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Linux - Networking This forum is for any issue related to networks or networking.
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Old 11-07-2014, 04:54 PM   #1
deadheadblues
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Registered: Feb 2014
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shutting down an interface when another interface goes down


Hi. I want to be able to shutdown eth2 if eth1 were to lose its network connectivity. This could be due to a shutting down of the upstream switch or unplugged cable or something else.

Is it possible to do this? What are some options?

Thanks,
 
Old 11-07-2014, 07:56 PM   #2
Ser Olmy
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If the loss of connectivity generates an event of some kind, you could probably create a udev rule to tie that event to any action you like.
 
Old 11-17-2014, 05:48 PM   #3
sdblanchet
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The question is
How fast do you need to shutdown the other interface ?

A command like this in a script from a cron job go do it but you must not be in a hurry
RES=`ping -c 1 your_running_interface | grep '1 received' | awk '{print $4" "$5}'`
if [ "x$RES" == "x" ]; then
ifdown you_interface_to_shutdown
fi

I would be careful about the consequences from shutting down the other interface.
 
  


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