From: Nguyen Hoang Long (ng-hlong@hn.vnn.vn)
Date: Wed May 28 2003 - 08:47:59 GMT-3
Thanks Brian,
I thought you was main contributor for IPexpert workbook. Because in that
workbook, the English wordings is similar to yours on groupstudy.
Sorry, English is not my language ;-)
Long.
----- Original Message -----
From: "Brian Dennis" <brian@labforge.com>
To: "'Nguyen Hoang Long'" <ng-hlong@hn.vnn.vn>; <ccielab@groupstudy.com>
Sent: Wednesday, May 28, 2003 2:26 PM
Subject: RE: Dialer load-threshold question
> But to answer your question the load is based off 64kbps so the
> load-threshold should be set to 128 for 32kbps (50% utilization).
>
> As a side note not all ISDN connections are 64kbps per B channel. ISDN
> can be 56kbps per B channel.
>
> Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Nguyen Hoang Long
> Sent: Tuesday, May 27, 2003 10:21 PM
> To: Songbin Wei; Jonathan V Hays; ccielab@groupstudy.com
> Cc: Danny.Andaluz@triaton-na.com; Brian Dennis
> Subject: Re: Dialer load-threshold question
>
> IPExpert uses 64, not 128.
>
> Hi Brian,
>
> can you explain a bit more
>
> Thanks
> Long
>
> ----- Original Message -----
> From: "Songbin Wei" <sbwei_2000@yahoo.com>
> To: "Jonathan V Hays" <jhays@jtan.com>; <ccielab@groupstudy.com>
> Cc: <Danny.Andaluz@triaton-na.com>
> Sent: Wednesday, May 28, 2003 3:11 AM
> Subject: RE: Dialer load-threshold question
>
>
> > 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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