Allow router advertisements on a nic without getting SLAAC address

[athan]

Is it possible to enable getting router advertisements on a network interface but disable SLAAC autoconf-ed address?

RA is necessary for stateful DHCPv6 and prefix delegation but "accept_rtadv" also gives a SLAAC address which I really don't need.

Any idea?

 

[VladiBG]

ifconfig(8)
-accept_rtadv
Clear a flag accept_rtadv.

/etc/rc.conf example:
ifconfig_re0_ipv6="inet6 -accept_rtadv"

 

[athan]

The "-accept_rtadv" flag cannot be used as it disables router advertisements that are necessary for stateful DHCPv6 to work.

 

[VladiBG]

In the man page the next section describe how to disable the auto configuration just below -accept_rtadv

Also you may check this post:
https://forums.freebsd.org/threads/ipv6-gateway.53522/post-301886

 

[athan]

Do you mean the -autoconf flag?
I'm afraid it doesn't work that way. It still gets a slaac address...

According to this post 11.2 revision "autoconf" is an address
property, not something you can set for an interface.

What I'm really looking for is something like linux net.ipv6.conf.<IF>.autoconf sysctl setting that leaves RA enabled but disables auto-configuring eui64 addresses.