Arnold Nipper arnold at nipper.de
Fri Apr 17 14:00:53 CDT 2009

On 17.04.2009 20:52 Paul Vixie wrote

> with the advent of vlan tags, the whole idea of CSMA for IXP networks is passe.
> just put each pair of peers into their own private tagged vlan and let one of
> them allocate a V4 /30 and a V6 /64 for it.  as a bonus, this prevents third
> party BGP (which nobody really liked which sometimes got turned on by mistake)
> and prevents transit dumping and/or "pointing default at" someone.  the IXP no
> longer needs any address space, they're just a VPN provider.  shared-switch
> connections are just virtual crossconnects.

Large IXP have >300 customers. You would need up to 45k vlan tags,
wouldn't you?

Arnold Nipper / nIPper consulting, Sandhausen, Germany
email: arnold at nipper.de       phone: +49 6224 9259 299
mobile: +49 172 2650958         fax: +49 6224 9259 333

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