MatsK wrote:
Les Mikesell wrote:
I have a number of machines that have 4 NICs, two of which are actually in
use, running Centos 5. When they are rebooted, they seem to change the
eth interface names, assigning them in different orders. I'm a little
fuzzy on the details because they are at a remote location and I can't
access them easily - especially after the network breaks. Shouldn't:
alias eth0 bnx2
alias eth1 bnx2
alias eth2 e1000
alias eth3 e1000
in /etc/modprobe.conf always make the intel cards eth2 and 3?
Noop, this is done with ifcfg-ethX where X is the if number.
Create a /etc/sysconfig/network/ifcfg-eth0 that look like this example:
DEVICE=eth0
HWADDR=00:01:23:45:67:89
ONBOOT=yes
TYPE=Ethernet
NETMASK=255.255.255.0
IPADDR=192.168.1.154
GATEWAY=192.168.1.1
and then create ifcfg-eth1, ifcfg-eth2, ifcfg-eth3
then do a "service network restart" to activate the settings.
I do have the ifcfg-ethX files for the 2 interfaces that are currently
active, but since the machines were built by image copies of a master disk,
they do not have HWADDR address entries. A person on-site with access to the
console adjusted them if they didn't come up right the first time, but they
seem to shift around on each reboot. Will adding the HWADDR entry nail them
down even if it doesn't match the nic type specified in modprobe.conf? Can
someone point me to the code where this happens? Until recently the machines
were running centos 3.x and this seems to be a difference in behavior.
In my experience, adding the HWADDR line to your ifcfg-ethX files will tie
the network interface to the right card, regardless of modprobe.conf
entries. I usually remove HWADDR lines when anaconda provides them at
install time because if I replace a nic (which obviously has a different
MAC address) without updating the HWADDR line, the interface fails to
start. In cases where modprobe.conf is unable to order the interfaces as
I want it to, I add HWADDR lines. Works every time.
Hope this helps.
Barry
_______________________________________________
CentOS mailing list
CentOS@xxxxxxxxxx
http://lists.centos.org/mailman/listinfo/centos
