Re: 3560 SRR sharing bandwidth

any way by default only dscp 40-47 are mapped to the queue 1 on a 2960
switch (just checked), thinking should be the same on 3560;
usng-mwr-h2-usw01#show mls qos maps dscp-output-q
   Dscp-outputq-threshold map:
     d1 :d2 0 1 2 3 4 5 6 7 8 9
     ------------------------------------------------------------
      0 : 02-01 02-01 02-01 02-01 02-01 02-01 02-01 02-01 02-01 02-01
      1 : 02-01 02-01 02-01 02-01 02-01 02-01 03-01 03-01 03-01 03-01
      2 : 03-01 03-01 03-01 03-01 03-01 03-01 03-01 03-01 03-01 03-01
      3 : 03-01 03-01 04-01 04-01 04-01 04-01 04-01 04-01 04-01 04-01
      4 : 01-01 01-01 01-01 01-01 01-01 01-01 01-01 01-01 04-01 04-01
      5 : 04-01 04-01 04-01 04-01 04-01 04-01 04-01 04-01 04-01 04-01
      6 : 04-01 04-01 04-01 04-01

On Sun, Jun 27, 2010 at 7:59 AM, Piotr Kaluzny <piotrk_at_ipexpert.com> wrote:

> It then makes perfect sense to map only a particular set of traffic (e.g.
> EF) to this queue.
>
> Regards,
> Piotr
>
>
> On Sun, Jun 27, 2010 at 9:40 AM, Matt Eason <matt.d.eason_at_gmail.com>wrote:
>
>> Yes that is correct. Once the priority-queue out command is applied Q1 has
>> no bandwidth restriction.
>>
>> On Sun, Jun 27, 2010 at 8:21 AM, manoj nanda <mnanda62_at_gmail.com> wrote:
>>
>> > Guys: I am wondering if there is a way to police the traffic for the
>> > priority queue (queue-1 in this case).For example, if we use
>> > "priority-queue
>> > out" in this configuration, how do we avoid starving of other queues.
>> Based
>> > on my reading it appears that the moment you put this command
>> > "priority-queue out" Q-1 becomes the king and can use whatever bandwidth
>> it
>> > demands ignoring the shaping/sharing command !!
>> > Any guidance will be greatly appreciated!
>> > r/Manoj
>> >
>> > On Tue, Jun 22, 2010 at 6:31 PM, m.lammerse <m.lammerse_at_mac.com> wrote:
>> >
>> > > Hi Group,
>> > >
>> > > I'm trying to clarify my understanding of 3560 SRR shaping and
>> > > sharing. If I have both configured, as per below:
>> > >
>> > > Switch(config)# interface
>> > > gigabitethernet0/1
>> > > Switch(config-if)# srr-queue bandwidth shape 8 0 0 0
>> > > Switch(config-if)# srr-queue bandwidth share 4 4 4 4
>> > >
>> > > Will queues 2,3 and 4 be
>> > > able to use bandwidth that is reserved for queue 1 if queue 1 doesn't
>> > need
>> > > it?
>> > >
>> > > I understand that queue 1 will be guaranteed and limited to 1/8 of
>> > > 1Gbps. But what will be the bandwidth available for 2, 3 and 4? Is it
>> > > 4/(4+4+4) * interface speed (1Gbps). Or is it 4/(4+4+4) * remaining
>> > > bandwidth
>> > > (1Gbps-125Mbps)?
>> > >
>> > > Best regards,
>> > > Marcel
>> > >
>> > >
>> > > Blogs and organic groups at http://www.ccie.net
>> > >
>> > >
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>
>
> --
> Piotr Kaluzny
> CCIE #25665 (Security), CCSP, CCNP
> Sr. Support Engineer - IPexpert, Inc.
> URL: http://www.IPexpert.com

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Received on Sun Jun 27 2010 - 08:14:33 ART