Workaround for problems with RA (was: Re: Unwanted RA on LAN)

[Leen Besselink]

Hi folks,

Sorry for hijacking this thread.

I haven't given this a lot of thought and checked the protocols or
operating system support so sorry if it is a stupid comment.

Is it possible to workaround these problems with DHCP on IPv4 by adding
2 routes like: 128.0.0.0/1 and 0.0.0.0/1
And send 2 routes like 0::0/1 and 8000::0/1 along with RA or DHCPv6 ?

Wouldn't that mean you have the more specific prefix when someone
announces 0.0.0.0/0 or 0::0/0 by accident ?

I don't know if these protocols allow this or which operating systems
support this but couldn't this workaround help prevent disruption ?

I did see an option static-routes in dhcp-options (5) and list of
prefixes in radvd.conf (5)

Someone probably already tried this with IPv4 I'm sure.

Have a nice day,
    Leen.