[wellylug] ifup -a at boot up not bringing up all interfaces
Jo Booth
thegeek at mangee.net.nz
Thu Apr 12 05:38:42 NZST 2007
On 11/04/2007, at 22:24 , Sigurd Magnusson wrote:
> The server running www.silverstripe.com had to be rebooted today
> and to
> my annoyance at bootup it didn't bring up all the network
> interfaces. It
> only brought up eth0 and lo, but there are around 10 others,
...
> When I noticed this, I just ran "ifup -a" and everything came to life.
>
> Any ideas on why this didn't happen in the first instance.
In one of the config files i'd imagine theres an ONBOOT flag that is
either not there or is no for the interfaces added after it was created.
The script I looked at on one of my boxen, grabs a list of interfaces
with a ls /etc/sysconfig/network-scripts/ifcfg* - each of which
contains config for that interface, including an ONBOOT flag - if the
flag is =no, then it won't start it.
eg - check:
toot at OnyxL # vi /etc/sysconfig/network-scripts/ifcfg-eth0
...
ONBOOT=yes
..
If in your system log the interfaces were asked to come up and didn't
thats another story, but the ifup -a could mean a missing flag or
similar - often config changes are made while server is running, and
not saved permanently.
-Jo.
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