4 Byte AS tested

Geoff Huston gih at apnic.net
Thu Jan 11 23:10:05 UTC 2007

At 09:33 AM 12/01/2007, Anderson, Matthew R [NTK] wrote:
>One test case I would like to see is alternating 2- and 4-byte ASNs 
>in the path.  This may be harder.  E.g., AS_PATH = 1239 23456 1221 
>23456 23456 23456.  Or how about an AS_PATH including the 4-byte ASN 
>placeholder (23456) whose origin is a 2-byte OLD speaker?  E.g., 
>AS_PATH = 1239 23456 1221 23456 23456 23456 12234.

I've done a number of small scale permutations with BGP 
configurations, but larger tests of the form you describe here will 
need some more willing participants, particularly if we are 
interested in doing this in the context of the Internet itself rather 
than in a collection of small scale ebgp peerings.


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