From: Michael Snyder (msnyder@xxxxxxx)
Date: Sun Aug 18 2002 - 13:55:26 GMT-3
The numbers I gave was to get to maximum data transfer between two
unequal frame-relay peers.
For example. Site One T3 connection, Site Two T1 connection with 256k
cir.
Well, I know the maximum transfer would be the T1's port speed. I also
know that the minimum transfer would be the guaranteed 256k CIR. In
order to use the maximum transfer rate, I need to set Bc to (port
speed)/8. Normally I would double Bc to get Be, but Bc would be 193000,
and doubling it would be larger than the minicir value, so using my own
judgement I'll just reuse the Bc value for Be.
The beauty of these settings is if they are a bit too large, the
adaptive-shaping will drop the rates down closer to the minicir value.
map-class frame-relay lab
frame-relay cir 1544000
frame-relay bc 193000
frame-relay be 193000
frame-relay mincir 256000
frame-relay adaptive-shaping becn
frame-relay fecn-adapt
Do you disagree?
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
ccie candidate
Sent: Sunday, August 18, 2002 10:03 AM
To: 'ccie candidate'; Michael Snyder
Cc: ccielab@groupstudy.com
Subject: RE: map-class frame-relay
the original question was what the difference between using frame
bc,be,cir and using frame traffic-rate command .
the numbers which you have given is not completely right .
CIR has nothing to do with port speed ..however the only relation
between them is CIR + EIR <=AR
where EIR =Be/8 and AR is access rate or port speed.
Mincir is the value given to you by the provider ..the only guranteed
thing here ..the rate of transfer when the network is congested .
CIR=2Mincir when you do data
CIR=Mincir for voice
Bc=CIR *Tc where Tc by default is 125 msec in case of Data
and Tc = 10 msec when you do voice .
Be=Bc when you do data
Be=0 when you do voice .
HTH
--On Sun, 18 Aug 2002 08:22:23 Michael Snyder wrote: >I think the original question was what to set the settings to. > > >frame CIR = Lowest Port Speed of either the local or remote end. >frame MINICIR = Line CIR >frame Bc, = CIR/8 >Frame Be = 2xBc > > >These are rough numbers, when I'm doing CAR or GTS, I use 3CIR/16 for bc >and 3CIR/8 for be. > >Also everything can change depending on what you using the line for. >For example a voip pvc would read something like this: > >frame CIR = Line CIR >frame MINICIR = Line CIR >frame Bc, = CIR/8 >Frame Be = Bc > >Why? Because we don't need voice traffic bursting up to the line port >speed. > >We want firm steady traffic flows for voice. > > > > > > >-----Original Message----- >From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of >ccie candidate >Sent: Sunday, August 18, 2002 5:49 AM >To: Peng Zheng; Prakash H Somani >Cc: ccielab@groupstudy.com >Subject: Re: map-class frame-relay > >traffic-shape rate is GTS >frame traffic-rate is FRTS single command for Bc,Be,CIR >frame CIR >frame Bc, >Frame Be >separate command for each parameter > >-- > >On 18 Aug 2002 08:51:23 -000 > Prakash H Somani wrote: >>Hi, >> >>in Command oen I think u want to use "Traffic-shape rate <> <> >>command". >> >>This one is GTS and when u want your traffic shaping to be applied >>to interface u should use this command. >> >>Rest is to be used uner Class=Map....to be applied to the DLCI. >> >>Friends correct me if I m wrong in my understanding. >> >>regards....Prakash >>On Sun, 18 Aug 2002 Peng Zheng wrote : >>>Hi, >>> >>>I don't know what's the relationship between >>> >>>frame-relay traffic-rate average [peak] >>> >>>and >>> >>>frame-relay cir(mir, bc,be). >>> >>>If I'm asked to configure, how can I determine which >>>one I should use or I should use both. >>> >>>Thank you for help. >>> >>>Best Wishes, >>>Peng Zheng >>> >>>
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