Re: Set permanent route to IPv6 subnet on interface

[Andrei Borzenkov <arvidjaar gmail com>]

26.03.2020 11:15, Jeremy Ardley пишет:
> What is the best NetworkManager method to add a permanent route to an
> ipv6 subnet on an interface?
>
> I can add a temporary route outside of NetworkManager thus:
>
> ip -6 route add 2001:db8:c111:b000::/56 dev eth0

Many aspects of IPv6 implicitly expect /64 network prefix. If this is
what your router advertises, it likely explains why autoconfiguration
does not work in you case.

> Where should this be done in NetworkManager and what is the correct syntax?

Works for me if I define static route with :: (empty) gateway. :: is
shorthand for all zeroes. Where to define static route depends on used
frontend, but normally you should have IPv6 tab which also Routes button.

bor@tw:~> nmcli -g ipv6.routes con show Wired\ connection\ 2
fd01\:2345\:6789\:ab00\:\:/56 0
bor@tw:~> ip -6 r
::1 dev lo proto kernel metric 256 pref medium
fd01:2345:6789:ab00::/56 dev enp0s5 proto static metric 1024 pref medium
...


> (in this instance the interface eth0 also has an assigned ipv6 /128
> address in the subnet range)
>
>
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