From: Masood Malik (malikm24@xxxxxxxxxxx)
Date: Sun Dec 24 2000 - 17:53:25 GMT-3
FYI
----- Original Message -----
From: "Masood Malik" <malikm24@hotmail.com>
To: "Michael King" <kingmi1@yahoo.com>
Sent: Monday, December 25, 2000 6:50 AM
Subject: Re: frame relay traffic shaping
> Michael,
>
> You should use the following config.
>
> interface Serial0
> no ip address
> encapsulation frame-relay
> frame-relay traffic-shaping
> frame-relay class yu
>
> map-class frame-relay yu
> frame-relay adaptive-shaping becn
> frame-relay cir 64000
> frame-relay bc 8000
> frame-relay be 16000
> frame-relay mincir 16000
>
> This will make sure the rate throttles back to 16K in case of BECN.
>
> For discard eligible bit setting above 48K use the following config. I am
> assuming your are using Ip only. If other protocols are use build the
> relivant de-list in global config and apply it to the interface config.
>
>
> frame-relay de-list 3 protocol ip gt 750
> int s 0
> frame-relay de-group 3 170
>
> note: replace 170 in the above statement with the interface DLCI.
>
> This is how it works. You want to dicard any packet above 48kbps. and your
> tc is .125s i.e 1/8th sec. Thus in one Tc you will send 48000/8 = 6000
> bits.= 750 bytes. Thus any packet larger than 750 bytes should be discard
> eligible (de). Hence the above configuration.
>
> I hope this helps.
>
> regards
> Masood
>
>
>
> ----- Original Message -----
> From: "Michael King" <kingmi1@yahoo.com>
> To: <malikm24@hotmail.com>
> Sent: Sunday, December 24, 2000 10:42 AM
> Subject: frame relay traffic shaping
>
>
> > Masood,
> >
> > I'm having trouble with this frame relay traffic
> > shaping and you seem so have a pretty good grasp the
> > way Cisco interprets it. You wrote in a groupstudy
> > mail the following:
> >
> > map-class frame-relay yu
> > frame-relay cir 64000
> > frame-relay bc 8000
> > frame-relay be 16000
> > frame-relay mincir 48000
> >
> > The way cisco interprets these is as follows:
> > CIR is the access/physical rate in your case 64k
> > mincir is the committed information rate in your case
> > 48K
> >
> > Thus when dealing with cisco routes use the new
> > terminology viz, CIR as
> > the
> > physical rate and mincir as the term for CIR which
> > telcos and you and
> > me
> > know normally. I know it is confusing but that is the
> > reality.
> >
> > for explination of bc and be look at the following
> > url, I have used bc
> > as
> > 1/8th of access rate and be double that of bc which is
> > the default
> > values
> > cisco routers use.
> >
> > http://www.cisco.com/warp/public/125/21.shtml
> >
> > regards
> > Masood Malik
> >
> > My scenario is this:
> >
> > My interval is .125s. Packets will be discard eligible
> > over 48k and discarded over 64k. I should throttle my
> > transmission rate down to 16k if I receive a BECN
> > response. Is the above config that you suggested the
> > appropriate config for my scenario? If so, does the
> > rate coming down to 16k not affect anything? Please
> > help!!!
> >
> > Mike
> >
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