> > > > > I attempted to use mmcli 1.18.6 and nmcli 1.36.0 with network manager > and keyfiles to create multiple simultaneous connections to two different > APNs with a USB cellular modem on an Ubuntu Jammy Jellyfish 22.04 system. > The ModemManager.service file had the debug and test-multiplex-requested > options activated on the ExecStart line. > > > > Short summary of results: > > > > This sequence of commands (sudo nmcli con reload, sudo nmcli --wait 300 > con up id conn1, sudo nmcli --wait 300 con up id conn2) did not produce > multiple simultaneous packet data network connections, but rather the > second connection displaced the first. > > > > Hum... you are right here, and I think I totally mixed it. > NetworkManager probably runs an explicit disconnect of all bearers in > the modem before attempting a new connection. Something to improve in > NM I'd say, we may need NM also to know about the multiplex needs of a > given device, and allow having multiple connections over the same > single device. When I tested all this a while ago, I used NM for > testing, but all those tests were checking the complex process of > getting one multiplexed connection up, not more than one :) When > testing and validating multiple multiplexed connections I used a > different small tester program that used MM APIs directly. > > So, yes, for testing all this you should probably play with mmcli and > manual IP/route settings setup :/ > > Any idea when Network Manager might be changed as described above? In 2 weeks, 2 months, or 2 years?
Thanks to Aleksander for his responses to my inquiries. Much appreciated. -Riff
