Getting MC7455 static-ip to work

[Steven P]

Hi,

Working with another MC7455. When I use simple-connect with ip-type
ipv4v6, I get the following output.

Mar 03 16:26:51 excalibur ModemManager[497]: <info>  Simple connect started...
Mar 03 16:26:51 excalibur ModemManager[497]: <info>  Simple connect
state (4/8): Wait to get fully enabled
Mar 03 16:26:51 excalibur ModemManager[497]: <info>  Simple connect
state (5/8): Register
Mar 03 16:26:51 excalibur ModemManager[497]: <info>  Simple connect
state (6/8): Bearer
Mar 03 16:26:51 excalibur ModemManager[497]: <info>  Simple connect
state (7/8): Connect
Mar 03 16:26:51 excalibur ModemManager[497]: <info>  Modem
/org/freedesktop/ModemManager1/Modem/5: state changed (registered ->
connecting)
Mar 03 16:26:51 excalibur ModemManager[497]: <info>  QMI IPv4 Settings:
Mar 03 16:26:51 excalibur ModemManager[497]: <info>      Address:
100.127.167.238/30
Mar 03 16:26:51 excalibur ModemManager[497]: <info>      Gateway:
100.127.167.237
Mar 03 16:26:51 excalibur ModemManager[497]: <info>      DNS #1: 198.224.173.135
Mar 03 16:26:51 excalibur ModemManager[497]: <info>      DNS #2: 198.224.174.135
Mar 03 16:26:51 excalibur ModemManager[497]: <info>         MTU: 1428
Mar 03 16:26:52 excalibur ModemManager[497]: <info>  QMI IPv6 Settings:
Mar 03 16:26:52 excalibur ModemManager[497]: <info>      Address:
2600:1010:b01f:c448:4832:fd1a:be3a:981b/64
Mar 03 16:26:52 excalibur ModemManager[497]: <info>      Gateway:
2600:1010:b01f:c448:f565:a7c9:17d:1b1/64
Mar 03 16:26:52 excalibur ModemManager[497]: <info>      DNS #1:
2001:4888:68:ff00:608:d::
Mar 03 16:26:52 excalibur ModemManager[497]: <info>      DNS #2:
2001:4888:61:ff00:604:d::
Mar 03 16:26:52 excalibur ModemManager[497]: <info>         MTU: 1428
Mar 03 16:26:52 excalibur ModemManager[497]: <info>  Modem
/org/freedesktop/ModemManager1/Modem/5: state changed (connecting ->
connected)
Mar 03 16:26:52 excalibur ModemManager[497]: <info>  Simple connect
state (8/8): All done

I then try to configure the bearer interface's ip address:
sudo ip addr add 100.127.167.238/30 dev wwan0

Sometimes I've tried messing with the subnet mask:
sudo ip addr add 100.127.167.238/24 dev wwan0

If I try pinging 8.8.8.8, it appears as if I never get a response
back. The gateway does not respond either. Setting it up the gateway
as a default gateway does not help either.

I'm deeply suspicious that there is a misconfiguration on my side:
sudo ping -I wwan0 google.com
connect: Network is unreachable

Any advice or tips to troubleshoot? Thanks.
-- 
- Steven