From: Richard Dumoulin (richard.dumoulin@vanco.es)
Date: Thu Jul 29 2004 - 20:04:15 GMT-3
There's a limit to what Cisco is going to reveal. You could ask the
programers who do the code though,
--Richard
-----Original Message-----
From: ccie2be [mailto:ccie2be@nyc.rr.com]
Sent: viernes, 30 de julio de 2004 0:45
To: Brian McGahan; Wang Dehong-DWANG1; Kenneth Wygand; Daniel Sheedy
Cc: ccielab@groupstudy.com
Subject: Re: Dialer load threshhold & load-interval interaction
So, why doesn't it take much longer, by default, for the 2nd circuit to kick
in?
If the load-threshold value is relatively small, say 10%, the second circuit
comes up in a few seconds - not anywhere near 5 minutes. And, this is just
from doing pings which stop very quickly.
Although this is probably outside the scope of the lab, it would be good to
really understand just how the router is calculating the load and know for
how long traffic has to exceed the load-threshold before the 3nd circuit
comes up.
Is there any way this can be determined?
Thanks, Tim
----- Original Message -----
From: "Brian McGahan" <bmcgahan@internetworkexpert.com>
To: "ccie2be" <ccie2be@nyc.rr.com>; "Wang Dehong-DWANG1"
<Dehong.Wang@motorola.com>; "Kenneth Wygand" <KWygand@customonline.com>;
"Daniel Sheedy" <dansheedy@gmx.net>
Cc: <ccielab@groupstudy.com>
Sent: Thursday, July 29, 2004 6:32 PM
Subject: RE: Dialer load threshhold & load-interval interaction
What it means is the load average over load-interval seconds. By default the
load of the interface is a five minute average. Setting load-interval to 60
seconds would make it a 1 minute average.
HTH,
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
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> -----Original Message-----
> From: ccie2be [mailto:ccie2be@nyc.rr.com]
> Sent: Thursday, July 29, 2004 5:30 PM
> To: Wang Dehong-DWANG1; Kenneth Wygand; Daniel Sheedy; Brian McGahan
> Cc: ccielab@groupstudy.com
> Subject: Re: Dialer load threshhold & load-interval interaction
>
> Does anybody know if the load-interval command affects the load
> calculation used by the dialer load-threshold command?
>
> The smallest value possible with the load-interval command is 30
seconds.
> Does that mean that after dialer load-threshold has brought up the
second
> bri circuit, it will take at least 30 of the load being less than the
> threshold before load-threshold will take down the 2nd bri?
>
> Also, it seems that dialer load-threshold kick-ins very quickly after
the
> load exceeds the load threshold value. How does the router determine,
by
> default, for how long the load must exceed load-threshold before
kicking
> in?
>
> In other words, suppose the load exceeds the load threshold for only 3
> seconds, will the 2nd circuit be brought up?
>
> How 'bout 5 seconds? etc?
>
> Thanks in advance
>
>
> ----- Original Message -----
> From: "Wang Dehong-DWANG1" <Dehong.Wang@motorola.com>
> To: "'ccie2be'" <ccie2be@nyc.rr.com>; "Kenneth Wygand"
> <KWygand@customonline.com>; "Daniel Sheedy" <dansheedy@gmx.net>; "Wang
> Dehong-DWANG1" <Dehong.Wang@motorola.com>; "Brian McGahan"
> <bmcgahan@internetworkexpert.com>
> Cc: <ccielab@groupstudy.com>
> Sent: Thursday, July 29, 2004 5:59 PM
> Subject: RE: Dialer load threshhold vs. ppp multilink
>
>
> >
> > I felt the same way after I looked at doc CD..
> >
> > Usage Guidelines
> > When the cumulative load of all UP links (a number n) exceeds the
load
> threshold the dialer adds an extra link and when the cumulative load
of
> all
> UP links minus one (n - 1) is at or below load threshold then the
dialer
> can
> bring down that one link. The dialer will make additional calls or
drop
> links as necessary but will never interrupt an existing call to
another
> destination
> >
> >
>
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/
fd
> ial_r/drfd.htm#wp1123269
> >
> > -----Original Message-----
> > From: ccie2be [mailto:ccie2be@nyc.rr.com]
> > Sent: Thursday, July 29, 2004 4:49 PM
> > To: Kenneth Wygand; Daniel Sheedy; Wang Dehong-DWANG1; Brian McGahan
> > Cc: ccielab@groupstudy.com
> > Subject: Re: Dialer load threshhold vs. ppp multilink
> >
> >
> > Dan,
> >
> > I believe you're mistaken. Dialer load-threshold will also drop a
> channel
> > if the load remains below the load-threshold long enough. Remember,
the
> > period during which the load is evaluated is determined by the
dialer
> > interval-period which, by default, uses 300 seconds (5 minutes).
> >
> > Does anybody disagree?
> >
> > But, on the other hand, it doesn't take 5 minutes for utilization to
> exceed
> > the load-threshold for the 2nd channel to be added. Go figure.
> >
> >
> >
> > ----- Original Message -----
> > From: "Daniel Sheedy" <dansheedy@gmx.net>
> > To: "Wang Dehong-DWANG1" <Dehong.Wang@motorola.com>
> > Cc: <ccielab@groupstudy.com>
> > Sent: Thursday, July 29, 2004 4:08 PM
> > Subject: Re: Dialer load threshhold vs. ppp multilink
> >
> >
> > > Hi Dehong,
> > >
> > > I was looking through the commands and found this one about number
3.
> > >
> > > Use the ppp multilink load-threshold command for dynamic bandwidth
> > > (dial-on-demand) systems in which MLP will need to dial additional
> links
> > as
> > > needed to increase the bandwidth of a connection. When the load on
the
> > > bundle interface exceeds the set value, links are added. When the
load
> on
> > > the bundle interface drops below the set value, links are dropped.
> > >
> > >
> >
>
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/
di
> al_r/dia_n1g.htm#wp1135540
> > >
> > > So, if the questions asks that the link should add the link at a
> certain
> > > load, and then remove it when it drops down below this level, then
the
> > > multilink load-threshold is the way to go. Whereas the dialer
load
> will
> > > just add it, and then timeout when it is bored (has nothing
> interesting).
> > >
> > > Dan Sheedy
> > >
> > >
> > > _______________________
> > > Subject: RE: Dialer load threshhold vs. ppp multilink
> > >
> > >
> > > > good to know the more details. I thought that load threshold and
> > multilink
> > > are bond together too :) Now my question is what should be used if
you
> are
> > > just asked to bring the second link up if the traffic on first
channel
> > > exceed some point, say 70%.
> > > >
> > > > 1. load threshold only
> > > > 2. load threshold with ppp multilink
> > > > 3. ppp multlink load threshold
> > > >
> > > > thanks.
> > > >
> > > > - Dehong
> > >
> > >
>
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