Fixed Boundary (/29) Assignments
Judith Heffernan judithh at excitehome.net
Sat Feb 17 07:53:55 CET 2001
As an employee of a large broadband provider, I agree with the recommendation of allowing ISPs the ability to provide residential subscribers multiple IP addresses without having the subscriber provide usage-based requirements. It doesn't scale to extend the rules that apply to commercial end users to residential subscribers. This would be equivalent to a tier 1 ISP having to manage the justification of IP address requests of 3million tier 2 ISPs. It doesn't scale. The subscriber should not just be assigned /29 worth of address space when they sign up for the service whether they need it or not. However, if the subscriber sign's up for the service requesting 2 or 3 CPE addresses, they shouldn't have to submit a RIPE-141 form or provide some other justification. It should simply be a service that the ISP can provide. We have many subscribers with multiple CPE addresses - however, that doesn't necessarily mean they have their own subnet. In a broadband cable environment, the subscribers off of the same downstream shares the same broadcast domain. The downstream is assign /24 which the subscribers are addressed out of. A subscriber with two CPE's may not have consecutive IP addresses. Would this mean the subscriber would have to register each /32? Or that the ISP has to ensure that the subscriber gets consecutive addresses (that would be a huge operational overhead for the ISP). The ISP should be responsible of ensuring the /24 is being effectively utilized. And this can be done the same way it is today for one CPE as it can for multiple. -Judith
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