[BBLISA] anybody doing IPv6 for real operations?/possible presentation topic

[Benjamin Cline]

Edward Ned Harvey wrote:
>> How can a router that doesn't know anything about IPv6 make a
>> forwarding
>> decision for ("route") packets (datagrams) using an addressing system
>> it
>> knows nothing about? 
> 
> If you are on a network which does not do IPv6, and you need (or want) to do
> IPv6, you can get an address assigned to you from some provider and
> encapsulate the IPv6 packets in IPv4.  Much like doing a VPN tunnel to
> access your 10.x.x.x network at work from your 192.168.1.x network at home,
> except that your IPv6 address is world routable.
> 

Right. But none of the devices between the tunnel endpoints are 
_routing_ IPv6, they're routing IPv4 packets that just happen to have an 
IPv6 payload inside. All of the forwarding decisions are made on the 
IPv4 headers. For all the intermediate routers care these packets could 
be NFS, RDP, DNS, IPX in IP, Appletalk in IP, etc.

	Benji