What distribution are you using?
Scientific Linux 7.8 (7.9 soon).
How do you configure the interfaces?
By adding the relevant lines to the ifcfg-vlanNNN files.
You can also use a sysctl config file in /etc/sysctl.d to set ...
Yes, we do all that, or at least that's what the init-scripts do. But as I said, there's a race condition. The interfaces are set so that they shouldn't auto-configure, but there's time between the interfaces appearing and them being configured not to auto-configure, and that's enough time for them to acquire SLAAC addresses, at least sometimes. As for why we want static addresses when we could just as easily use the SLAAC ones, mostly we do just use SLAAC addresses and have our DNS provisioning system generate the AAAA and PTR entries for them. But for these particular machines we definitely don't want to have a dependency on some other bit of kit to transmit the RAs. And we definitely don't want to have to try to debug routing issues a couple of weeks after some other change or breakage. -- George D M Ross MSc PhD CEng MBCS CITP University of Edinburgh, School of Informatics, Appleton Tower, 11 Crichton Street, Edinburgh, Scotland, EH8 9LE Mail: gdmr@inf.ed.ac.uk Voice: 0131 650 5147 PGP: 1024D/AD758CC5 B91E D430 1E0D 5883 EF6A 426C B676 5C2B AD75 8CC5 The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.