RE: Tc default value in GTS

For CIR less than 320kbps, default Bc is 8000bits and Tc is calculated based
on the Bc/CIR ratio.
For CIR greater than 320Kbps, default Bc is calculated based on a default Tc
value of 0.125sec =1/8th Sec. These are Cisco defaults.

Swap
#19804

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
Anantha Subramanian Natarajan
Sent: Monday, August 31, 2009 5:16 PM
To: Mark Matters; Cisco certification
Subject: Re: Tc default value in GTS

Hi Mark,

  Sure ,I learned that,in GTS,by default Tc is a variable and able
to conclude from Bryan,Divin that it does varies in proportion to Bc and
CIR.

Thanks

Regards
Anantha Subramanian Natarajan

On Mon, Aug 31, 2009 at 7:56 AM, Mark Matters <markccie_at_gmail.com> wrote:

> Anantha,
> Share what you learned.
>
>
> On Sun, Aug 30, 2009 at 5:45 PM, Anantha Subramanian Natarajan <
> anantha.natarajan_at_gravitant.com> wrote:
>
>> Thanks Bryan ....Actually I to derived this understanding from DQOS
>> book..Thank you once again
>>
>> Regards
>> Anantha Subramanian Natarajan
>>
>> On Sun, Aug 30, 2009 at 4:42 PM, Bryan Bartik <bbartik_at_ipexpert.com>
>> wrote:
>>
>> > Good question. The only other information I have is from the QoS Exam
>> > Guide, p355:
>> >
>> > "The Tc value defaults to 125 ms, but interestingly, GTS can use
>> different
>> > default Tc values, based on the configuration settings you use."
>> >
>> > Perhaps someone else can shed some light on the reason...
>> >
>> >
>> > On Sun, Aug 30, 2009 at 3:34 PM, Anantha Subramanian Natarajan <
>> > anantha.natarajan_at_gravitant.com> wrote:
>> >
>> >> Hi Bryan,
>> >>
>> >> Thank you very much and whats the logic behind the Tc varying....to
>> what
>> >> parameters it varies to .
>> >>
>> >> Thanks
>> >>
>> >> Regards
>> >> Anantha Subramanian Natarajan
>> >>
>> >> On Sun, Aug 30, 2009 at 4:11 PM, Bryan Bartik <bbartik_at_ipexpert.com
>> >wrote:
>> >>
>> >>> It appears to be variable:
>> >>>
>> >>> R1(config-if)#int s1/1
>> >>> R1(config-if)#traffic-shape rate 56000
>> >>> R1(config-if)#do sho traf
>> >>>
>> >>> Interface Se1/1
>> >>> Access Target Byte Sustain Excess Interval Increment
>> >>> Adapt
>> >>> VC List Rate Limit bits/int bits/int (ms) (bytes)
>> >>> Active
>> >>> - 56000 1988 7952 7952 142 994
>> -
>> >>>
>> >>> R1(config-if)#traffic-shape rate 64000
>> >>> R1(config-if)#do sho traf
>> >>>
>> >>> Interface Se1/1
>> >>> Access Target Byte Sustain Excess Interval Increment
>> >>> Adapt
>> >>> VC List Rate Limit bits/int bits/int (ms) (bytes)
>> >>> Active
>> >>> - 64000 2000 8000 8000 125 1000
>> -
>> >>>
>> >>> R1(config-if)#traffic-shape rate 96000
>> >>> R1(config-if)#do sho traf
>> >>>
>> >>> Interface Se1/1
>> >>> Access Target Byte Sustain Excess Interval Increment
>> >>> Adapt
>> >>> VC List Rate Limit bits/int bits/int (ms) (bytes)
>> >>> Active
>> >>> - 96000 1992 7968 7968 83 996
>> -
>> >>>
>> >>> R1(config-if)#traffic-shape rate 512000
>> >>> R1(config-if)#do sho traf
>> >>>
>> >>> Interface Se1/1
>> >>> Access Target Byte Sustain Excess Interval Increment
>> >>> Adapt
>> >>> VC List Rate Limit bits/int bits/int (ms) (bytes)
>> >>> Active
>> >>> - 512000 3200 12800 12800 25 1600
>> -
>> >>> R1(config-if)#
>> >>>
>> >>> -hth
>> >>>
>> >>> On Sun, Aug 30, 2009 at 12:06 PM, Anantha Subramanian Natarajan <
>> >>> anantha.natarajan_at_gravitant.com> wrote:
>> >>>
>> >>> > Hi All,
>> >>> >
>> >>> > When I was going through the Generic Traffic Shaping (GTS) ,I am
>> >>> seeing 2
>> >>> > different things,in one place I am seeing the default Tc value is
>> 125ms
>> >>> > while summarizing the difference between different shaping
methods,I
>> am
>> >>> > seeing the default Tc value as "Variable" for GTS.Kindly provide me
>> an
>> >>> > insight on the same.
>> >>> >
>> >>> > Thanks for the help
>> >>> >
>> >>> > Regards
>> >>> > Anantha Subramanian Natarajan
>> >>> >
>> >>> >
>> >>> > Blogs and organic groups at http://www.ccie.net
>> >>> >
>> >>> >
>> _______________________________________________________________________
>> >>> > Subscription information may be found at:
>> >>> > http://www.groupstudy.com/list/CCIELab.html
>> >>> >
>> >>> >
>> >>> >
>> >>> >
>> >>> >
>> >>> >
>> >>> >
>> >>> >
>> >>>
>> >>>
>> >>> --
>> >>> Bryan Bartik
>> >>> CCIE #23707 (R&S), CCNP
>> >>> Sr. Support Engineer - IPexpert, Inc.
>> >>> URL: http://www.IPexpert.com <http://www.ipexpert.com/> <
>> http://www.ipexpert.com/>
>> >>>
>> >>>
>> >>> Blogs and organic groups at http://www.ccie.net
>> >>>
>> >>>
>> _______________________________________________________________________
>> >>> Subscription information may be found at:
>> >>> http://www.groupstudy.com/list/CCIELab.html
>> >>>
>> >>>
>> >>>
>> >>>
>> >>>
>> >>>
>> >>>
>> >>>
>> >>
>> >
>> >
>> > --
>> > Bryan Bartik
>> > CCIE #23707 (R&S), CCNP
>> > Sr. Support Engineer - IPexpert, Inc.
>> > URL: http://www.IPexpert.com <http://www.ipexpert.com/> <
>> http://www.ipexpert.com/>
>>
>>
>> Blogs and organic groups at http://www.ccie.net
>>
>> _______________________________________________________________________
>> Subscription information may be found at:
>> http://www.groupstudy.com/list/CCIELab.html
>>
>>
>>
>>
>>
>>
>>
>>
>
>
> --
>
>
> -
> "The more I learn the less I know". This is incredibly frustrating to me.

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Received on Wed Sep 02 2009 - 02:36:47 ART