[systemd-devel] systemd-networkd router advertisement handling

[Lennart Poettering]

On Fr, 14.08.20 13:56, Marc Lasch (mlasch at mailbox.org) wrote:

> Hello,
>
> I recently stumbled across the following section in the systemd-networkd
> documentation for IPv6AcceptRA=:
>
> "Note that kernel's implementation of the IPv6 RA protocol is always
> disabled, regardless of this setting. [...]"
>
> What does this mean in practice? Is the kernel's IPv6 RA implementation
> disabled (by setting accept_ra=0?) when systemd-networkd is started?

networkd turns it off for the ifaces it manages.

> Does it affect all network interfaces or just the ones managed
> (configured) by systemd-networkd?

Only the latter.

> When I run other services in parallel like dhcpcd, how does networkd
> affect them? When dhcpcd binds to dhcpv6 client port 546,
> systemd-networkd fails to bind in case of a O-flag in the RA, but are
> they also interfering with received RAs?

we bind per interface, there should not be a conflict.

Lennart

--
Lennart Poettering, Berlin