On Aug 14, 2012, at 1:16 AM, Eugene Grosbein wrote: > 11.08.2012 20:35, David Duchscher пишет: >> Greetings, >> >> I have a need to turn off the link of an ethernet port on a Intel nic. The >> issue is not a big deal but one we would like to solve. we have no way of >> signaling an upstream router that a path is down but via turning off the >> link of the ethernet port. This would only be used when something goes >> wrong. The hope is that we could automate some problems and handle other >> situations remotely avoiding having to visit the system in person. >> >> Any thoughts? We can modify the system so if it means modifying the driver >> or some other code, I am willing to try. Just need a little direction. >> >> Thanks for your time, > > I made such patch a couple of years ago and run it in production with > copper-based > em(4) and igb(4) NICs. The patch introduces new sysctls like > dev.em.X.down_disables_link > and dev.igb.X.down.disables_link with default zero values. > Setting sysctl dev.em.0.down_disables_link=1 makes "ifconfig em0 down" bring > link down. > > http://www.grosbein.net/freebsd/patches/em_sysctl-8.3.diff.gz > http://www.grosbein.net/freebsd/patches/igb_sysctl-8.3.diff.gz
This is exactly what we needed. Thanks for sharing this with us. -- DaveD
