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CentOS 5.5 installation guide (part 2) (test)
X. Network
Network setup generally comes down to two choices: wired or wireless and with or without NetworkManager. Choices rather trivial when using a desktop/laptop PC with cable/wired connection (network should work “out of the box” with most hardware), but not so easy with wireless connections. At first we should take in to notice, that CentOS 5.5 kernel is a little bit out of date, thus it may not contain the firmware necessary for some wireless modules. Next thing is whether to use NetworkManager, a simple network management tool, or not.
Network Manager
http://wiki.centos.org/HowTos/Laptops/NetworkManager
http://fedoraproject.org/wiki/Tools/NetworkManager
- using NetworkManager is a simple, although not necessary, way to manage network connections (including wireless)
- first add /sbin to PATH
- to enable NetworkManager at boot
# chkconfig NetworkManager on
- to start NetworkManager
# service NetworkManager start
- if You decide to use wpa_supplicant to enable wireless, remove NetworkManager from startup demons
# chkconfig NetworkManager off
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Wireless support (NetworkManager)
http://linuxwireless.org/en/users/Drivers/
http://www.redhat.com/magazine/003jan05/features/networkmanager/
http://wiki.centos.org/HowTos/Laptops/Wireless
- after enabling NetworkManager You may also need to reload (or install) firmware for wireless adapter/card
- since CentOS kernel is not the latest and greatest, firmware it contains (also the one provided by officially supported repositories) may be old and some devices may not even be supported (not all vendors “open” their code for free redistribution)
- to install the newest firmware we have to enable ELRepo
# yum –enable=elrepo install iwl3945-firmware
then just reload the module
# modprobe -r iwl3945; modprobe iwl3945
and enable NetworkManager (You may have to reboot)
# service NetworkManager start
- procedure described above is dedicated for intel pro wireless 3945 devices but the pattern used (first instal/reload the module, then enable NetworkManager) generaly applies to all devices
