From: Scott Morris (smorris@internetworkexpert.com)
Date: Wed Jan 07 2009 - 21:22:45 ARST
IMHO the "conforming to CIR of 1024k" doesn't leave much to the imagination.
Your shaping to 1.536M doesn't do that. It conforms to a cir of 1536k.
So while both may give the same maximum possible throughput, they both
behave differently in terms of time interval and in terms of the verbage of
the question.
HTH,
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Hobbs
Sent: Wednesday, January 07, 2009 6:15 PM
To: Tyson Scott
Cc: Cisco certification
Subject: Re: FRTS Frame-relay traffic shaping - Burst to Access Rate
Thanks Tyson. I do notice the Tc and Bc values are different, but I was just
wondering about the more general goal of "Conforming to the CIR of 1024k and
allowing burst up to access rate."
What I am getting at is that you have either have congestion or you don't.
If you don't both options give 1536k, if you do both options give you
1024k...right?
I would most likely choose #2 but I was wondering about option 1 because it
seems to act the same.
On 1/7/09, Tyson Scott <tscott@ipexpert.com> wrote:
>
> Hobbs,
>
> Here I will quickly show the output of applying each to a router
>
> R7(config-fr-dlci)#do sh traffic-sh
>
> Interface Se0/0/0
> Access Target Byte Sustain Excess Interval Increment
> Adapt
> VC List Rate Limit bits/int bits/int (ms) (bytes)
> Active
> 708 1536000 6144 1536000 0 32 6144 -
> R7(config-fr-dlci)#
>
> R7(config-fr-dlci)#class FRTS2
> R7(config-fr-dlci)#do sh traffic-sh
>
> Interface Se0/0/0
> Access Target Byte Sustain Excess Interval Increment
> Adapt
> VC List Rate Limit bits/int bits/int (ms) (bytes)
> Active
> 708 1024000 1920 10240 5120 10 1280 -
> R7(config-fr-dlci)#
>
> This should answer your question if they are different.
>
> But if you want the CIR to adjust to MINCIR you also need to apply some
> type
> of adaptive shaping otherwise it will not change. Typically you will use
> frame-relay adaptive-shaping becn.
>
> Regards,
>
> Tyson Scott - CCIE #13513 R&S and Security
> Technical Instructor - IPexpert, Inc.
>
> Telephone: +1.810.326.1444
> Cell: +1.248.504.7309
> Fax: +1.810.454.0130
> Mailto: tscott@ipexpert.com
>
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Hobbs
> Sent: Wednesday, January 07, 2009 4:23 PM
> To: Cisco certification
> Subject: FRTS Frame-relay traffic shaping - Burst to Access Rate
>
> Hello,
>
> Suppose you had a T1 frame-relay link with 1024k CIR. You need to
configure
> FRTS to conform to this, while allowing burst up to the access rate. Are
> the
> options below both accomplishing the task? As I understand, default mincir
> is half of cir so we need that argument in any case. My real question
> centers around the use of cir command.
>
> 1)
> map-class frame-relay FRTS
> frame-relay cir 1536000
> frame-relay mincir 1024000
>
> 2)
> map-class frame-relay FRTS
> frame-relay cir 1024000
> frame-relay mincir 1024000
> frame-relay bc 10240
> frame-relay be 5120
>
> thank you,
>
>
>
> Blogs and organic groups at http://www.ccie.net
>
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