--On Wednesday, September 14, 2011 12:26:10 PM -0700 Edward Morbius <dredmorbius at 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