Transition From IPv4 To IPv6
Not all routers can be upgraded simultaneous
- no “flag days”
- How will the network operatewith mixed IPv4 and IPv6 routers?
Two proposed approaches:
- Dual Stack: some routers with dual stack (v6, v4) can “translate” between formats
- Tunneling: IPv6 carried as payload n IPv4 datagram among IPv4 routers