Linux 7 Configuring a USB Network Adapter: Difference between revisions
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Jan 4 22:01:59 now510 NetworkManager[842]: <info> (enp15s0u2): device state change: unavailable -> disconnected (reason 'none') [20 30 0] | Jan 4 22:01:59 now510 NetworkManager[842]: <info> (enp15s0u2): device state change: unavailable -> disconnected (reason 'none') [20 30 0] | ||
Jan 4 22:01:59 now510 kernel: IPv6: ADDRCONF(NETDEV_UP): enp15s0u2: link is not ready | Jan 4 22:01:59 now510 kernel: IPv6: ADDRCONF(NETDEV_UP): enp15s0u2: link is not ready | ||
</pre> | |||
and the interface shows up in the list reported by <tt>ip</tt>: | |||
<pre> | |||
[root@now510 ~]# ip addr show | |||
1: lo: <LOOPBACK,UP,LOWER_UP> [...] | |||
2: enp0s25: <BROADCAST,MULTICAST,UP,LOWER_UP> [...] | |||
3: wlp3s0: <BROADCAST,MULTICAST> [...] | |||
4: enp15s0u2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000 | |||
link/ether ac:7f:3e:e5:40:39 brd ff:ff:ff:ff:ff:ff | |||
</pre> | </pre> | ||
Revision as of 06:09, 5 January 2016
Internal
Overview
A USB network adapter is usually detected automatically upon attachment. /var/log/messages is updated as follows:
Jan 4 22:01:58 now510 kernel: usb 1-2: new high-speed USB device number 2 using xhci_hcd Jan 4 22:01:58 now510 kernel: usb 1-2: New USB device found, idVendor=05ac, idProduct=1402 Jan 4 22:01:58 now510 kernel: usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Jan 4 22:01:58 now510 kernel: usb 1-2: Product: Apple USB Ethernet Adapter Jan 4 22:01:58 now510 kernel: usb 1-2: Manufacturer: Apple Inc. Jan 4 22:01:58 now510 kernel: usb 1-2: SerialNumber: 282AE1 Jan 4 22:01:59 now510 kernel: asix 1-2:1.0 eth0: register 'asix' at usb-0000:0f:00.0-2, ASIX AX88772 USB 2.0 Ethernet, ac:7f:3e:e5:40:39 Jan 4 22:01:59 now510 kernel: usbcore: registered new interface driver asix Jan 4 22:01:59 now510 NetworkManager[842]: <warn> (eth0): failed to find device 4 'eth0' with udev Jan 4 22:01:59 now510 NetworkManager[842]: <info> (eth0): new Ethernet device (carrier: OFF, driver: 'asix', ifindex: 4) Jan 4 22:01:59 now510 NetworkManager[842]: <info> (eth0): interface index 4 renamed iface from 'eth0' to 'enp15s0u2' Jan 4 22:01:59 now510 NetworkManager[842]: <info> (enp15s0u2): device state change: unmanaged -> unavailable (reason 'managed') [10 20 2] Jan 4 22:01:59 now510 kernel: IPv6: ADDRCONF(NETDEV_UP): enp15s0u2: link is not ready Jan 4 22:01:59 now510 kernel: IPv6: ADDRCONF(NETDEV_UP): enp15s0u2: link is not ready Jan 4 22:01:59 now510 NetworkManager[842]: <info> (enp15s0u2): device state change: unavailable -> disconnected (reason 'none') [20 30 0] Jan 4 22:01:59 now510 kernel: IPv6: ADDRCONF(NETDEV_UP): enp15s0u2: link is not ready
and the interface shows up in the list reported by ip:
[root@now510 ~]# ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> [...]
2: enp0s25: <BROADCAST,MULTICAST,UP,LOWER_UP> [...]
3: wlp3s0: <BROADCAST,MULTICAST> [...]
4: enp15s0u2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
link/ether ac:7f:3e:e5:40:39 brd ff:ff:ff:ff:ff:ff