[CentOS] IPV4 is nearly depleted, are you ready for IPV6?

Wed Dec 8 11:21:13 UTC 2010
Adam Tauno Williams <awilliam at whitemice.org>

On Tue, 2010-12-07 at 21:36 -0500, Ross Walker wrote: 
> >> I can only image phonetically calling these off on a support call, I'd
> >> get half way through it and the other end would tell me to "forget it
> >> I'll wait until DNS is working again".
> > You aren't crippled currently when DNS doesn't work?  Because e-mail,
> > Active Directory / Kerberos, and numerous other services just-don't-work
> > without functioning DNS anyway.  I'd say the network-minus-DNS is pretty
> > much irrelevant in the real world.
> Well, there is DNS down and there is DNS issues causing some sites
> problems. These may or may not be due to our DNS servers, you get the
> idea.
> When your on your router or switch, want to traceroute or find out
> what port an address is on... Is there even ARP with v6?

No, IPv6 uses the neighbor discovery protocol;  which is in many ways
superior to ARP.  
<http://en.wikipedia.org/wiki/Neighbor_Discovery_Protocol>

A lot of people will freak out - but once they get used to NDP instead
of ARP...