nanog mailing list archives

RE: What is the most standard subnet length on internet


From: "Tomas L. Byrnes" <tomb () byrneit net>
Date: Tue, 23 Dec 2008 11:12:13 -0800

What I was describing is filtering the announcements of /24s that are
part of larger allocations. Not filtering the announcements of "The
Swamp".


-----Original Message-----
From: Skywing [mailto:Skywing () valhallalegends com]
Sent: Monday, December 22, 2008 7:08 PM
To: Valdis.Kletnieks () vt edu; Nathan Ward
Cc: nanog list
Subject: RE: What is the most standard subnet length on internet

Snarky replies aside, it might be interesting to hear if there are any
real examples of this being done intentionally and not out of not
knowing better or otherwise configuration error.  For example, Tomas
Byrnes's suggestion re: hijacking; although, I suspect that in that
case, he's speaking of someone doing this filtering on a one-off basis
and not on all /24's in the DFZ.

- S

-----Original Message-----
From: Valdis.Kletnieks () vt edu [mailto:Valdis.Kletnieks () vt edu]
Sent: Monday, December 22, 2008 10:05 PM
To: Nathan Ward
Cc: nanog list
Subject: Re: What is the most standard subnet length on internet

On Tue, 23 Dec 2008 14:44:46 +1300, Nathan Ward said:

Why are people doing this? Are they lacking clue, or, is there some
reasonable purpose?

The total number of routing cluons is apparently a fixed quantity.  The
number of AS's is known to be increasing. Do the math.




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