From: Scott Morris (swm@emanon.com)
Date: Mon Nov 07 2005 - 12:21:29 GMT-3
That would be a good point. EIR = Extended (or Excess) Information Rate
which would where that could let you know what your shaping cir would be.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
kevin gannon
Sent: Monday, November 07, 2005 10:18 AM
To: Scott Morris
Cc: Wang, Ting (Taylor); ccielab@groupstudy.com
Subject: Re: relationship between CISCO CIR / MinCIR and Telco CIR
In ireland at least minir = SP CIR and they do *not* allow you to burst to
port speed. You can buy EIR burst however .
Regards
Kevin
On 11/7/05, Scott Morris <swm@emanon.com> wrote:
> That's always the catch! Most frame-relay providers will allow you to
> "burst to port speed" or at least burst above the CIR they sell you.
>
> The key concept to remember is that the CIR you buy from your SP is a
> guarantee, which logically means you shouldn't ever need to go BELOW
> that, since you paid for it! Now, how much above that you will
> consistently get through the line (since, as you note, it's flagged
> DE) becomes sort of a game. The "cir" that Cisco pegs is one that we
> need to engineer (fancy word for guessing with a few tests involved).
> That's the target that we can reasonably acheieve.
>
> The mincir we set on our routers is that minimum level to back off to
> if there's congestion. It certainly shouldn't be anything lower than
> what we pay for and are guaranteed to get.
>
> In the lab, do whatever the lab tells you! In real life, there's some
> playing around, and if whatever you come up with doesn't consistently
> work for you, then you either need to pick different numbers, or pay
> for more cir from the SP.
>
> It's all a game though.
>
> Scott
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of Wang, Ting (Taylor)
> Sent: Monday, November 07, 2005 5:04 AM
> To: ccielab@groupstudy.com
> Subject: relationship between CISCO CIR / MinCIR and Telco CIR
>
> Hi All,
> I was told "The miniCIR is Cisco concept, it is actually CIR of
> Telco! if Cisco router sends out data over miniCIR, the Telco thinks
> it is over normal CIR!!! so DE is marked."
> If miniCIR is actually CIR of Telco, how should we select the CIR
> value of the CISCO box?
>
> Thanks,
> Taylor
>
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