From: Olivier Martin (omartin@xxxxxxxx)
Date: Mon Sep 17 2001 - 15:22:51 GMT-3
As you know, the route placed in the routing table is the one with the least
cost (all other things being equal, that is the routing protocol!). If the
usage of the serial link increases, it will increase the eigrp metric. Up
to a point where it will pass over the one of the ISDN circuit. Then, the
BRI interface will be in the routing table as the best route. The packets
will then flow through this interface.
But after this, I don't know what happens.. The routes through the serial
interface dissapear to be replaced by the other, so the traffic rate gets
lower so the serial interface takes the load.. Does it make sense ?
-----Message d'origine-----
De : Jason Gardiner [mailto:gardiner@sprint.net]
Envoyi : 17 septembre, 2001 14:26
@ : Olivier Martin
Objet : Re: Frame-Relay Threshold
I'm afraid that you've lost me. Could you rephrase your last argument?
Olivier Martin wrote:
>
> But not using the variance.. If you tweak the numbers so that the metric
of
> the frame relay becomes higher than the one of the BRI link, it is going
to
> work. Because the BRI is the only one which will be in the routing table
> after it has reached 50% usage..
>
> -----Message d'origine-----
> De : Jason Gardiner [mailto:gardiner@sprint.net]
> Envoyi : 17 septembre, 2001 14:07
> @ : Church, Chuck
> Cc : 'Olivier Martin'; 'Philippon'; 'ccielab@groupstudy.com'
> Objet : Re: Frame-Relay Threshold
>
> Couple of flaws in this:
>
> http://www.cisco.com/warp/public/103/19.html
>
> Variance would cause 2 packets to go through the serial and then one
> through the BRI all the time.
>
> This would also mean that the BRI would have to be active all of the
> time.
>
> "Church, Chuck" wrote:
> >
> > What I was thinking of doing was assigning the 5 variables so that the
> frame
> > relay metric would equal x when load hits 128. Configure the variables
> for
> > the dial backup so that the metric equals 2x. Leave the bandwidth
> parameter
> > artifically high on the dialup do that the dialup metric doesn't change
> much
> > with increased load. With a variance of 2, the dialup will become a
> viable
> > route once the frame hits 50%. I've never actually tried this, but
that's
> > my understanding of EIGRP.
> >
> > Chuck
> >
> > -----Original Message-----
> > From: Olivier Martin [mailto:omartin@genia.ca]
> > Sent: Monday, September 17, 2001 1:06 PM
> > To: 'Church, Chuck'; 'Philippon'; 'ccielab@groupstudy.com'
> > Subject: RE: Frame-Relay Threshold
> >
> > How could you use this to trigger a link after 50% usage ? The variance
> is
> > meant to provide unequal load balancing as the routes are usually only
> > installed in the routing table if they have equal metrics.. May be I'm
> > missing something important..
> >
> > Thanx
> >
> > Olivier
> >
> > -----Message d'origine-----
> > De : Church, Chuck [mailto:cchurch@USTA.com]
> > Envoyi : 17 septembre, 2001 12:56
> > @ : 'Philippon'; 'ccielab@groupstudy.com'
> > Objet : RE: Frame-Relay Threshold
> >
> > Both IGRP and EIGRP can base a metric on load. Combining that with a
> > variance command might work.
> >
> > Chuck
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> > Philippon
> > Sent: Monday, September 17, 2001 12:24 PM
> > To: ccielab@groupstudy.com
> > Subject: Frame-Relay Threshold
> >
> > I am trying to activate an ISDN BRI line when my
> > Frame-Relay Line reaches a 50% threshold. Here is the
> > catch. I DO NOT want to use the "backup interface"
> > and "backup load" command. Any ideas? Thanks.
> >
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 10:32:19 GMT-3