Martin-Éric Racine <[email protected]> writes:

[...]
to get rid of doubts:

uwl9 - interface NOT in /etc/network/interfaces

1. put interface into usb port
2. issue "sudo /sbin/wpa_cli -g /run/wpa_supplicant/global interface_add uwl9 
/etc/wpa_supplicant/wpa_supplicant.conf"
3. issue "sudo ip link set up dev uwl9"
4. select network with "sudo wpa_cli -i uwl9"
5. affter few minutes still is:

===================
17: uwl9: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP 
group default qlen 1000
    link/ether 54:07:7d:9c:03:28 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::5607:7dff:fe9c:328/64 scope link proto kernel_ll 
       valid_lft forever preferred_lft forever
===================

important note: at first time interface sometimes get IP addr, probably
we need turn it off  and on again to observe problem.

Another example:

wilga is mobile router, which can be connected by usb and presents RNDIS
interface. No ifupdown/configuration
Issuing first time 
--8<---------------cut here---------------start------------->8---
sudo ip link set up dev wilga
--8<---------------cut here---------------end--------------->8---
we got interface properly configured,
then

- sudo ip link set down dev wilga

- plug out

- plug in again

- issue sudo ip link set up dev wilga
and still is:

--8<---------------cut here---------------start------------->8---
20: wilga: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state 
UNKNOWN group default qlen 1000
    link/ether 86:8f:d4:e1:be:ca brd ff:ff:ff:ff:ff:ff
    inet6 fe80::848f:d4ff:fee1:beca/64 scope link proto kernel_ll 
       valid_lft forever preferred_lft forever
--8<---------------cut here---------------end--------------->8---

The same command with 1:10.2.4-4 properly get address:

20: wilga: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state 
UNKNOWN group default qlen 1000
    link/ether 86:8f:d4:e1:be:ca brd ff:ff:ff:ff:ff:ff
    inet 192.168.207.160/24 brd 192.168.207.255 scope global dynamic 
noprefixroute wilga
       valid_lft 86400sec preferred_lft 75600sec
    inet6 fe80::7d75:4f39:5287:eb12/64 scope link 
       valid_lft forever preferred_lft forever


-- 
http://wolnelektury.pl/wesprzyj/teraz/
Stupidity, like virtue, is its own reward.

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