From: Huan Pham (pnhuan@yahoo.com)
Date: Fri Sep 12 2008 - 23:35:01 ART
Hi Scott,
What you said does make sense.
However, if there're more than one PVCs, then in case of interface congestion
(introduced by traffic going to one particular PVC), we may want to protect
traffic going to other PVCs and by limiting less important traffic going
to one particular PVC. Does this make sense as well?
Can you please comment on the below example from the Command Reference which
is directly relevant to the question being asked. Did you mean that the below
information is wrong?
http://cisco.com/en/US/docs/ios/wan/configuration/guide/wan_afrt_shp_ic_ps635
0_TSD_Products_Configuration_Guide_Chapter.html
Frame Relay Adaptive Traffic Shaping for Interface Congestion Example
In the following example, the rate of traffic destined for PVC 200 will be
reduced to the minCIR if the number of packets in the interface queue exceeds
10. When the number of packets in the interface queue drops below 10, then the
traffic rate will immediately return to the CIR.
interface serial0
encapsulation frame-relay
frame-relay traffic-shaping
frame-relay interface-dlci 200
class adjust_vc_class_rate
!
map-class frame-relay adjust_vc_class_rate
frame-relay cir 64000
frame-relay mincir 32000
frame-relay adaptive-shaping interface-congestion 10
--- On Sat, 9/13/08, Scott Morris <smorris@internetworkexpert.com> wrote:
From: Scott Morris <smorris@internetworkexpert.com>
Subject: RE: Shaping
To: "'Ali Mousawi'" <mousawi.ali@gmail.com>, "'Julian Pentermann'"
<jpentermann@gmail.com>
Cc: "'Cisco certification'" <ccielab@groupstudy.com>
Date: Saturday, September 13, 2008, 7:03 AM
"congestion" is a multi-faceted idea.
Congestion in an outbound direction (e.g. your side) will not lead to
mincir. That would be silly. If you are having congestion, what would you
expect if you further reduced your transmission capabilities! :)
Congestion from the frame cloud though is different. A FECN/BECN can signal
there is congestion occurring, in which case it would make perfect sense to
limit the outbound transmssion rate.
HTH,
Scott Morris, CCIE4 #4713, JNCIE-M #153, JNCIS-ER, CISSP, et al.
CCSI/JNCI-M/JNCI-ER
Senior CCIE Instructor
smorris@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987
Outside US: 775-826-4344
Online Community: Tiny + /6dmnsu
CCIE Blog: Tiny + /2nxxaq
Knowledge is power.
Power corrupts.
Study hard and be Eeeeviiiil......
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Ali
Mousawi
Sent: Friday, September 12, 2008 4:55 PM
To: Julian Pentermann
Cc: Cisco certification
Subject: Re: Shaping
Thanks for the reply.
I have read some where that adaptive-shaping is used in conjuction with
mincir. Up to my understanding if there is congestion shaping will drop to
mincir .. is that right? but the interface-congestion is new to me can u
please elaborate a bit on that.
Thanks
On Fri, Sep 12, 2008 at 1:45 PM, Julian Pentermann
<jpentermann@gmail.com>wrote:
> Configure adaptive shaping under your map-class as follows
> frame-relay adaptive-shaping interface-congestion 11
>
> im assuming you know the basic FRTS config.
>
> Cheers,
> Julian
>
>
> On Fri, Sep 12, 2008 at 10:38 PM, Ali Mousawi
<mousawi.ali@gmail.com>wrote:
>
>> Hello,
>>
>> Task: Limit HTTP traffic to 256kbps on the fram-relay link.Traffic
>> should drop to min CIR when the queue contains more than 10 packets
>> (Do not use
>> MQC)
>>
>> I am stuck.. any clues??
>>
>> Regards
>> Ali
>>
>>
>> Blogs and organic groups at http://www.ccie.net
>>
>> _____________________________________________________________________
>> __ Subscription information may be found at:
>> http://www.groupstudy.com/list/CCIELab.html
Blogs and organic groups at http://www.ccie.net
This archive was generated by hypermail 2.1.4 : Sat Oct 04 2008 - 09:26:18 ART