From: Joe Chang (changjoe@earthlink.net)
Date: Fri Jun 11 2004 - 18:20:28 GMT-3
Is it the priority queue in LLQ serviced ahead of all other queues until it
is empty? Or is it just a queue that is weighted the most favorably ?
----- Original Message -----
From: "Brian McGahan" <bmcgahan@internetworkexpert.com>
To: "Dmitry Volkov" <dmitry.volkov@rogers.com>
Cc: <ccielab@groupstudy.com>
Sent: Friday, June 11, 2004 4:44 PM
Subject: RE: CBWFQ in the real life
> Dmitry,
>
> It will be subject to shaping, but will be first to move from
> the shaping queue to the transmit ring. Since it is guaranteed a
> maximum of 500Kbps though, it will not be dropped from the shaping queue
> (or even delayed) unless it exceeds that rate.
>
> HTH,
>
> Brian McGahan, CCIE #8593
> bmcgahan@internetworkexpert.com
>
> Internetwork Expert, Inc.
> http://www.InternetworkExpert.com
> Toll Free: 877-224-8987 x 705
> Outside US: 775-826-4344 x 705
>
>
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of
> > Dmitry Volkov
> > Sent: Friday, June 11, 2004 8:53 AM
> > To: Brian McGahan
> > Cc: ccielab@groupstudy.com
> > Subject: RE: CBWFQ in the real life
> >
> > Won't be in this case voice traffic subject of shaping during
> congestion
> > and
> > perhaps delayed ?
> >
> > Thanks,
> > Dmitry
> >
> > > -----Original Message-----
> > > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On
> > > Behalf Of Brian McGahan
> > > Sent: Thursday, June 10, 2004 10:46 AM
> > > To: Patrick Torney; ccielab@groupstudy.com
> > > Subject: RE: CBWFQ in the real life
> > >
> > >
> > > I meant bandwidth. The class should read:
> > >
> > > policy-map RESERVE
> > > class A
> > > priority 500
> > > class B
> > > bandwidth 500
> > > class C
> > > bandwidth 1000
> > >
> > > Still early ;)
> > >
> > > Brian McGahan, CCIE #8593
> > > bmcgahan@internetworkexpert.com
> > >
> > > Internetwork Expert, Inc.
> > > http://www.InternetworkExpert.com
> > > Toll Free: 877-224-8987 x 705
> > > Outside US: 775-826-4344 x 705
> > >
> > >
> > > > -----Original Message-----
> > > > From: Patrick Torney [mailto:ptorney@satx.rr.com]
> > > > Sent: Thursday, June 10, 2004 9:41 AM
> > > > To: Brian McGahan
> > > > Subject: Re: CBWFQ in the real life
> > > >
> > > > Hi Brian:
> > > >
> > > > Why did you use 'priority xxx' under class B and C and not
> > > 'bandwidth
> > > > xxx'?
> > > > Doesn't the way you did this result in all classes sharing the
> LLQ?
> > > >
> > > > Thanks.
> > > > Pat Torney
> > > > ----- Original Message -----
> > > > From: "Brian McGahan" <bmcgahan@internetworkexpert.com>
> > > > To: <roih@012.net.il>; <ccielab@groupstudy.com>
> > > > Sent: Thursday, June 10, 2004 9:17 AM
> > > > Subject: RE: CBWFQ in the real life
> > > >
> > > >
> > > > > Roi,
> > > > >
> > > > > Configure the voice traffic in the low latency queue (priority
> > > > > statement under the class), and do a bandwidth reservation for
> > > classes B
> > > > > and C. Put this class inside another nested policy that
> > > shapes out
> > > to
> > > > > 2Mbps.
> > > > >
> > > > > Example:
> > > > >
> > > > > policy-map RESERVE
> > > > > class A
> > > > > priority 500
> > > > > class B
> > > > > priority 500
> > > > > class C
> > > > > priority 1000
> > > > >
> > > > > policy-map SHAPE
> > > > > class class-default
> > > > > shape average 2000000
> > > > > service-policy RESERVE
> > > > >
> > > > >
> > > > > The above configuration gives 500Kbps of low latency to class A,
> > > > > and guarantees at least 500Kbps and 1000Kbps for class B
> > > and class C
> > > > > respectively in the case of congestion. The congestion
> > > condition is
> > > > > bound by the outer service policy, which is shaping the
> > > aggregate of
> > > all
> > > > > classes in RESERVE to 2Mbps. In the case of the absence
> > > of traffic
> > > for
> > > > > a particular class, one or more of the other classes may use the
> > > > > bandwidth allocated to the missing class.
> > > > >
> > > > > HTH,
> > > > >
> > > > > Brian McGahan, CCIE #8593
> > > > > bmcgahan@internetworkexpert.com
> > > > >
> > > > > Internetwork Expert, Inc.
> > > > > http://www.InternetworkExpert.com
> > > > > Toll Free: 877-224-8987 x 705
> > > > > Outside US: 775-826-4344 x 705
> > > > >
> > > > >
> > > > > > -----Original Message-----
> > > > > > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On
> > > Behalf
> > > > > Of
> > > > > > roih@012.net.il
> > > > > > Sent: Thursday, June 10, 2004 5:28 AM
> > > > > > To: ccielab@groupstudy.com
> > > > > > Subject: CBWFQ in the real life
> > > > > >
> > > > > > hi group.
> > > > > >
> > > > > > I need help in CBWFQ case in the real world.
> > > > > > here it goes:
> > > > > >
> > > > > >
> > > > > > 3 classes A,B,C the first is voice.
> > > > > >
> > > > > > I have fast Ethernet interface and I need the limit it to 2M
> > > > > (that's
> > > > > > what
> > > > > > the
> > > > > > customer wants to pay).
> > > > > > in 2M I have the police the traffic the A and B will get
> > > > > > 0.5M each and C the other 1M.
> > > > > > Now for the problem: I want to be able the allocate the BW of
> > > class A
> > > > > if
> > > > > > no
> > > > > > packets of voice are arriving and use it
> > > > > > in class B, the same case from B to C.
> > > > > > So, my config file have to give me the option to use
> > > the entire BW
> > > > > even if
> > > > > > A
> > > > > > and B are empty. I've tried it in few ways (also
> > > with the new
> > > > > feature
> > > > > > "two-
> > > > > > rate
> > > > > > policer" but no success.
> > > > > > The BW remaining commands cant help here because it
> > > define the way
> > > the
> > > > > > Allocate the left BW after the classes used the BW. My
> challenge
> > > is to
> > > > > > "leak"
> > > > > > BW from class to class and not from the remaining "bank" to
> the
> > > > > classes
> > > > > >
> > > > > >
> > > > > > Experts, Any idea??
> > > > > >
> > > > > > p.s the version can be 12.3...
> > > > > >
> > > > > > Roi
> > > > > >
> > > > > >
> > > > >
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