On Mon, Jul 24, 2017 at 12:46 PM, David Farmer <[email protected]> wrote:
> In practice Neighbor Discovery, and other critical protocols, need > link-local addresses to talk to other link-local addresses and some > multicast addresses. > > Also, in theory a link-local address could talk to a GUA or ULA address on > the same link. However, in practices does this really happen? If it does > happen in practice what are circumstances? > > Thanks > > -- > =============================================== > David Farmer Email:[email protected] > Networking & Telecommunication Services > Office of Information Technology > University of Minnesota > 2218 University Ave SE Phone: 612-626-0815 <(612)%20626-0815> > Minneapolis, MN 55414-3029 Cell: 612-812-9952 <(612)%20812-9952> > =============================================== > Not quite 100% related, but I had an upstream provider put an artisanal handcrafted IPv6 BCP38 ACL that didn't allow link-locals to talk to the multicast range (or to the GUA on-link address possibly) on a port, and it caused problems after a reboot I believe only. Things were able to keep working for quite a while if I recall. Theodore Baschak - AS395089 - Hextet Systems https://bgp.guru/ - https://hextet.net/ http://mbix.ca/ - http://mbnog.ca/
