[nsp] ATM encapsulations, which is best

[Temkin, David]

1Mbps in cells per second is approximately 2359cps.

The algorhythm to figure CPS in an almost exact number is to take the kbps
and divide by 424

Ie, a T1 at 1536000bps would be 3622cps

So, no, that's not correct.  Your ISP is trying to hose you.  

Aal5snap is fine.  Aal5ciscoppp just adds overhead you don't need for a
straight IP link unless you need to do TCP or RTP header compression (which
I doubt..)

-Dave

(see
http://www.paradyne.com/technical_manuals/OpenLane_Help/Kbps_to_Cells_Per_Se
cond_Conversion.htm)

> -----Original Message-----
> From: TMS [mailto:tomek@absolut.vinyl.pl] 
> Sent: Thursday, November 21, 2002 12:00 PM
> To: cisco-nsp@puck.nether.net
> Subject: [nsp] ATM encapsulations, which is best
> 
> 
> Hello
> 
> I have connection to my ISP via ATM OC3c fiber optic link. 
> Link capacity is 10Mbps IP.
> 
> My ISP declared that "1Mbps IP = 1100 PCR in Kbps" (vbr-nrt 
> as ATM contract. Is this setting is correct ?
> 
> This ATM/AAL5 encapsulation is best for point-to-point ATM 
> links ? For now I using "aal5snap", but maybe "aal5mux ip" or 
> "aal5ciscoppp" is better for IP link ? Is any good document 
> which describes diffrences between ATM/aal5 encapsulations 
> (aal5snap, aal5mux, aal5ciscoppp) ?
> 
> --
> TMS
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> http://puck.nether.net/mailman/listinfo/cisco-> nsp
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> 


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