Re: IXP - PNI

[Joe Greco <jgreco () ns sol net>]

> 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.

Didn't we go through all this with ATM VC's at the AADS NAP, etc?

... JG
-- 
Joe Greco - sol.net Network Services - Milwaukee, WI - http://www.sol.net
"We call it the 'one bite at the apple' rule. Give me one chance [and] then I
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