AH. I didn't think of that!

Can I suggest, then, that you do a

chkconfig wpa_supplicant on

so it starts automatically on boot up?

Hi Nick Howitt , driver was already loaded, but the problem was not assigning IP Address for Wireless interface, That solved using below method !!

after connecting with

#service wpa_supplicant start

executed

dhclient wlp0s20u1

, this solved the issue and interface got ip address.

Thank you once again Mr. Nick Howitt for your valid assistance.

I'm wondering if the USB driver has loaded at all. Can you look at your boot log or dmesg log if you hot-plugged the USB NIC to identify it? Or just run the command "dmesg". You can also use the lsusb command but you'll have to google its use. I suspect you're manually configuring ifcfg-wlp0s20u1 and network.conf because there is no network driver.

BTW I have no idea how to configure wpa_supplicant. It is just something I've bumped into over time.

Need further help to go further, While checking wpa_supplicant log , it shows ' Association request to the driver failed' , detailed steps given here , may be useful for someone referring in future ..

Started implementing 'wpa_supplicant' As a first step installed using below command

yum install wpa_supplicant

Added wlp0s20u1 to EXTIF

[root@gateway wpa_supplicant]# cat /etc/clearos/network.conf

# Network mode

MODE="gateway"



# Network interface roles

EXTIF="enp2s0 enp3s0 wlp0s20u1"

LANIF="enp4s0"

DMZIF=""

HOTIF=""



# Domain and Internet Hostname

DEFAULT_DOMAIN="qf2.com"

INTERNET_HOSTNAME="gateway.qf2.com"



# Extra LANS

EXTRALANS=""



# ISP Maximum Speeds

ENP2S0_MAX_DOWNSTREAM=10430

ENP2S0_MAX_UPSTREAM=13810

ENP3S0_MAX_DOWNSTREAM=7780

ENP3S0_MAX_UPSTREAM=12330

[root@gateway wpa_supplicant]#

Created network Script File.

[root@gateway wpa_supplicant]# cat /etc/sysconfig/network-scripts/ifcfg-wlp0s20u1

DEVICE=wlp0s20u1

TYPE="Wireless"

ONBOOT="yes"

USERCTL="no"

BOOTPROTO="static"

IPADDR="192.168.1.2"

NETMASK="255.255.255.0"

GATEWAY="192.168.1.1"

[root@gateway wpa_supplicant]#

Modified file '/etc/sysconfig/wpa_supplicant' modified only one line 'INTERFACES="-iwlp0s20u1"'

[root@gateway wpa_supplicant]# cat /etc/sysconfig/wpa_supplicant

# Use the flag "-i" before each of your interfaces, like so:

#  INTERFACES="-ieth1 -iwlan0"

INTERFACES="-iwlp0s20u1"



# Use the flag "-D" before each driver, like so:

#  DRIVERS="-Dwext"

DRIVERS=""



# Other arguments

#   -u   Enable the D-Bus interface (required for use with NetworkManager)

#   -f   Log to /var/log/wpa_supplicant.log

#   -P   Write pid file to /var/run/wpa_supplicant.pid

#        required to return proper codes by init scripts (e.g. double "start" action)

#        -B to daemonize that has to be used together with -P is already in wpa_supplicant.init.d

OTHER_ARGS="-P /var/run/wpa_supplicant.pid"



[root@gateway wpa_supplicant]#

Added WiFi Network Details in file and started wpa_supplicant

[root@gateway wpa_supplicant]# cat /etc/wpa_supplicant/wpa_supplicant.conf

network={

        ssid="HUAWEI"

        scan_ssid=1

        key_mgmt=WPA-PSK

        psk="5555831"

}

[root@gateway wpa_supplicant]# # service wpa_supplicant start

status of service is shown as below

[root@gateway wpa_supplicant]# service wpa_supplicant status

Redirecting to /bin/systemctl status  wpa_supplicant.service

● wpa_supplicant.service - WPA Supplicant daemon

   Loaded: loaded (/usr/lib/systemd/system/wpa_supplicant.service; disabled; vendor preset: disabled)

   Active: active (running) since Tue 2017-03-14 11:36:02 AST; 33min ago

 Main PID: 16652 (wpa_supplicant)

   CGroup: /system.slice/wpa_supplicant.service

           └─16652 /usr/sbin/wpa_supplicant -u -f /var/log/wpa_supplicant.log -c /etc/wpa_supplicant/wpa_supplicant.conf -iwlp0s20u1 -P /var/run/wpa_supplicant.pid



Mar 14 11:36:02 gateway.qf2.com systemd[1]: Starting WPA Supplicant daemon...

Mar 14 11:36:02 gateway.qf2.com systemd[1]: Started WPA Supplicant daemon.

Mar 14 11:36:09 gateway.qf2.com wpa_supplicant[16652]: ioctl[SIOCSIWFREQ]: Device or resource busy

Mar 14 11:55:55 gateway.qf2.com wpa_supplicant[16652]: ioctl[SIOCSIWFREQ]: Device or resource busy

Mar 14 11:58:59 gateway.qf2.com wpa_supplicant[16652]: ioctl[SIOCSIWFREQ]: Device or resource busy

[root@gateway wpa_supplicant]#

Log file is

Successfully initialized wpa_supplicant

wlp0s20u1: Trying to associate with 90:4e:2b:51:39:47 (SSID='HUAWEI-PD' freq=2437 MHz)

wlp0s20u1: Association request to the driver failed

wlp0s20u1: Associated with 90:4e:2b:51:39:47

wlp0s20u1: WPA: Key negotiation completed with 90:4e:2b:51:39:47 [PTK=CCMP GTK=TKIP]

wlp0s20u1: CTRL-EVENT-CONNECTED - Connection to 90:4e:2b:51:39:47 completed [id=0 id_str=]

Hi Friend,

Thank you for your response!!

1) I will try with 'wpa_supplicant' & update the results here.
2) Regarding updating drivers , I am interested, will do that too in near future.