/127 between routers?

[Pekka Savola]

On Wed, 6 Jan 2010, Matsuzaki Yoshinobu wrote:
> A vendor said me the cost of special care for these unused address is
> too high - you need double lookup to prevent packet loops.  And they
> decided not to perform such double lookup.  So I prefer /127s on
> p-to-p links.  It's like an operational insurance to prevent packet
> loops.

There are no packet loops on interfaces that use address resolution, 
e.g. Ethernet.  This is a problem with SDH/SONET and similar p2p 
interfaces, however.  It would be clearer to everyone if the 
proponents of /127 would remember to say that when crying wolf (packet 
loops).

-- 
Pekka Savola                 "You each name yourselves king, yet the
Netcore Oy                    kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings