It seems, even though we are writing 2019 on the calendar, that IPv6 is still not fully supported.

I have recently tried the VCSA backup feature on a number of VCSAs and they all fail consequently at about 35%. When I look in the backup.log, I find an error like this:

BackupManager encountered an exception: While reading from '/etc/systemd/network/10-eth0.network' [line  7]: option 'gateway' in section 'Network' already exists

The 10-eth0.network file looks like this:

[Match]

Name=eth0

[Network]

Gateway=2001:****:248:64::100:1

Gateway=172.**.100.1

Address=2001:****:248:64::100:203/64

Address=172.**.100.203/23

IPv6AcceptRouterAdvertisements=false

DHCP=no

[DHCP]

UseDNS=false

Which is a perfectly legal dual-stack config file.

All our VCSAs are running 6.7U2 (6.7.0.30000)