[CentOS] Run commands automatically when bringing up/down network interfaces?

Wed Sep 14 21:24:03 UTC 2011
Edward Morbius <dredmorbius at gmail.com>

OK.

The next question becomes: how do we ensure that this happens for each
defined IP, and that the ping is issued from a given IP address (routing/
etc.).

What we're hoping to accomplish is for the colo switch to get the correct
ARP address for each defined IP address on the host.  In some cases, we'll
have multiple NICs on the same subnet, in others, IP aliases on the same
NIC.

On Wed, Sep 14, 2011 at 2:14 PM, Warren Young <warren at etr-usa.com> wrote:

> On 9/14/2011 1:26 PM, Edward Morbius wrote:
> > I'm looking for a capability similar to Debian/Ubuntu's pre/post up/down
> > network commands capability.
>
> If you look in /etc/sysconfig/network-scripts/ifup, you'll see that it
> will call /sbin/ifup-pre-local if it exists, before bringing up the
> network interface.
>
> That script also calls .../network-scripts/ifup-post after bringing up
> the network interface, which in turn will call /sbin/ifup-local, if it
> exists, as its last step.
>
> Neither is interface-specific, but they get the interface name passed to
> them, so if you needed to do something different for different
> interfaces, you could.
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-- 
Dr. Ed Morbius
Chief Scientist / Philologist / Robot Wrangler / Powerplant Operator
Krell Power Systems Unlimited
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