[nsp] ATM encapsulations, which is best

[sthaug@nethelp.no]

> 1Mbps in cells per second is approximately 2359cps.

That depends on whether the 1 Mbps is with or without the ATM cell tax.
Cisco configuration is based on 53 bytes per cell - but only 48 bytes is
useful payload, of course.

> Ie, a T1 at 1536000bps would be 3622cps
> 
> So, no, that's not correct.  Your ISP is trying to hose you.  

The ISP may be correct. 1 Mbps IP payload is around 1104 kbps in Cisco
speak (1000*53/48).

> 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..)

aal5mux is fine if you only want to run IP, and has lower overhead than
aal5snap.

Steinar Haug, Nethelp consulting, sthaug@nethelp.no