[lir-wg] Sub-allocations, how and when?
Gert Doering gert at space.net
Tue Feb 18 16:31:13 CET 2003
Hi, as the one who made the Sub-Allocation proposal, let me try to clarify a few things. On Wed, Feb 12, 2003 at 12:46:18PM +0000, Kristofer Sigurdsson wrote: > I am currently doing some work for a small ISP with a fair number of > clients, that wants to get a sub-allocation (in accordance with the new > sub-allocations policy). We are going to request a /20 allocation from > our primary uplink. However, we may have difficulties in showing usage > for a /20 assignment for ourselves and our current customers (we're not > far from it, though), but we need this allocation to deal with > near-future customers. We are also going to request an AS in order to > be properly multi-homed, which means we need the /20 right away to > avoid prefix filters. Sub-Allocation size should not be based on routing considerations. If you get a /22 (or similar), and someone "out there" is not accepting that announcement, packets will always travel over your upstream's aggregate (/16 or whatever they announce), so you can be reached. > We could of course, in accordance with the RIPE community's "slow-start" > mechanism, start with a smaller allocation, or even just request > assignments for ourselves, our customers, and then new customers as we > go along, but this would mean lots of CIDR blocks, instead of just > one /20. Depending on the layout and fragemntation of your upstream's network, it might be a good compromise to start with a smaller sub-allocation, but "keep" the remaining part of a /20 available in case you need it. If you really need the /20 quickly, it will be there. (If the address space is not there, I suggest that your upstream talks to the RIPE hostmasters how to solve that - a new allocation might be required. Maybe they can also demonstrate proper assignments of /23s and get their AW raised...) [..] > Now, my question to the list is, when will the sub-allocation policy be > operational, and how will one request such an allocation? Presumably, > RIPE will provide a sample allocation request form, any idea when? There's no official request form (yet) because the sub-allocation thing is something that's happening between you and your upstream. The NCC is /not/ involved here (normally). > Any ideas on how to do this without a sub-allocation? Any way for our > uplink to "reserve" a /20, which would then origin from our AS, and then > assign chunks of it to us as we go along, maybe? This would be the traditional way that people have been doing it before the sub-allocation policy. It's messy, cause you can't properly document what's happening. Gert Doering -- NetMaster -- Total number of prefixes smaller than registry allocations: 56285 (56029) SpaceNet AG Mail: netmaster at Space.Net Joseph-Dollinger-Bogen 14 Tel : +49-89-32356-0 80807 Muenchen Fax : +49-89-32356-299
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