From: Deluzio, Jamey A (Jamey) (deluzio@avaya.com)
Date: Thu Jan 02 2003 - 18:55:05 GMT-3
Ok, how about a 5th opinion ;-). Just to clarify we're talking about LLQ
also known as PQ/CBWFQ. I agree with Michael's latest e-mail and with
Andy's email about the PQ being used at all times. With voice traffic
delay and jitter have to be kept to a minimum.
My question is in regards to part of Andy's email
"The difference with and without congestion is with it the priority/LLQ
queue is policed to the maximum bandwidth/percentage you configured.
Without congestion it can exceed that maximum."
Everything I've seen states that traffic exceeding the PQ bandwidth will
be dropped. I have not seen anything showing that this is dependant on
congestion. If anyone has a link or any additional information I'd
appreciate it.
Jamey
-----Original Message-----
From: Nordhoff, Michael G. (US - Hermitage)
[mailto:mnordhoff@deloitte.com]
Sent: Thursday, January 02, 2003 2:13 PM
To: 'Michael Popovich'; Diment, Andrew; Fadiltakipte;
ccielab@groupstudy.com
Subject: RE: Re: IP RTP priority and priority commands
I disagree also. It has been my experience that the Priority queue is
only
used during periods of congestion on the network. I've also referred
back
to some of my training material and it states the same.
- MN
-----Original Message-----
From: Michael Popovich [mailto:michael625@cox.net]
Sent: Thursday, January 02, 2003 2:52 PM
To: Diment, Andrew; Fadiltakipte; ccielab@groupstudy.com
Subject: RE: Re: IP RTP priority and priority commands
I disagree.
We use LLQ in our environment and unless I have congestion in the
network I
do not see packets go across the priority queue. If it was in use all of
the
time I would see packets in the debug output for the priority queue
continually go up.
Michael
>
> From: "Diment, Andrew" <adiment@qwest.com>
> Date: 2003/01/02 Thu PM 03:31:23 EST
> To: "'Michael Popovich'" <michael625@cox.net>,
> Fadiltakipte
> <fadiltakipte@hotmail.com>, ccielab@groupstudy.com
> Subject: RE: Re: IP RTP priority and priority commands
>
> The priority or LLQ queue is used all the time. Even with no
congestion
if
> a voice packet where to get behind several other packets it is going
to
add
> latency. The difference with and without congestion is with it the
> priority/LLQ queue is policed to the maximum bandwidth/percentage you
> configured. Without congestion it can exceed that maximum.
>
> Andy
>
> -----Original Message-----
> From: Michael Popovich [mailto:michael625@cox.net]
> Sent: Thursday, January 02, 2003 1:42 PM
> To: Fadiltakipte; ccielab@groupstudy.com
> Subject: Re: Re: IP RTP priority and priority commands
>
>
> I was under the impression that when you use queuing such as CBWFQ
that
you
> match traffic for the queues and they are in fact matched and placed
in
> queues but as for the priority queue, it is not used unless congestion
is
on
> the network.
>
> MP
> >
> > From: "Fadiltakipte" <fadiltakipte@hotmail.com>
> > Date: 2003/01/02 Thu PM 01:48:51 EST
> > To: <ccielab@groupstudy.com>
> > Subject: Re: IP RTP priority and priority commands
> >
> > I have a question related to this.
> > I have configured custom queuing in my lab enviorement. I turned the
> custom
> > queuing debugging on and i pinged to the other side. Although there
was
no
> > other traffic i got some debugs. I concluded that custom queueing
works
> all
> > the time (not only when there is a congestion). I know that CCO says
the
> > opposite but somebody can explain me why I am getting debugs telling
me
> that
> > custom queuing is working ?
> >
> > Thanks
> > ----- Original Message -----
> > From: <Sam.MicroGate@usa.telekom.de>
> > To: <ccielab@groupstudy.com>
> > Sent: Thursday, January 02, 2003 10:09 AM
> > Subject: IP RTP priority and priority commands
> >
> >
> > > Hello Group,
> > >
> > > I know that any queuing technique does not kick in unless there is
a
> > > congestion in the router. Is that also true for IP RTP priority
and
LLQ?
> I
> > > mean does the router send the voice packets to the priority queue
or
the
> > > configured priority class to priority queue all the time or if
there
> > > congestion only? I hope that my question is clear. Please let me
know
if
> > you
> > > need more clarification. Thanks.
> > >
> > >
> > > Sam
> > > .
> > .
> .
> .
.
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