Hello All.
I finally got my wireless going on my AMD box with CentOS 6.3 and I though I would share the steps I took to get it working. I made notes as I went along through trial and error and clean installs more than once, and I think these steps are pretty accurate as to what I did. Forgive me if I missed anything. Sometimes you get something to work and you forgot how you did it :lol

I am a newb and I don't even understand all this stuff but I hope this helps someone. Please let me know what you think

Anyway here we go: All commands done as su in terminal

To Setup Wireless You will need

A detected wireless device
dhcp and wireless-tools installed
The ifcfg-wlan0 OR ifcfg-ra0 file described below

once on one of my attempts my wireless was named wlan0 by the system and once it was named ra0 by the system, don't know why.

================================================== ==
You can start by using different commands to gather information
================================================== ==


== BEGIN cat /etc/redhat-release ==
CentOS release 6.3 (Final)
== END cat /etc/redhat-release ==

listing all ethernet devices detected by the kernel:


== BEGIN lspci|grep -i eth
05:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06)
== END lspci|grep -i eth

Then, to see if you have any wireless devices that have already had their kernel drivers loaded:

== BEGIN iwconfig

lo no wireless extensions.

eth0 no wireless extensions.

== END iwconfig


== BEGIN for BUSID in $(/sbin/lspci | awk '{ IGNORECASE=1 } /net/ { print $1 }'); do /sbin/lspci -s $BUSID -m; /sbin/lspci -s $BUSID -n; done

05:00.0 "Ethernet controller" "Realtek Semiconductor Co., Ltd." "RTL8111/8168B PCI Express Gigabit Ethernet controller" -r06 "ASRock Incorporation" "Motherboard (one of many)"
05:00.0 0200: 10ec:8168 (rev 06)
07:05.0 "Network controller" "Ralink corp." "RT2800 802.11n PCI" "Linksys" "Device 0067"
07:05.0 0280: 1814:0601

== END for BUSID in $(/sbin/lspci | awk '{ IGNORECASE=1 } /net/ { print
$1 }'); do /sbin/lspci -s $BUSID -m; /sbin/lspci -s $BUSID -n; done

== BEGIN lspci -nn | grep Network
07:05.0 Network controller [0280]: Ralink corp. RT2800 802.11n PCI [1814:0601]
== END lspci -nn | grep Network

================================================== =========================

Get dependencies
== BEGIN yum -y install dhcp wireless-tools

Check your network
== BEGIN ifconfig -a


#If wlan0 or ra0 is not showing then there is a problem with your drivers and you cannot proceed.

#How I got my drivers

goto elrepo.org link
Index of /linux/elrepo/el6/x86_64/RPMS

click on these drivers below and install with package mgr
then reboot

NOTE: My wireless is Ralink corp. RT2800 802.11n PCI

Driver works with RT2800 802.11n PCI [1814:0601]

http://elrepo.org/linux/elrepo/el6/x...epo.x86_64.rpm

Firmware
http://elrepo.org/linux/elrepo/el6/x...epo.x86_64.rpm
================================================== ===========================




[root@CentOS6 John]# iwconfig
lo no wireless extensions.

eth0 no wireless extensions.

ra0 Ralink STA ESSID:"" Nickname:"RT2860STA"
Mode:Auto Frequency=2.412 GHz Access Point: Not-Associated
Bit Rate:1 Mb/s
RTS thr:off Fragment thr:off
Encryption key:off
Link Quality=10/100 Signal level:0 dBm Noise level:0 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0




#FILES
ifcfg-ra0
/etc/sysconfig/network-scripts directory


We will write a configuration file called ifcfg-ra0 (or the name it is detected as, remember, we're doing this manually) in /etc/sysconfig/network-scripts/

# this works for my wireless
HWADDR=XXXXXXXXXXX
MACADDR=XXXXXXXXXX
ESSID="XXXXXXXX"
MODE=Managed
KEY_MGMT=WPA-PSK
TYPE=Wireless
BOOTPROTO=dhcp
DEFROUTE=yes
PEERDNS=yes
PEERROUTES=yes
IPV4_FAILURE_FATAL=yes
IPV6INIT=no
NAME="Auto Secure_10" # I named this ra0 didnt matter still works
UUID=e1c015bb-50a2-48b6-8e49-f6917db6933c
ONBOOT=yes

# WORKING WIRELESS I disconnected my hardwire ETH0

== BEGIN nmcli dev
DEVICE TYPE STATE
eth0 802-3-ethernet unavailable
ra0 802-11-wireless connected
== END nmcli dev

Any feed back is welcome