From: Songbin Wei (sbwei_2000@yahoo.com)
Date: Tue May 27 2003 - 17:11:38 GMT-3
IOS measures load using the following formula:
load = (average rate in one load-interval)/bandwidth
where load-interval and bandwidth are configurable.
For BRI interface, the default bandwidth is 64kbps.
If the requirement is 'bring up the 2nd channel when
the first channel's load reaches 50%', that means when
load reahes 32kbps, with the default bandwidth config
(64kbps), we have
load = 32/64 = 0.5
so the load threshold is 128.
If somehow the bandwidth was changed to 128kbps, then
load = 32/128 = 0.25
and the load-threshold should be 64. But this
situation is not common.
It's always good to verify the bandwidth by typing
'show int bri' in the lab.
--- Jonathan V Hays <jhays@jtan.com> wrote:
> You are right that it does not specify 64Kbps. But
> common sense tells us
> that if the second channel is not yet connected, IOS
> must be monitoring
> the load only on the first channel. I would say that
> the answer is that
> "dialer load-threshold" load on a B channel is
> always based on 64 Kbps.
>
> HTH
>
>
> > -----Original Message-----
> > From: nobody@groupstudy.com
> [mailto:nobody@groupstudy.com] On
> > Behalf Of Danny.Andaluz@triaton-na.com
> > Sent: Monday, May 26, 2003 7:16 PM
> > To: ccielab@groupstudy.com
> > Subject: Dialer load-threshold question
> >
> >
> > Hello, Group. On BRI interfaces is the dialer
> load threshold
> > based on 1 B channel at 64k or 2 at 128k?
> >
> > interface bri0
> > dialer load-threshold 128 either
> >
> > I would think with the above, if the first b
> channel reaches
> > half of the max capacity, then it should dial up
> the second
> > channel. This is the way I have always configured
> it on
> > production routers. It seems to work correctly
> when tested
> > with pings to the remote BRI.
> >
> > I looked at the ISDN sections on the doc CD on the
> website
> > and there is nothing definitive there.
> >
> > Thanks,
> > Danny
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