NANOG Operational Audit of IPv4+ End-to-End L3 Transport in North America 1. To deploy and operate a network there may be network elements (aka NATs) that are used by network operators to upgrade versions & to help with audits. 2. L3 "End-to-End" is only part of the story. What about Hop Count ? Lag Latency...band-width 3. In North America the Customer DeMarc is commonly to a Linux-based CPE Router (WRT-54GL is one example) 4. For FCC purposes and other audits, the DeMarc for L3 IPv4+ has to be consistent to avoid comparing apples and oranges. 5. It may be that large parts of the IPv4+ Spectrum allocated to North America no longer qualifies as part of the L3 End-to-End Transport (and never did?). http://www.iana.org/assignments/ipv4-address-space/ipv4-address-space.xml 6. Before ISPs run off chasing the IPv6 Brokers-duJour, it may be prudent to first make sure their IPv4+ networks still are part of the L3 End-to-End Transport. NANOG Operational Audit of IPv4+ End-to-End L3 Transport in North America