Hi,
I have some queries around the IPv6 address assignment architecture:
i. What is the currently accepted and agreed upon provider independant address assignment policy in use by RIRs to support multihoming for ISP end-customer organizations.
E.g. I read that currently there is an IPv6 address pool reserved for provider-independant address assignment to ISP clients and the minimum agreed upon prefix-length is a /48
ii. If /48s are used for multihoming address assignment, are there any considerations given to how large it can scale to and how to control the expansion in internet route-table size?
Are there any restrictions or alternatives enforced with regards to the resulting expansion?
iii. Does it also imply that the ISPs are required to accept advertisements upto /48 from peer ISPs and to reject anything above /48 e.g. like /56 etc?
Thanks,
Usman |
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1. You seem to have answered your own question.
2. /48 is the minmum. If you have an end-user multi-homed customer that has more than one end-site, they may be eligible for more than one /48 and multiple /48s in such a case should be issued as an aggregable prefix.
3. RIR policy has no direct impact on what people configure in routers. ISPs are able to set the boundary of what they permit or filter wherever they think it best meets their business needs.
Owen
