> > Was asked today how to transition from an environment that is running > > IPv4 and IPv6 to only IPv6. At first glance, I would think that as long > > as all the applications support IPv6, it should be possibly to just > > restart (maybe reboot) with only IPv6 enabled. But am I missing something? > > > > If I "turn off" IPv4, will something fundamental break? > > There might be some applications which try to communicate with the > machine itself using IPv4 to either 'localhost' or uname -n. > Thus keeping uname -n and localhost in /etc/inet/hosts for 127.0.0.1 and > having lo0 with that address might be helpful.
Agreed. There are a lot of things that assume that IPv4 loopback works and do not check IPv6 loopback[1]. Unplumb IPv4 loopback at your peril. The rest of IPv4 should be able to be turned off with no issues. [1] Nor do I think they should. But I suppose that's a matter for debate. -- meem _______________________________________________ networking-discuss mailing list [email protected]
