--On Wednesday, September 14, 2011 12:26:10 PM -0700 Edward Morbius dredmorbius@gmail.com wrote:
I'm looking for a capability similar to Debian/Ubuntu's pre/post up/down network commands capability.
[...]
We should be able to solve this by pinging the router directly when bringing up the interface, rather than waiting (a day) for the router's ARP cache to expire.
Have a look at arping(8) and it's -U flag in particular rather than ping.
Also read 'man ifup'. That refers you to /usr/share/doc/initscripts*/sysconfig.txt which talks about the ifup-post script. Looking at the end of ifup-post, we see the following:
if [ -x /sbin/ifup-local ]; then /sbin/ifup-local ${DEVICE} fi
So it's probably the case that you could create a /sbin/ifup-local that, based on the device name, may arping the gateway.
I was looking at my RHEL6 laptop when I was writing this, but C6 is almost certainly the same.
Devin