Re: Different Between Rate-limit and traffic shape

From: Narbik Kocharians (narbikk@gmail.com)
Date: Wed Nov 26 2008 - 05:15:45 ARST

i am sorry queueing is what i was thinking

On Tue, Nov 25, 2008 at 11:14 PM, Narbik Kocharians <narbikk@gmail.com>wrote:

> Queuing
>
>
> On Tue, Nov 25, 2008 at 11:02 PM, Mark Stephanus Chandra <
> mark.chandra@gmail.com> wrote:
>
>> So You mean shaping can be done inbound on 3560 ?
>>
>>
>>
>> If I have this command
>>
>>
>>
>> Interface fa0/0
>>
>> traffic-shape 256000 8000
>>
>>
>>
>> This shape is inbound or outbound ?
>>
>>
>>
>> Regards
>>
>>
>>
>> *Mark Stephanus Chandra
>> *IT Consultant
>>
>>
>>
>> *From:* Narbik Kocharians [mailto:narbikk@gmail.com]
>> *Sent:* 26 Nopember 2008 13:28
>> *To:* Pavel Bykov
>> *Cc:* Jason Madsen; mark.chandra@gmail.com; ccielab@groupstudy.com
>>
>> *Subject:* Re: Different Between Rate-limit and traffic shape
>>
>>
>>
>> Unless shaping is done on a 3560.
>>
>> On Tue, Nov 25, 2008 at 7:23 PM, Pavel Bykov <slidersv@gmail.com> wrote:
>>
>> :) Only sometimes they don't. Beware of generalization.
>>
>> SHAPING is not possible in inbound direction.
>> QUEUING is possible in inbound direction. "hold-queue in" command changes
>> the parameters in routers on the most basic level. It is a queue where
>> packets wait to be processed by CPU in case of congestion. In switches,
>> there can be multiple input queues per port, where packets wait for
>> arbitrer
>> to grant them access to switch fabric. For example, you can place packets
>> in
>> different input queues based on their cos/dscp.
>>
>>
>>
>> On Wed, Nov 26, 2008 at 3:56 AM, Jason Madsen <madsen.jason@gmail.com
>> >wrote:
>>
>>
>> > eww yikes...I can't believe I wrote that. yes, queuing is OUTBOUND
>> > only! sorry Mark.
>> >
>> > Jason
>> >
>> >
>> > On Tue, Nov 25, 2008 at 7:53 PM, Pavel Bykov <slidersv@gmail.com>
>> wrote:
>> >
>> >> correction: Shaping does queuing only OUTBOUND. It is not possible to
>> >> shape on inbound.
>> >> Also a note, policers do not work outbound everywhere - it is
>> platform/ios
>> >> dependent.
>> >>
>> >>
>> >> On Wed, Nov 26, 2008 at 3:43 AM, Jason Madsen <madsen.jason@gmail.com
>> >wrote:
>> >>
>> >>> hopefully others will add-to once they read your posting especially if
>> I
>> >>> missed anything.
>> >>>
>> >>> where will you be testing? I take mine at RTP this coming February.
>> I
>> >>> can
>> >>> probably use the extra time, but I want to go test really badly. The
>> >>> wait
>> >>> is starting to get to me.
>> >>>
>> >>> Jason
>> >>>
>> >>> On Tue, Nov 25, 2008 at 7:31 PM, <mark.chandra@gmail.com> wrote:
>> >>>
>> >>> > Jason,
>> >>> >
>> >>> > Thank you very much, you have good explanation. Qos is my weak area
>> >>> also,
>> >>> > and multicast is the weakest :)
>> >>> >
>> >>> > Once again, thx a lot
>> >>> > ------Original Message------
>> >>> > From: Jason Madsen
>> >>> > To: Mark Stephanus Chandra
>> >>> > Cc: ccielab@groupstudy.com
>> >>> > Sent: Nov 26, 2008 08:14
>> >>> > Subject: Re: Different Between Rate-limit and traffic shape
>> >>> >
>> >>> > (again I'm no QoS expert (yet), but from what I believe to be true:)
>> >>> >
>> >>> > Yes, rate-limit is policing. It's the legacy way of doing it and It
>> >>> does
>> >>> > NOT queue / buffer...just limit the traffic rate. Unlike queuing,
>> you
>> >>> can
>> >>> > do it inbound or outbound. Traffic Shaping, however, does queuing
>> aka
>> >>> only
>> >>> > inbound.
>> >>> >
>> >>> > HTH a little
>> >>> >
>> >>> > Jason
>> >>> >
>> >>> >
>> >>> >
>> >>> >
>> >>> >
>> >>> > On Tue, Nov 25, 2008 at 6:05 PM, Mark Stephanus Chandra <
>> >>> > mark.chandra@gmail.com <mailto:mark.chandra@gmail.com> > wrote:
>> >>> > Guys.
>> >>> >
>> >>> >
>> >>> >
>> >>> > One more thing, what is the difference between rate-limit and
>> >>> > traffic-shape
>> >>> > on an interface ?
>> >>> >
>> >>> >
>> >>> >
>> >>> > Is rate-limit treat traffic like policing the traffic and
>> >>> traffic-shape
>> >>> > like
>> >>> > shaping the traffic with buffer ?
>> >>> >
>> >>> >
>> >>> >
>> >>> > Thanks a lot guys, my lab date is on two weeks, very nervous about
>> it.
>> >>> >
>> >>> >
>> >>> >
>> >>> > Regards
>> >>> >
>> >>> >
>> >>> >
>> >>> > Mark Stephanus Chandra
>> >>> > IT Consultant
>> >>> >
>> >>> >
>> >>> > Blogs and organic groups at http://www.ccie.net <
>> http://www.ccie.net>
>> >>> >
>> >>> >
>> >>>
>> _______________________________________________________________________
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>> >>> >
>> >>> >
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>> >>> >
>> >>> >
>> >>> >
>> >>> >
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>> >>>
>> >>
>> >>
>> >> --
>> >> Pavel Bykov
>> >> ----------------
>> >> Don't forget to help stopping the braindumps, use of which reduces
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>> >
>> >
>>
>> --
>>
>> Pavel Bykov
>> ----------------
>> Don't forget to help stopping the braindumps, use of which reduces value
>> of
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>>
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>>
>> _______________________________________________________________________
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>>
>>
>>
>>
>>
>>
>>
>>
>>
>> --
>> Narbik Kocharians
>> CCSI#30832, CCIE# 12410 (R&S, SP, Security)
>> www.MicronicsTraining
>> www.Net-Workbooks.com <http://www.net-workbooks.com/>
>> Sr. Technical Instructor
>>
>
>
>
> --
> Narbik Kocharians
> CCSI#30832, CCIE# 12410 (R&S, SP, Security)
> www.MicronicsTraining
> www.Net-Workbooks.com <http://www.net-workbooks.com/>
> Sr. Technical Instructor
> 

-- 
Narbik Kocharians
CCSI#30832, CCIE# 12410 (R&S, SP, Security)
www.MicronicsTraining
www.Net-Workbooks.com
Sr. Technical Instructor

Blogs and organic groups at http://www.ccie.net

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