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Harald Welte laforge at gnumonks.orgHi Keith,
On Sun, Aug 19, 2018 at 04:28:32PM +0200, Keith wrote:
> > Please note that the PPP you speak is only between the modem and the ppp daemon,
> > and there is no PPP over the radio interface. The IP address allocation happens
> > via the PDP context activation on the signaling plane.
> Yep, I see this, in the PDP Context Activation Ack, we have a Packet
> Data Protocol Address with the IPv4 Address
> then there's an PPP IP Control Protocol Configuration ACK with the
> Primary and Secondary DNS.
>
> No mention of 192.168.100.101.
>
> Maybe this is just what the ppp code in the pppd or in the kernel uses
> for the dstaddr of the p-t-p link if it is not getting this info elsewhere?
No, I think it's what some component in your phone is inventing and returning
to the ppp daemon on your Linux machine :)
Many [modern] modems are doing some internal NAT so that the IP addresses on the
host PC (pppd) side don't correspond to those on the modem-sgsn side.
--
- Harald Welte <laforge at gnumonks.org> http://laforge.gnumonks.org/
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