From: Jason Gardiner (gardiner@xxxxxxxxxx)
Date: Mon Sep 17 2001 - 15:32:09 GMT-3
I believe that in the case of Variance, both routes would be in the
table.
Olivier Martin wrote:
>
> 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.
> > >
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