From: Ahmed Mustafa (ahmed.mustafa@sbcglobal.net)
Date: Thu Apr 15 2004 - 17:21:10 GMT-3
Scott,
Now is my turn to pick on your brain. That is the disadvantage of being a
quaraple CCIE.
I always thought that the CIR is the agreement between Telco and the
Customer then why there will be conflict. If the agreement was to be given
512KB CIR then that should be mutually configured at both ends.
First of all, If BECN is turned on then at every congestion event the router
will throttle back 25% of CIR that I suppose is called MINCIR. Am I
correct?
Technically, if BECN is turned on then one should also define the MINCIR
typically half of CIR.
For example,
I am given CIR= 512KB
I then turn on my BECN and set my MINCIR to 256KB.
There is a congestion occurs, and my router starts throttling back 25% of
256KB, and the router will keep repeating the process until it reaches
256KB. Am I correct?
What will be the MINCIR incase if it is not defined manually, but the BECN
is set to on? In otherwords, how to configure MINCIR if it is not given.
BTW, are you in the line of becoming a second person in the world to have
(6) CCIE certification.
Regards,
Ahmed
----- Original Message -----
From: "Scott Morris" <swm@emanon.com>
To: "'ccieprep'" <ccieprep@hotmail.com>; "'David Hiers'"
<David_Hiers@adp.com>; <ccielab@groupstudy.com>
Sent: Thursday, April 15, 2004 12:01 PM
Subject: RE: FRTS -Mincir
> I would preface with that to watch the requirements of your lab or
real-ilfe
> before deciding that line speed is the way to go. Also depends on how
many
> different pvc's you have on the link!
>
> But you have the gist of it.
>
> Scott
>
> -----Original Message-----
> From: ccieprep [mailto:ccieprep@hotmail.com]
> Sent: Thursday, April 15, 2004 1:45 PM
> To: swm@emanon.com; 'David Hiers'; ccielab@groupstudy.com
> Subject: Re: FRTS -Mincir
>
> Many thanks, Dave and Scott.
>
> So the value of CIR on router should be equal to port/line speed and
MINCIR
> value should be equal to CIR subscribed from telco.
>
> cheers
> Guru Prashant
>
> ----- Original Message -----
> From: "Scott Morris" <swm@emanon.com>
> To: "'David Hiers'" <David_Hiers@adp.com>; "'ccieprep'"
> <ccieprep@hotmail.com>; <ccielab@groupstudy.com>
> Sent: Thursday, April 15, 2004 7:32 PM
> Subject: RE: FRTS -Mincir
>
>
> > It's more of a perspective thing than a 'real' definition.
> >
> > CIR from the router's perspective is what your target rate is going to
be.
> > CIR from your telco is what your guaranteed rate is going to be (which
> they
> > assume to be your target).
> >
> > In congested networks, if you've enabled the ability and receive a
> > BECN, your router will back off of that target transmission rate. The
> > MINCIR comes in from the router's perspective on "go no lower than
> > this
> threshold"
> > idea.
> >
> > Your provider doesn't care what you set for the minimum. :)
> >
> > Typical configuration would be that your perception of MINCIR is what
> > you are purchasing as a guaranteed minimum from the provider (so your
> > mincir = their cir). Your CIR may vary above that based on whatever
> > your applications and things like that are.
> >
> > From the lab's perspective, the CIR is your target rate, the mincir
> > (if
> > needed) is the "don't go below" transmission.
> >
> > HTH,
> >
> >
> > Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713,
> > CISSP, JNCIS, et al.
> > IPExpert CCIE Program Manager
> > IPExpert Sr. Technical Instructor
> > swm@emanon.com/smorris@ipexpert.net
> > http://www.ipexpert.net
> >
> >
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> > Of David Hiers
> > Sent: Thursday, April 15, 2004 12:20 PM
> > To: ccieprep; ccielab@groupstudy.com
> > Subject: RE: FRTS -Mincir
> >
> > You have to know two different "languages", Cisco and Telco
> >
> > CISCO TELCO
> > CIR LINE RATE
> > MINCIR CIR
> >
> > David
> >
> >
> > -----Original Message-----
> > From: ccieprep [mailto:ccieprep@hotmail.com]
> > Sent: Thursday, April 15, 2004 6:02 AM
> > To: ccielab@groupstudy.com
> > Subject: Re: FRTS -Mincir
> >
> >
> > Hello Group,
> >
> > Would any please tell the differnence between "mincir" and "cir". That
> > is when to use each of them.
> > I worked with Nortel and Hughes FR switches but haven't come across
> "mincir"
> > attribute. Is this proprietary to Cisco.
> >
> > TIA
> > Guru
> >
> > ______________________________________________________________________
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