Hi Anna, On 22/09/17 15:05, Anna Wilson wrote:
- that new entrants are most likely to support IPv6 (because very little IPv4 can be got); - that even fully IPv6-ed new entrants need some IPv4 to make IPv6 work; - reaching IPv4 runout while this is still the case will hurt those new entrants disproportionately;
The assertion that reducing the amount of IPv4 given will encourage those entrants to support IPv6 is tentative at best. The LIR entrance is a means to an end, and either it provides enough IPv4 for the task at hand, or it does not (ergo you seek another option). A stunning number of LIR applications are - as far as I can tell from this corner - from those that would have otherwise applied for IPv4 PI space. Any sane 'new entrant' (e.g. startup ISP/host) relying on the LIR application solely isn't going to succeed. Whether you give them 1024 or 256 addresses, it's just a per-address cost. It doesn't make IPv6 any more fit for the same purpose, or worth the engineering time at a point where your sole concentration is on not going bust. Because I don't see a way in which this policy will change anyone's behaviour, or incentivise them differently over the current policy, I don't believe it needs to be changed. If you would like, we can take IPv6 adoption out of the argument completely, and I can still be solely against it for the reason of changing the status quo on acceptable prefix sizes for no perceivable gain to anyone.
So the problem we face with the DFZ I think is not specifically "smallest prefix in the table" but "growth of number of entries over time." Entries over time keeps going up, and RIR policies have very successfully kept that growth contained.
"I've deaggregated our /19 to /24s to prevent hijacks." is the problem. Legitimate traffic engineering is not the issue here, it's the blatant disregard for the cost of TCAM across the DFZ versus the selfish/misguided security requirements of certain network operators. The concern is that those persons will, very quickly, deaggregate to the minimum possible prefix size.
If you then fear that this deaggregation would spread to the rest of the DFZ: yes, I share this fear. In fact I think we can be very sure that this is coming, one way or another; Randy explained how based on history earlier in the thread.
Yes, and I pointed out to Randy in response that the stakes are hell of a lot higher than they were in 1995. Like, "we're not the butt of all jokes" higher. -- Tom