[c-nsp] Re: IPv6 subnets for point-to-point links

[Joel Snyder]

Although there is no longer any technical need for assigning IP 
addresses to a P2P link, we always do it (where possible) for management 
purposes.  Nowadays, more often than not, there is a NAT/NAPT function 
in the box at the other end of the P2P link and/or some sort of 
firewalling.  It's nice to have something known that the user does not 
consider "theirs" that we can ping, SNMP, etc.

The nice thing is that newer versions of most code let you use a /31 
instead of a /30, so you can get a big pile of P2P subnets out of your 
average /24.

DSL with PPP, of course, breaks that paradigm, but we're less interested 
in helping people manage their DSL links than we are with the T1 and 
T3-sized pipes.

Having addressing on the P2P side also seems to help with things like 
traceroutes; the numbers coming back are easier to assimilate and make 
"more sense" to operations guys.

jms
-- 
Joel M Snyder, 1404 East Lind Road, Tucson, AZ, 85719
Phone: +1 520 324 0494 (voice)  +1 520 324 0495 (FAX)
jms at Opus1.COM    http://www.opus1.com/jms    Opus One