11.09.2011 22:57, Michael D. Berger wrote: > On my CentOS 6 partition of my laptop: > > First note that for this test, NetworkManager is not > running because I did: > chkconfig --del NetworkManager > and then rebooted. > > Here is my ifcfg-eth0: > > DEVICE="eth0" > NM_CONTROLLED="no" > ONBOOT=no > HWADDR=xx:xx:xx:xx:xx:xx > TYPE=Ethernet > BOOTPROTO=none > IPADDR=192.168.2.5 > PREFIX=24 > GATEWAY=192.168.2.1 > DNS1=192.168.2.1 > DNS2=192.168.2.1 > DEFROUTE=yes > IPV4_FAILURE_FATAL=yes > IPV6INIT=no > NAME="System eth0" > UUID=xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx > > I reboot to level3, do startx (to KDE 4) then do: > # ifconfig eth0 up > # ping 192.168.9.1 > connect: Network is unreachable > > If I edit ifcfg-eth0 to set > ONBOOT=yes > and reboot, I get a proper connection. > > So why is "ifconfig eth0 up" not connecting? > > Thanks for your help. > Mike. > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos You should not use 'PREFIX=...' parameter if you prefer static network settings functionality provided by initscripts rather than NM daemon. I believe is is not honored by ifup* scripts and is not documented by el6 deployment guide either. Use 'NETMASK=...' instead and then issue the command 'ifup eth0' to bring your NIC up and running.