The IESG Approved the Expansion of the AS Number Registry

Florian Weimer fw at
Fri Dec 1 17:10:54 UTC 2006

* Chris L. Morrow:

>> | 6. Transition
>> |
>> |    The scheme described in this document allows a gradual transition
>> |    from 2-octet AS numbers to 4-octet AS numbers. One can upgrade one
>> |    Autonomous System or one BGP speaker at a time.
>> Routers on stub ASs don't need upgrading at all, for instance.
> but filter lists and such I imagine might :(

Only if you want to keep your fine-grained filters, which shouldn't be
a problem over the next few years.  From a purely BGP 4 perspective,
the transition looks like a new tier 1 ISP entering the stage.

(But if more than one of your peers switch, you better upgrade as

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