North American Network Operators Group

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Private ASN suppression

  • From: Howard C. Berkowitz
  • Date: Tue May 16 12:29:06 2000

I'm trying to understand the problem being solved by the Cisco private AS removal feature. In particular, what advantages does it offer over confederations, which would seem to do the same thing when externally advertising customer routes? Is there a performance benefit?

RFC1998-style multihoming with a private AS is a possible application, I suppose, for any routes that are NOT marked with NO-EXPORT.