Re: Tc default value in GTS

Thank you Joe

Regards
Anantha Subramanian Natarajan

On Tue, Sep 1, 2009 at 12:32 AM, Joe Astorino <jastorino_at_ipexpert.com>wrote:

> Hey guys,
>
> It looks like it is working the way I would expect. Remember in
> frame-relay traffic-shaping the Tc is also dynamically configured by your
> router depending on what values you use for CIR and Bc based on the formula
> Tc = Bc/CIR.
> Using that formula with Bryan's examples I see the same results.
>
> 1) 7952/56000 = 0.142s
> 2) 8000/64000 = 0.125s
> 3) 128000/512000 = 0.25s
>
> So I guess we can say the "default" is .125s if that is the way you are
> configuring your CIR and Bc : )
>
>
> On Mon, Aug 31, 2009 at 9:16 AM, Anantha Subramanian Natarajan <
> anantha.natarajan_at_gravitant.com> wrote:
>
>> 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
>> >> >>> >
>> >> >>> >
>> >> _______________________________________________________________________
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>> >> >>> >
>> >> >>> >
>> >> >>> >
>> >> >>> >
>> >> >>> >
>> >> >>> >
>> >> >>> >
>> >> >>>
>> >> >>>
>> >> >>> --
>> >> >>> 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/> <
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>> >> >
>> >> > --
>> >> > 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/> <
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>> > --
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>> >
>> > -
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>> me.
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> --
> Regards,
>
> Joe Astorino - CCIE #24347 R&S
> Technical Instructor - IPexpert, Inc.
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Received on Tue Sep 01 2009 - 07:27:17 ART