Re: IPv6 link local address missing on wwan0 interface?

[Thomas Schäfer <tschaefer t-online de>]

Hi,

I can confirm this observation at my k5160(mbim-mode):

3: wwp0s20u1c2: <BROADCAST,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc 
pfifo_fast state UNKNOWN group default qlen 1000
    link/ether fe:e0:9a:00:0e:7b brd ff:ff:ff:ff:ff:ff
    inet 10.198.157.187/29 brd 10.198.157.191 scope global wwp0s20u1c2
       valid_lft forever preferred_lft forever
    inet6 2a01:598:90a0:44a8:1ca1:f817:2351:ba66/64 scope global temporary 
dynamic 
       valid_lft 604623sec preferred_lft 86097sec
    inet6 2a01:598:90a0:44a8:fce0:9aff:fe00:e7b/64 scope global mngtmpaddr 
dynamic 
       valid_lft forever preferred_lft forever
    inet6 2a01:598:90a0:44a8:5a2c:80ff:fe13:9208/64 scope global 
       valid_lft forever preferred_lft forever


Despite the device  has no link local address - for routing link local address 
is used:
ip -6 r 
2a01:598:90a0:44a8::/64 dev wwp0s20u1c2 proto kernel metric 256 pref medium
default via fe80::4e54:99ff:fe45:e5d5 dev wwp0s20u1c2 proto ra metric 1024 
expires 8325sec pref medium



With an older mbim-modem (k5150) the behavior is different:

ip a
4: wwp0s20u1c2: <BROADCAST,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc 
pfifo_fast state UNKNOWN group default qlen 1000
    link/ether fe:e0:9a:00:0e:7b brd ff:ff:ff:ff:ff:ff
    inet 10.77.249.102/30 brd 10.77.249.103 scope global wwp0s20u1c2
       valid_lft forever preferred_lft forever
    inet6 2a01:598:b00a:566e:506f:7629:bcca:66b6/64 scope global temporary 
dynamic 
       valid_lft 604523sec preferred_lft 85548sec
    inet6 2a01:598:b00a:566e:8b97:6dae:5a1d:501d/64 scope global mngtmpaddr 
noprefixroute 
       valid_lft forever preferred_lft forever
    inet6 fe80::49f8:5b75:b302:a43c/64 scope link 
       valid_lft forever preferred_lft forever

ip -6 r
fe80::4e54:99ff:fe45:e5d5 dev wwp0s20u1c2 proto static metric 700 pref medium
fe80::/64 dev wwp0s20u1c2 proto kernel metric 256 pref medium
default via fe80::4e54:99ff:fe45:e5d5 dev wwp0s20u1c2 proto static metric 700 
pref medium


I used "tumbleweed" wit mm 1.6.8 and nm 18.2



Both modems work.

Regards,

Thomas