North American Network Operators Group
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4 Byte AS tested

  • From: Geoff Huston
  • Date: Thu Jan 11 05:37:18 2007 

# bgpctl show rib 203.10.62.0/24
flags: * = Valid, > = Selected, I = via IBGP, A = Announced
origin: i = IGP, e = EGP, ? = Incomplete

flags destination gateway lpref med aspath origin
*> 203.10.62.0/24 147.28.0.1 100 0 0.3130 0.1239 0.4637 0.4637 0.4637 0.4637 0.4637 0.4637 0.1221 1.202 i


George Michaelson, Randy Bush and myself have successfully tested the implementation of 4Byte AS BGP on a public Internet transit. The above BGP RIB snapshot was taken at a 4Byte BGP speaker in North America, showing a transit path across AS 1221, AS 4637, AS 1239 and AS 3130 , with correct reconstruction of the originating AS at the other (4Byte AS) end.

The code base used was OpenBGPD, with 4 byte patches that I've added to the code in the past couple of weeks.

(Patched versions of openbgpd to include 4-byte AS support can be found at http://www.potaroo.net/tools/bgpd/)

cheers,

Geoff