I'm trying to use a wireless USB key on a RHEL7 NUC. The adapter shows up in 'ifconfig':

eno1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet  netmask  broadcast
        inet6 fe80::baae:edff:fe7d:ce5a  prefixlen 64  scopeid 0x20<link>
        ether b8:ae:ed:7d:ce:5a  txqueuelen 1000  (Ethernet)

enp0s20f0u3: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet6 fe80::214:d1ff:fed8:cc0f  prefixlen 64  scopeid 0x20<link>
        ether 00:14:d1:d8:cc:0f  txqueuelen 1000  (Ethernet)

but there is no wireless configuration options available in NetworkManager, so I'm not able to select an SSID/wpa2-password and so forth.

I found a thread that discussed a similar issue for centos. Following advice there, it appeared that I did not have the kernel module loaded for the wireless adapter:

# lspci -nn | grep -i net

00:1f.6 Ethernet controller [0200]: Intel Corporation Ethernet Connection I219-V [8086:1570] (rev 21)
01:00.0 Network controller [0280]: Intel Corporation Wireless 8260 [8086:24f3] (rev 3a)

# grep -i 8086 /lib/modules/*/modules.alias | grep -i 24f3 | tee -a q
alias pci:v00008086d000024F3sv*sd00000010bc*sc*i* iwlwifi

# grep -i 8086 /lib/modules/*/modules.alias | grep -i 1570
alias pci:v00008086d00001570sv*sd*bc*sc*i* e1000e

# lsmod | grep wifi

# modprobe iwlwifi
# lsmod | grep wifi
iwlwifi               112501  0 
cfg80211              514740  1 iwlwifi

However after following the advice in that thread for restarting the NetworkManager:

# service network stop
# service wpa_supplicant stop
# chkconfig --level 12345 network off
# chkconfig --level 12345 wpa_supplicant off
# chkconfig --level 2345 NetworkManager on
# service NetworkManager restart

there are no still no wireless configuration options showing in NetworkManager. I do have the NetworkManager-wifi package installed:

# rpm -qa | grep NetworkM

What else do I need to do to make the wifi adapter available to NetworkManager. Or, perhaps simpler, how can I configure the wireless adapter on the command line?

  • Why does your server need wireless connectivity? – EEAA Apr 24 '16 at 3:01
  • It's temporary. I need to fish some wires into the room it will live. – Peeter Joot Apr 24 '16 at 3:18

It turns out that a newer than 3.10 kernel as well as updated firmware was required.

  • If you were able to get it working with a newer kernel, you should open a case with Red Hat so that they can fix the problem. – Michael Hampton Apr 26 '16 at 20:47

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