Draft-chown-v6ops-vlan-usage-01 Tim Chown v6ops WG, IETF 60, San Diego, August 2, 2004.

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draft-chown-v6ops-vlan-usage-01 Tim Chown v6ops WG, IETF 60, San Diego, August 2, 2004

Scenario Enterprise site –Has no IPv6 support in L2/L3 switch-router equipment IEEE 802.1Q VLAN tagging support available External IPv6 connectivity present (not essential) –Delivered to IPv6-capable (maybe PC) router at site (PC) router supports VLAN tagging on interfaces (e.g. BSD), ideally multiple tags per interface –Can write any VLAN tag to internal facing traffic

Deployment Connect IPv6 (PC) router interface(s) to existing IPv4 L2/L3 switch-router equipment –Injects IPv6 RAs into existing IPv4 subnet VLANs –IPv6 thus enabled dual-stack on the wire Typically inject one IPv6 RA prefix per IPv4 subnet –Leads to IPv6 links congruent with IPv4 subnets IPv4 subnet/IPv6 links remain reconfigurable via software VLAN control

Advantages Easy to deploy IPv6 if VLAN support present Flexibility in provision thanks to VLAN tagging Flexibility in limiting where IPv6 access is offered Allows site to use real IPv6 addressing Often collapse multiple VLANs to single interface Can scale up provision with more interfaces No IPv4 host or router configuration changes Multicast (PIM-SM/SSM) friendly Easy migration when IPv6 equipment available

Discussion? Is this worth documenting? –It’s kind of obvious, but very useful –It is cited in our campus-transition draft If so, is it complete enough? –More examples might be useful (Pekka) If so, is it ready for WG adoption?