Hi. On Fri, Nov 23, 2018 at 03:39:16PM +0000, Steve Kemp wrote: > > with this: > > > > iface eth0 inet6 static > > address 2a03:9800:10:54::2 > > netmask 65 > > gateway 2a03:9800:10:54::1 > > > > Leave all the other entries intact. > > Then invoke this as root (one-time only): > > > > ip a d dev eth0 2a03:9800:10:54::2/64 > > ip a a dev eth0 2a03:9800:10:54::2/65 > > ip ro d default via 2a03:9800:10:54::1 > > This will need to be repeated at every reboot,
No, it won't. OP has two stanzas regarding eth0 in e/n/i already - one for inet and another one for inet6. The whole point of this exercise is to get persistent configuration for /65 netmask *and* to avoid ifdown/ifup sequence to implement it now. And, of course, do the thing without the reboot. Reco