Route Server Filters at IXPs and 4-byte ASNs

Nick Hilliard nick at
Sat Jan 25 18:37:42 UTC 2014

On 25/01/2014 15:48, Sebastian Spies wrote:
> To make things worse: even if the IXPs ASN is 2-byte, I would assume,
> that RS implementors chose to interpret extended community strings as
> always being in the format 4-byte:2-byte (see RFC5668).

some ixp operators (e.g. me) are rather enthusiastic about the idea of a
modified form of draft-raszuk-wide-bgp-communities getting more traction.
This would solve this particular problem and many others.


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