North American Network Operators Group
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Re: 4 Byte AS tested

  • From: Geoff Huston
  • Date: Thu Jan 11 18:23:16 2007

At 09:04 AM 12/01/2007, MAEMURA Akinori wrote:
Hi Randy,

Yes.  We can never have the knowledge of *all* BGP speakers
in the world, then keeping a 4-byte ASN announced to let
everyone observe it looks a good strategy to see what would
be happening.

The test you did has already proven that the current Internet
routing system has no serious problem with 4-byte ASN.
( Did it have any? )


No, there were no problems with this particular exercise. What this test confirmed (for this path) is that opaque path attributes marked as optional and transitive do indeed pass through the deployed BGP fabric without alteration. This is a reassuring confirmation!

regards,

Geoff