On 9 Feb 2011, at 09:48, sth...@nethelp.no wrote:
>> Is there a NANOG FAQ we can add this to? >> >>> 1- Use Public Ipv6 with /122 and do not advertise to Internet >>> 2- Use Public Ipv6 with /127 and do not advertise to Internet >> >> The all zeros address is the all routers anycast address so on most >> non-Cisco routers you can't use it, ruling out /127. The top 128 addresses >> in any subnet are also reserved anycast addresses although they don't do >> much in practice. So the longest prefix length you should use is /120 and >> only use addresses 1 - 127. > > A /127 mask is still the best way to handle real point-to-point links > like SDH/SONET today, to avoid the ping-pong problem. Works fine with > Cisco and Juniper, not tried with other vendors. > Can you elaborate on this? What's the ping-pong problem? Sam (who's experience is pretty much mostly ethernet)
