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Re: filtering long prefixes
From: Willi Huber <huber () chx400 switch ch>
Date: Tue, 26 Sep 1995 10:11:30 +0100 (MET)

Yes, Geert Jan, but if you look at the list I prepared,
you'll note that the only chunks of old style Bs that are
18-bits long all come from one home-AS and most are in a
pair of old-style class Bs which easily could be aggregated
into a single /15 with the loss of some routing specificity
(which is lost anyway when that provider's internal metrics
don't propagate to its external peers).

The remainder of the 'chunks' of old style Bs are
all longer than 18 bits, and most are /24s or /26s,
and I see none at all that appear difficult to aggregate,
or which look like anything other than leaks due to

If you get to the point where someone needs to have a /18
in the old-style class B space and it can't be aggregated,
we can return to this.



the Municipality of Zuerich has got assigned 1/2 class B in April this year 
after a long discussion with RIPE NCC. They will soon get onto Internet.
I need to be sure that this address space is routed on the Internet.

Sean, Geert-Jan, could you comment, please.


Willi Huber

inetnum: -
netname:     ZUERI-NET
descr:       Municipality of Zuerich
descr:       Zuerich. Switzerland
country:     CH
admin-c:     BM16-RIPE
tech-c:      BM16-RIPE
changed:     huber () switch ch 950412
source:      RIPE

person:      Beat Morf
address:     Organisation & Informatik der Stadt Zuerich
address:     Wilhelmstrasse 10
address:     CH-8022 Zuerich
phone:       +41 1 279 92 62
phone:       +41 1 279 91 11
fax-no:      +41 1 279 93 85
e-mail:      beat.morf () oiz stzh inet ch
nic-hdl:     BM16-RIPE
changed:     huber () switch ch 950601
source:      RIPE

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