Transcript Accessing IPv6 services through IPv4 Networks

v4/v6 transition and mobility
• Problem:
• NEMO MR finds itself on an IPv4 access network
• Needs to access IPv6 services through its Home Agent
• Tunneling mechanisms like Teredo/ISATAP can be used
• But… there are issues
• You end up with a NEMO tunnel through a transition tunnel
• Transition tunnel is between the MR and the transition router
• NEMO tunnel is between the MR and the HA
• If the MR moves and MR’s IPv4 access address changes,
transition tunnel breaks
• Do we need a mobility mechanism for the transition tunnel?
• End with two levels of mobility
– Mobility for transition tunnel
– Mobility for NEMO tunnel
NEMO solution
• Home Agent and transition router in the same box
• Home Agent supports v4 and v6
• Both MR and HA support IPv4 and IPv6
• MR binds an IPv4 CoA with its IPv6 HoA
• The outer IP header would be IPv4
– MR’s IPv4 CoA and HA’s IPv4 address
• The inner IP header would be IPv6
– MR’s IPv6 HoA and HA’s IPv6 address
• Optional ESP protection
• Firewall for the home link lets traffic to HA through
• No HA detection (HA is already known)
• Mobility already available