/127 is actually what IETF recommends in RFC6164 ( http://tools.ietf.org/html/rfc6164) /126 is not officially supported in this RFC.
I have used /127 on "real" P2P links as well as Ethernet links connecting 2 routers. Arie On Sat, Jun 1, 2013 at 2:30 PM, <[email protected]> wrote: > > > I do /127 p2p > > > > > > Subnet anycast is not a supported feature or requirment in my network. > > > > As subnet anycast is a integral part of IPv6, you might not want to > > support or require it, but the gear will implement it and thus one point > > it will bite you as suddenly it won't work. > > > > Likely though you are just putting the PtP links as 2x /128 and not as a > > /127 on the link. The former works, the latter breaks. > > Funny, /127 works great for "real" point to point links (SDH). I tried > it just now on an Ethernet link between a JunOS 11.4 box and an IOS XR > 4.2.3 box in my lab - and it seems to work just great there too. > > What is the real usage of IPv6 subnet anycast? > > Steinar Haug, AS 2116 > >
