IXP

Sat Apr 18 16:58:24 UTC 2009

On Sat, Apr 18, 2009 at 04:01:41PM +0000, Paul Vixie wrote:
> > Date: Sat, 18 Apr 2009 10:09:00 +0000
> > From: bmanning at vacation.karoshi.com
> > 
> > 	... well...  while there is a certain childlike obession with the
> > 	byzantine, rube-goldburg, lots of bells, knobs, whistles type
> > 	machines... for solid, predictable performance, simple clean
> > 	machines work best.
> 
> like you i long for the days when a DELNI could do this job.  nobody
> makes hubs anymore though.  but the above text juxtaposes poorly against
> the below text:

	i never said i longed for DELNI's  (although there is a naive
	beauty in such things)  

	i make the claim that simple, clean design and execution is best.
	even the security goofs will agree.   

> but either way it's not a DELNI any more.  what i see is inevitable
> complexity and various different ways of layering that complexity in.  the
> choice of per-peering VLANs represents a minimal response to the problems
> of shared IXP fabrics, with maximal impedance matching to the PNI's that
> inevitably follow successful shared-port peerings.
> 

	complexity invites failure - failure in unusual and unexpected
	ways.  small & simple systems are more nimble, faster and more resilient.
	complex is usually big, slow, fraught w/ little used code paths, a veritable
	nesting ground for virus, worm, half-baked truths, and poorly tested
	assumptions.

	one very good reason folks move to PNI's is that they are simpler to do.
	More cost-effective -AT THAT performance point-.

	I worry (to the extent that I worry about such things at all these days)
	that the code that drives the Internet these days is bloated, slow, and
	generally trying to become the "swiss-army-knife" application of critial
	infrastructure joy.  witness BGP.  more knobs/whistles than you can shake
	a stick at.   the distinct lack of restraint by code developers in their
	desire to add every possible feature is argueably the primary reason the
	Internet is so riddled with security vulnerabilities.

	I'll get off my soap-box now and let you resume your observations that 
	complexity as a goal in and of itself is the olny path forward.  What
	a dismal world-view.

--bill