Re: ping-pong phenomenon with p2p links & /127 prefixes

[Jeroen Massar <jeroen@unfix.org>]

On 2010-08-16 10:08, Fernando Gont wrote:
[..]
> P.S.: This fix doesn't prevent the use of /127s (it's orthogonal),

Unless you configure two /128's pointing to the remote side, which will
then thus not be 'on-link for neighbor discovery, the little thing
called the subnet anycast address will make sure that a /127 ptp simply
does not work, unless you have a platform which disables the subnet
anycast address of course.

Greets,
 Jeroen

... who is still wondering why people try to bother with anything not
/64, and how many links they need in their networks. If you are going to
size them a /127, even out of a /64 then you can do 2^63 =
9.223.372.036.854.775.808 /127's which is a bit insane and you will
never need that either as it won't ever fit in any routing table ;)