[6bone] private ASNs and the Default-Free-Zone

[Gert Doering]

Hi,

On Fri, Oct 25, 2002 at 06:15:51AM -0400, John Fraizer wrote:
> This is not a problem:
> 
> ipv6-site:    COMPENDIUM-AR
> origin:       AS45328
> descr:        Compendium, Buenos Aires, AR
> country:      AR
> prefix:       3FFE:8260::/28

I disagree.  It's not a major problem, like the one below, but I think
this object should not be there either.

> *THIS* is a problem:
> 
> 
> Border2-BGP> sh ipv6 bgp 3ffe:8260:2010:1:2a0:c9ff:fe01:9600
> BGP routing table entry for 3ffe:8260::/28
> Paths: (11 available, best #8, table Default-IP-Routing-Table)
> 
>   1930 2200 5511 1752 1849 1890 45328

Strongly seconded.

[..]
> Come on, if Nicolas can get an ASN, so can COMPENDIUM.

And if you don't have an AS#, use a private AS, don't just grab any number
that seems to be available.

> Beyond that, if you peer with someone who uses a private ASN, use the
> following command (or equiv for your router) on the peering session:
> 
>  neighbor 3ffe:xxxx::xxxx remove-private-AS

And make sure that you never ever do transit through a private AS# - it
will really break everything related to BGP paths, like "find a short
path", or "troubleshoot weird problems".

Even better, never give transit to a private AS# either.

Give that enterprise connectivity, yes, but do it static, and don't
mess with BGP origin AS manipulations.

Gert Doering
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