Commodity Frame Relay or ATM with two DAFs entering the facility, but an inspection of the DLRs for the PVCs shows that they both traverse the same switch.
Two SONET connections that are groomed onto the same OC48.
We know that separacy of circuits is subject to change due to the widespread use of switches (DACS, ATM, Ethernet) and the widespread telecom practice of grooming customer circuits over time. It is hard work to ensure that true separacy exists when it is needed to meet customer contract conditions. Given this, I think it would be unwise to specify the degree of separacy in an ARIN policy. It would be almost impossible to enforce such a provision even if you restrict it to new applications. And even then, anyone can comply to get their ASN and PI block, then go back to the pair of IPv6 tunnels for the long haul. ARIN policy has always had to strike a balance. We are not lawmakers or law enforcers. --Michael Dillon