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Re: v6 multihoming and route filters
On 5-jul-2006, at 21:23, email@example.com wrote:
This argument would be considerably more persuasive if there was some
other group picking up the slack.
ah, but there are other groups picking up the slack...
e.g. your ISP and their peers.
There is a big difference between individual entities doing
individual things that make sense for them, and agreeing on something
that's good for everyone.
And since the IETF is (hopefully) the place where internet routing is
er, not clear that the IETF is the place where internet
routing is best understood... except from a theory standpoint.
there is a distinct difference between a specification (IETF),
an implementation (ZEBRA), and operation (your ISP)...
You make it sound like there is no overlap between the different
groups. Unlike other standards organizations, anyone can participate
in the IETF and even though the balance between different groups
could be better, the IETF still enjoys a wide variety of people and
occupations in its constituency.
it is none of the IETF's business to tell me or your ISP how
it can and can not run its business.
There is a big difference between providing information about what's
a good idea and creating/enforcing rules. The former should be part
of the IETF's business, the latter probably shouldn't.
Such advice might also mention the
fallicy of a "global routing table"
Making value judgements in standards is nearly never a good idea.
What is a standard other than a big fat value judgement?
your view of standards is apparently different than mine.
i guess that in the end, if the IETF codifies this, we are
back to classfull routing and hardcoding address boundaries...
which turns back years of attempts to remove arbitrary bounds
checking that was implemented in IPv4 in the early days ...
The lesson was poorly learned because through some back doors we're
now in the situation where having /64 subnets is pretty much mandatory.
But we were talking about inter-domain routing. Filtering on prefix
size is a very useful technique that does indeed have unfortunate
side effects. But if you want to get rid of this technique you'll
have to come up with something to replace it... Not filtering is not
a reasonable long-term strategy.