[address-policy-wg] Just say *NO* to PI space -- or how to make it lessdestructive
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Gert Doering
gert at space.net
Sun Apr 23 13:59:13 CEST 2006
Hi, On Mon, Apr 24, 2006 at 09:39:30AM +0100, Nick Hilliard wrote: > Gert Doering wrote: > >The nice thing about Internet (as opposed to the telephone system) is > >the fact that we have DNS - and thus no need to take our "numbers" with > >us to be reachable. > > This is certainly the theory. However, if you are a growing ISP, > renumbering from PA space from another LIR to your own PI space or > LIR/PA space can be - depending on how your customers are configured - > pure pain. Yes. Been there, done that. Couple of times (renumbering an ISP's recursive name servers is *very much* pain). But that's local pain. PI is global pain to everybody else. > The portability associated with PI space is also important in one other > view, in that it allows the holder to switch providers quickly and > efficiently. There's no tie-in of any form, and this is something which > is extremely important to business. This is the standard argument, but only half-true. For serious internet connections, you usually need to move your leased-line connection, or move your servers to a new colocation - which is, assuming ``standard'' setups and some planning in advance, comparable if not more effort to changing the addresses. A poorly planned network, with everything hardcoded everywhere (up to applications that access IP addresses hard-coded in the source) is not a proper excuse to burden everbody else's routers. I accept that PI for BGP multihoming purposes is - today - one of the more reasonable ways to achieve the goal (ISP independence and resilience), but I still hope that we won't ever see the "let's get PI once, and never have to renumber again!" land rush. Gert Doering -- NetMaster -- Total number of prefixes smaller than registry allocations: 92315 SpaceNet AG Mail: netmaster at Space.Net Joseph-Dollinger-Bogen 14 Tel : +49-89-32356-0 D- 80807 Muenchen Fax : +49-89-32356-234
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