[101368] in North American Network Operators' Group
Re: v6 subnet size for DSL & leased line customers
daemon@ATHENA.MIT.EDU (Vinny Abello)
Wed Jan 2 13:55:20 2008
Date: Wed, 02 Jan 2008 13:53:18 -0500
From: Vinny Abello <vinny@tellurian.com>
To: Donald Stahl <don@calis.blacksun.org>
CC: Joe Abley <jabley@ca.afilias.info>,
Iljitsch van Beijnum <iljitsch@muada.com>,
Christopher Morrow <morrowc.lists@gmail.com>,
NANOG list <nanog@nanog.org>
In-Reply-To: <20080102131624.F35387@calis.blacksun.org>
Errors-To: owner-nanog@merit.edu
Donald Stahl wrote:
>
>> in real life; people still find it necessary to carve up their
>> aggregates and announce more-specifics in strategic directions. I
>> would suggest that not *all* observed instances of such deaggregation
>> are due to operator ignorance
> There's a big difference between deaggregating a couple of bits for TE
> purposes and announcing 64 /24's from your /18 :)
>
> We need to decide what's acceptable as a community and then enforce it
> as a community. If someone starts announcing dozens of prefixes in v6
> then they get blocked they either get blocked or they get a filter that
> restricts them to their covering route (or blocks them if they don't
> have it).
On this note: In the v6 world when multihoming, what size network block is the minimum recommended allocation? In the v4 Internet, most major networks I've seen do not accept anything longer than /24 and this is what is allocated to customers with their own AS when multihoming regardless of the usage of the /24. I'm just curious if this is currently outlined somewhere already as what was decided. Are we going to see /64's, /56's or /48's polluting the v6 routing table just as /24's are today on the v4 table? I understand most of that pollution is not because of multihoming, but rather TE or negligence/lack of clue. With the advent of 32 bit ASN's, this could possibly become a concern however... that and people trying to do TE with their v6 space as they did with v4. I agree with the above reply that this needs to be ironed out as a community and was curious how multihoming customer networks fit into this equation.
--
Vinny Abello
Network Engineer
vinny@tellurian.com
(973)940-6100 (NOC)
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