connecting with IPv6?

[Henri Sundelin]

I'm trying to get an u-Blox R410M connected via IPv6, but I'm not having 
success to get wwan0 configured. Everything however works OK with IPv4 - 
but that does not fulfill our requirements.

The link seems ok:

# qmicli -d /dev/cdc-wdm0 --wds-get-current-settings
[/dev/cdc-wdm0] Current settings retrieved:
 Â Â Â Â Â Â Â Â Â Â  IP Family: IPv6
 Â Â Â Â Â Â Â  IPv6 address: 2001:14bb:210:64:7912:2e56:d982:8e8e/64
IPv6 gateway address: 2001:14bb:210:64:30c9:f332:6337:dc2f/64
 Â Â Â  IPv6 primary DNS: 2001:14b8:1000::1
 Â  IPv6 secondary DNS: 2001:14b8:1000::2
 Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â  MTU: 1500
 Â Â Â Â Â Â Â Â Â Â Â Â  Domains: none

but wwan0 is not:

# ifconfig wwan0
wwan0: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST>Â  mtu 1500
 Â Â Â Â Â Â Â  unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00Â  
txqueuelen 1000Â  (UNSPEC)
 Â Â Â Â Â Â Â  RX packets 43Â  bytes 2123 (2.0 KiB)
 Â Â Â Â Â Â Â  RX errors 0Â  dropped 0Â  overruns 0Â  frame 0
 Â Â Â Â Â Â Â  TX packets 3Â  bytes 984 (984.0 B)
 Â Â Â Â Â Â Â  TX errors 0Â  dropped 0 overruns 0Â  carrier 0 collisions 0

Trying dhcp6 fails:

# udhcpc6 -v -i wwan0
udhcpc6: can't get link-local IPv6 address

I also tried setting address of wwan0 manually, but that says 
"permission denied".

I'm running this on latest raspbian (rpi3), kernel 4.19.75-v7+. qmicli 
says version 1.22.0.

Has anyone tried something like this lately?


//Henri