At 07:44 AM 5/11/2015, you wrote: >On 11-05-2015 00:57, david wrote: >>I have a question about the network and Centos 7 >> >>I am experimenting with two C7 installations: >>- On relatively new hardware, configured with fixed IP address in IPV4 only >>- on top of Windows, using VMWare, sharing my windows connection via >>Vmware's bridge with IPV4 only. >> >>On both configurations, I run a script every five minutes to test the >>network. The sequence is as follows: >>- Find the default interface using "ip route" >>- Find that interface's IP address by scanning the output of "ip route" >>for a match in interface. >> >>If the above tests fail to resolve, I issue "systemctl restart network", >>and post a mail message to myself. When this happens, the network does >>indeed come back correctly. > >If you are using fixed IP addresses, how is this check supposed to >detect network failures? Actually I'm surprised that it's failing >sometimes, as it should be pretty static. > >If that test is really that way, I would recommend saving those >outputs for post analysis because the shouldn't be changing like >that. Like, instead of ip route | grep, save it to a file using a >known timestamp, grep on it and leave it there/mail it to you if it fails. > > Marcelo Marcelo et al Of course, now that I stare at my environment, have 'avahi' and 'network manager' turned off, the failure does not show up. So, I withdraw the problem. David