Re: Need some guidance---QOS

From: Anthony Sequeira <asequeira_at_internetworkexpert.com>
Date: Wed, 6 May 2009 22:28:01 -0400

Use the MQC method for sure!

In fact, you are going to engage in Class Based Weighted Fair Queueing
here (CBWFQ). It just so happens that this is what the MQC was
originally invented for!

You will identify your traffic using Class Maps (Step 1), do your
bandwidth reservations in a Policy Map (Step 2), and then assign the
reservations to an interface in Service Policy (Step 3).

Be careful, in your example - you have a 10 Mbps link, and you are
doing bandwidth reservations for the full link bandwidth. Adjust the
numbers down accordingly to make room for your other traffic forms,
specifically router control traffic. Cisco tells us we should not
reserve more that 75% of the link bandwidth.

You might ask - hey - can WWW traffic use more bandwidth if it is
available???? The answer - yes indeed!

Here is a link for more details on your desired configuration:

http://www.cisco.com/en/US/docs/ios/12_0t/12_0t5/feature/guide/cbwfq.html

Warmest Regards,

Anthony J. Sequeira, CCIE #15626
Senior CCIE Instructor
http://www.InternetworkExpert.com

Internetwork Expert, Inc.
Toll Free: 877-224-8987
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Test your Core Knowledge today!
Q: What general strategy should you follow for the classification and
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A: Marking should be done as close to the source as possible.
More Info: http://www.ciscopress.com/articles/article.asp?p=101170&seqNum=2

On May 6, 2009, at 10:05 PM, sajid mavani wrote:

> Hello Seniors,
>
> Couuld you please reply to me, I am eagerly waiting for your response.
>
> Have a pleasant day.
>
>
> Regards
>
> Sam
>
>
> On 5/7/09, sajid mavani <sajidmavani_at_gmail.com> wrote:
>>
>> Hello Seniors,
>>
>> Please guide me , I need some suggestions.. I am totally confused
>> at the
>> momemnt.
>>
>> I wanted to priortize & customize ( bandwisth reservation) the
>> traffic so
>> that it gets limited amout of bandwidth & high priority at the time
>> of
>> congestion.
>>
>> Scenario... I have a 10 mbs link on a interface.. ( dummy scenraio)
>>
>> a) reserve 5 mbps for my web traffic. www
>> b) reserve 3 mbps for my ftp traffic ftp
>> c) reserve 2 mbps for my telnet traffic. telnet
>> d) condition would be that i want to reserve bandwidth & do
>> priortization
>> together either in the legacy qos or MQC way.
>>
>>
>>
>> I thought of doing custom queueing with priotiozation in this manner.
>>
>> queue-list 1 protocol ip 1 tcp ftp.
>> queue-list 1 protocol ip 2 tcp telnet
>> queue-list 1 protocol ip 3 tcp www
>>
>>
>> queue-list 1 queue 1 byte-count 5000 (bytes)
>> queue-list 1 queue 2 byte-count 3000
>> queue-list 1 queue 3 bytecount 2000
>>
>> I could use the priority queue 0 for traffic protization...........
>>
>>
>> and than use the queue-list 1 (lowest-custom) 2 ( next to follow in
>> sequence after queue 0 is used)
>>
>> kindly let me know if my configuration is correct.
>>
>> Please let me know how would priortize & reserve bandwidth both
>> together in
>> the MQC ...
>>
>>
>> Thanks for all your ongoing help......... group study rock :)
>>
>> Have a pleasant day.
>>
>>
>> Regards
>>
>> Sam
>
>
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Received on Wed May 06 2009 - 22:28:01 ART

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