Relay nodes are always protecting themselves by rate-limiting, aren't they? And isn't most media traffic relayed? I'm not seeing how the NAT64 scenario would *dramatically* increase Skype's global relay traffic. NAT64 would currently be a very small percentage of all Skype traffic. We can always find examples of where things will break with v6. While the v6-only world is still very small, let's *start* somewhere, where intelligent clients like Skype can always "fall back" to v4. Lots of time to figure out the corner cases. Frank -----Original Message----- From: Matthew Kaufman [mailto:matthew@matthew.at] Sent: Thursday, January 06, 2011 8:55 PM To: Owen DeLong Cc: Nanog Operators' Group Subject: Re: Problems with removing NAT from a network On 1/6/2011 5:48 PM, Owen DeLong wrote:
Doesn't all of this become moot if Skype just develops a dual-stack capable client and servers?
<snip> Skype can still make this work by relaying, but in order to protect the relay machine's bandwidth it will rate-limit the traffic, and so your A/V experience will suffer. And that's assuming there's enough dual-stacked relays... if there aren't, it won't be possible to find a relay that they can reach over IPv4 and you can reach over IPv6 that has available bandwidth. Matthew Kaufman