IPv6 PI allocation

Niels Bakker niels=cluenet at bakker.net
Thu May 17 19:43:28 CEST 2007

>> RFC3178-style multihoming will create more entries in the global 
>> routing table once a network using that connects to an IXP.

* itojun at itojun.org (Jun-ichiro itojun Hagino 2.0) [Thu 17 May 2007, 19:36 CEST]:
>not at all.  RFC3178 does not require ISPs to announce any specific 
>routes (other than /29 or /32 of the ISP).

RFC3178 exists in some kind of fantasy world.  Quoting from it, "3. 
Basic mechanism": "We assume that our site is connected to 2 ISPs, ISP-A 
and ISP-B."

This is an unrealistic requirement for the reasons I spelled out (the 
need to connect to an IXP, plus the need for independence from any ISP's 
network - you cannot withdraw an announcement from a particular broken 
upstream except by pulling all DNS records).

	-- Niels.

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