Transition mechanisms for unmanaged scope networks Christian - PowerPoint PPT Presentation

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Transition mechanisms for unmanaged scope networks Christian Huitema huitema@microsoft.com July 17, 2002 How come IPv6 is not there yet? networks networks Applications Need upfront investment, stacks, etc. Similar to Y2K, 32 bit

Transition mechanisms for unmanaged scope networks Christian Huitema huitema@microsoft.com July 17, 2002
How come IPv6 is not there yet? networks networks Applications � Need upfront investment, stacks, etc. � Similar to Y2K, 32 bit vs. “clean address type” Network � Need to ramp-up investment � No “push-button” applications applications transition 7/17/2002 IETF 54 - NGTRANS 2
Restated: how do we get IPv6 deployed? We need a flagship application � If possible, something IPv4 cannot do � For example, it relies on global addresses We need to convince developers � Don’t try to do NAT traversal, we will do it for you… And for that we need IPv6 everywhere � Or at least in all unmanaged networks 7/17/2002 IETF 54 - NGTRANS 3
What will be the flagship application? Local applications (file & print sharing) � Work OK in current home networks � Moderate IPv6 advantage (local addresses) Client applications (web & mail) � Work just fine today Peer to peer applications � Require connectivity, global addresses � First priority Server applications � Require connectivity, publishing in the DNS � Second priority 7/17/2002 IETF 54 - NGTRANS 4
Example of “hybrid” P2P, using SIP SIP signaling Proxy Proxy “nailed” TCP/IPv4 connections End-to-end transmission of NAT NAT voice, video, files… Host Host 7/17/2002 IETF 54 - NGTRANS 5
Getting IPv6 connectivity for P2P Step 1: host based, Teredo (with fix) � Deploy IPv6 “despite the NAT” � Engineer Teredo for direct transmission � Don’t want to proxy voice, video… Step 2: improved NAT with 6to4 � NAT also becomes an IPv6 router � May be “phase 1” if host has global IPv4 Step 3: improved ISP, dual stack � NAT receives prefix from ISP, relay it � Example: RA proxy Single stack IPv6 appears “much later” � IPv6 based P2P applications still work. 7/17/2002 IETF 54 - NGTRANS 6
Beside Connectivity… Security Make the router a “site boundary” � Ensures isolation of “local” applications Use privacy addresses � Provide NAT-equivalent privacy � Make the inside addresses “hard to guess” Use “personal firewall” � Don’t seat naked on the Internet 7/17/2002 IETF 54 - NGTRANS 7
And then, naming. For the “client” applications � Need to discover a “resolver” � Need a “reverse lookup” option � Wildcard PTR records ? � Automatic generation of PTR & AAAA ? � Some solution for 6to4 addresses ? For the “server” applications � Need to publish the address � Requires stable address, or dynamic updates 7/17/2002 IETF 54 - NGTRANS 8

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