4 Byte AS tested

Geoff Huston gih at apnic.net
Thu Jan 11 23:05:56 UTC 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!



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