Re: LLQ with Bandwidth MQC

All,
I have deliberately configured three classes with BW statement under a
policy-map so that it consume 75% of BW.

Fourth class I configured with priority %25. Now I could configure
service-policy out on interface by changing "max-reserve bw 76%.

I think, BW 25% command under policy-map means minimum 25% and priority 25%
means upto 25%.

What I like to confirm is that if I keep max-reserve BW 76% then only 1% of
BW will be used for LLQ?

On Wed, Nov 25, 2009 at 11:39 AM, ALL From_NJ <all.from.nj_at_gmail.com> wrote:

> If you have configured more bandwidth than what is avail, you will see the
> error message telling you that you do not have enough. You can use the
> max-reserv command to alter what is available for your configuration.
>
> The link:
>
> http://www.cisco.com/en/US/docs/ios/qos/command/reference/qos_m1.html#wp1039174
>
> By default you can only configure up to 75% of the bandwidth. Use this
> command when you want to configure more. In your example, 24% would still
> be available for class-default, aka ... unnamed traffic that does not match
> your class-maps.
>
> The percent command will be a percentage of the available bandwidth. The
> above link can also be used for looking up these commands as well.
>
> IMO, the percentage commands are very good when you are offering a service
> to another or when you want to standardize a QoS config.
>
> For example, network management traffic will always get at least 5% of the
> bandwidth or biz traffic will always get 40% of bandwidth etc ...
>
> Some service providers might offer different service levels at different
> prices. An example of these might look like:
>
> VoIP always get 25%
> Net Management always gets 5%
> Ip Prec 3 might always get 30%
> IP Prec 4 .... gets 15%
> etc ...
>
> If you are a service provider, you can apply these configs to any link and
> maintain the same service levels regardless of the actual bandwidth of the
> link. Voip will still always get 25% whether it is on a T1 or T3 ...
>
> Does this make sense? I hope my examples are clear (many times I confuse
> myself :-))
>
> HTH,
>
> Andrew Lee Lissitz
> .
> On Wed, Nov 25, 2009 at 11:18 AM, S Malik <ccie.09_at_gmail.com> wrote:
>
>> ALL,
>>
>> if I have three classes of traffic each with 25% of minimum BW and 4th
>> class
>> of traffic with priority percent 25 then all I need for the service-policy
>> command to go through under interface is "max-reserve bw 76%".
>>
>> My question is that in this case only 1% of BW will be allocated to the
>> traffic which is configured for LLQ?
>>
>>
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>>
>>
>>
>>
>>
>
>
> --
> Andrew Lee Lissitz
> all.from.nj_at_gmail.com

Blogs and organic groups at http://www.ccie.net
Received on Wed Nov 25 2009 - 13:24:05 ART