Re: Need help in QOS

Hey yall,

QoS is an area I need to work on ... thanks for this discussion. Dale
rocks! So would be good to get Dale to weigh in here too.

Yeah, I think offering 6 classes for your customers is fairly common. You
keep one for real time traffic and one for Net management. Real time should
be w/ the priority command and net man can be with the bw remaining percent
command ... should not need much for this class; maybe like 5% ?

Within the other classes you can also configure wred, dscp-based, also
define bw percent remaining for each of these classes. Having wred in each
class will offer you some granularity within each class. You can get pretty
deep in your customer markings and assigning the wred dscp values for each
each class.

Does this mean you 'kind of' have more than 6 classes to offer for your
customers? Not really ... but it does offer you quite a bit of granularity
and allows for you to offer some customers better service within each queue
/ class.

On a side note, you need to make sure the ASR uses pak_priority for local
control traffic. It should. Just want to make sure this is not being put
into the class-default as once you define an outgoing policy, you might be
hurting yourself too.

Unless the customer states otherwise, I would suggest to define or allow FTP
to fall into the scavenger class, police it, and wred it. FTP will always
use as much bandwidth as it can ... no doubt about it, FTP will fill the
link any chance it can.

Lastly, you will need to change the max reserved bw to allow you to
configure 100%. The bw reamining percents should equal 100% when all is
said and done.

Just some thougths, hope these make sense. Appreciate the back and forth.
Take it easy team,

Andrew

On Sun, May 17, 2009 at 8:49 AM, hafiz atif <oops.com_at_gmail.com> wrote:

>
> the 2nd options is workable to have predefined policies for different
> markings and mark customers accordingly. But this will again give me only 8
> different bandwidth assignments which can cover more customers
> comparatively. Any more suggestions to make it more scalable?
>
> There is another point on which i need some suggestions. How can we control
> the incoming traffic? Lets say, one of the customers is requesting a
> download from a public FTP server. The ftp server is now sending at a rate
> greater than my internet bandwidth, now even if i police this download
> traffic on my router, my external link has already been used. Is there any
> work around for this? please advice!
>
> Best regards!
>
>
> On 5/17/09, ALL From_NJ <all.from.nj_at_gmail.com> wrote:
>>
>> Thinking out loud here and way too tired ... sorry if this is too far
>> off.
>>
>> Any chance that configuring nested service policies will provide more
>> scale? I do not know the limit to the number of nested policies within a
>> parent policy ... Basically you could create one policy-map per customer.
>> Add this to a parent policy-map with shaping configured.
>>
>> Another thought might be to configure qos on a per customer basis and
>> shape, protect, and remark all packets as needed on a per customer basis.
>> On the uplink, simply configure a single policy which provides different qos
>> levels for all traffic going.
>>
>> You could provide 6 or 7 classes for customers, and keep at least one
>> class for net management. Just a thought ...
>>
>> Not sure this helps much ... time for my bed time ... in NJ, it is a bit
>> too late for me. Have a good night,
>>
>> Andrew Lee Lissitz
>>
>>
>>
>>
>> On Sun, May 17, 2009 at 1:52 AM, Dale Shaw <dale.shaw_at_gmail.com> wrote:
>>
>>> Hi again,
>>>
>>> On Sun, May 17, 2009 at 3:40 PM, hafiz atif <oops.com_at_gmail.com> wrote:
>>> >
>>> > I can't change the speed to 10 mbps because we are planning to increase
>>> the
>>> > speed upto 16mbps.
>>>
>>>
>>> In that case, even 100Mbps is better than 1Gbps. Can you interface do
>>> 100M, or 1000M only? I appreciate that some 1000BASE-x interfaces are
>>> 1000-only.
>>>
>>> cheers,
>>> Dale
>>>
>>>
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>>
>>
>>
>> --
>> Andrew Lee Lissitz
>> all.from.nj_at_gmail.com
>>
>
>

-- 
Andrew Lee Lissitz
all.from.nj_at_gmail.com
Blogs and organic groups at http://www.ccie.net