CRS305 sending router advertisement when it shouldn't?

RouterOS General
1

I noticed that I had incorrectly set

/ipv6 nd
set [ find default=yes ] advertise-dns=yes

in a CRS305. I would not expect it to have an impact, since it was not configured as a router

/ipv6 settings
set forward=no

and ADVERTISE shows as no on all ipv6 addresses.

But on the network I would get RA from it, which would effectively disable ipv6 on any host receiving it. Setting advertise-dns to no fixed the problem. I think this started with 7.23.

2

advertise-dns=yeswas not your fault, it's caused by a default configuration migration.

3

If you don't want the CRS305 to announce itself as a router, you need to edit the /ipv6 nd entry and set ra-lifetime=none. Edit the entry associated with the interface, or the default one with the all interface if you only have that.

4

just setting adversite-dns to no did the trick. I still find surprising to get RA when no address has ADVERTISE set.