Hi 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.