Re: 3560 SRR sharing bandwidth

Thanks to all who responded. Unfortunately the cisco documentation is not very clear on this subject. I would expect that the bandwidth allocated to the shaped queue would be available to the shared queues if it is not used.

I'll lab it up as soon as I get a chance!
 
Marcel

Sent from my iPad

On 23/06/2010, at 8:03 PM, Carlos G Mendioroz <tron_at_huapi.ba.ar> wrote:

> Narbik,
> he is asking for queues 2,3 and 4, not for Q1.
>
> The doc I reviewed does not tell, but I guess that Q2, Q3 & Q4 can use
> Q1's bandwidth if no traffic is there, so it would be 1/3 of remaining
> BW, whatever that is (i.e. not necessarily 1G - 125k).
>
> -Carlos
>
> Narbik Kocharians @ 22/06/2010 19:44 -0300 dixit:
>> Remember that shape overrides share, and 1/8th of the bandwidth is assigned
>> to Q1.
>>
>> On Tue, Jun 22, 2010 at 3:31 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
>>>
>>>
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>>
>
> --
> Carlos G Mendioroz <tron_at_huapi.ba.ar> LW7 EQI Argentina

Blogs and organic groups at http://www.ccie.net
Received on Wed Jun 23 2010 - 22:10:08 ART