding when to set the DE bit to 0 or 1?
>
> I think the reason to set the bandwidth to the CIR is so that the composite
> metric used by IGRP and EIGRP and the bandwidth-based metric used by OSPF
> are based on reality about capacity on the link rather than a default
> setting.
>
> It has to do with routing protocols and deciding which path to insert into
> the routing table. It doesn't have to do with the router's other main job
> of forwarding packets.
>
> We have had many discussions about when the DE bit gets set and I must
> admit I haven't followed them. But I think the gist of them was that it's
> set by the provider if you go over the DE. The router doesn't normally set
> it. Probably all those bizarre queuing algorithms affect this though. (I
> know there are some cases where the router sets it...) John N. knows all
> about Fido Fido queuing, etc. Plus you can find a lot in the archives.
>
> Priscilla
>
> >Thanks,
> >
> >Ole
> >
> >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > Ole Drews Jensen
> > Systems Network Manager
> > CCNA, MCSE, MCP+I
> > RWR Enterprises, Inc.
> > [EMAIL PROTECTED]
> >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > http://www.RouterChief.com
> >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > NEED A JOB ???
> > http://www.oledrews.com/job
> >~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> ________________________
>
> Priscilla Oppenheimer
> http://www.priscilla.com
--
David Madland
Sr. Network Engineer
CCIE# 2016
Qwest Communications Int. Inc.
[EMAIL PROTECTED]
612-664-3367
"Emotion should reflect reason not guide it"
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