From: Daniel Cisco Group Study (danielcgs@imc.net.au)
Date: Sun Jun 08 2003 - 20:11:12 GMT-3
I don't think so. In ppp multilink environment, packets are fragmented across multiple B channels. It would be highly unlikely that any B channels would be quite, while others are busy.
Daniel
-----Original Message-----
From: John Underhill [mailto:stepnwlf@magma.ca]
Sent: Monday, 9 June 2003 01:56
To: Daniel Cisco Group Study; ccielab@groupstudy.com
Subject: Re: Dialer Load Threshold - When does it come back down???
Doesn't this depend on the dialer idle-timeout setting? If any one of the
cumulative links is idle beyond the defined time it will drop, and redial if
the load threshold is reached again..
----- Original Message -----
From: "Daniel Cisco Group Study" <danielcgs@imc.net.au>
To: <ccielab@groupstudy.com>
Sent: Sunday, June 08, 2003 2:36 AM
Subject: Dialer Load Threshold - When does it come back down???
> This whole issue is very unclear in my mind. The docos say the following:
>
> "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"
>
> I would like to work on a couple of examples with those who are
interested.
>
> (1) Say I use the following:
>
> int bri 0
> ppp multilink
> dialer load-threshold 64 either
>
> I think that we would all agree that the 2nd B channel comes up when the
load in either direction on the active (1st) B channel reaches 16kbps. (64k
x [64/255]).
>
> Now, when does it come back down ???? The doco tries to explain it, but
its all very muddy in my mind.... I don't know what its trying to say.
>
>
> (2) Let's take this one step further.
> We have an E1 PRI service (30 channels + 1D) - placing calls to the same
destination:
>
> int s0/0:15
> ppp multilink
> dialer load-threshold 64 either
>
> We would agree that if we already have 5 B channels up, the 6th one comes
up when the combined bandwidth of all 5 B channels is 80k (5 x 64 x
[64/255]). Correct ?????
>
> Now we have 6 B channels for a combined total available bandwidth of 384k.
When does one of the B channels drop?
>
> Daniel
>
>
>
>
>
>
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