[113631] in North American Network Operators' Group
Re: IXP - PNI
daemon@ATHENA.MIT.EDU (Antonio Querubin)
Fri Apr 17 17:44:59 2009
Date: Fri, 17 Apr 2009 11:44:48 -1000 (HST)
From: Antonio Querubin <tony@lava.net>
To: bmanning@vacation.karoshi.com
In-Reply-To: <20090417194427.GA29684@vacation.karoshi.com.>
Cc: Paul Vixie <vixie@isc.org>, nanog@merit.edu
Errors-To: nanog-bounces@nanog.org
On Fri, 17 Apr 2009, bmanning@vacation.karoshi.com wrote:
> the vlan tagging idea is a virtualization of the PNI construct.
> why use an IX when running 10's/100's/1000's of private network
> interconnects will do?
>
>
> granted, if out of the 120 ASN's at an IX, 100 are exchanging on
> average - 80KBs - then its likley safe to dump them all into a single
> physical port and vlan tag the heck out of it.
>
> its those other 20 that demand some special care.
The construct also doesn't scale well for multicast traffic exchange if
there's a significant number of multicast peers even though the traffic
might be low for individual source ASNs. On the other hand, if the IXP
doesn't use IGMP/MLD snooping capable switches, then I suppose it doesn't
matter.
Antonio Querubin
whois: AQ7-ARIN
