On 09/29/2016 10:01 AM, Harald Welte wrote:
This might be off topic, but AFAIR there are PPP type PDP contexts
where not raw IP, but actual PPP frames are transmitted over GPRS inside SNDCP/LLC. Not
sure if any operators use that, but its perfectly valid.
Yes, I think this was introduced in Release 7. However, it would
require the use of "PPP" pdp type in CGDCONT, not "IP". Also, for EPS
contexts I don't believe that "PPP" type is possible (nor wanted, as
you'd fry your CPU keeping up with the high-bandwidth connection).
Probably a legacy feature that might still be used in very narrow
circumstances. I've certainly never seen it used in practice.
In this case PPP doesn't terminate in the modem, so
"hardware" support should be irrelevant.
True. But I'm probably missing your point. PPP packet compression is
still an optional protocol feature, so it should not preclude