Cisco's AIP vs HSSI

Tue Oct 15 13:56:26 UTC 1996

> Date: Tue, 15 Oct 1996 09:46:23 -0400
> From: kri at bellcore.com (Padma Krishnaswamy)
> To: nanog at merit.edu, salo at msc.edu (Tim Salo)
> Subject: Re: Cisco's AIP vs HSSI
> 
> One other point about the  AIPs relative to the  HSSI/DSU ; you may not be
> interested in this feature , but the AIPs implement traffic shaping- ie You
> can set Peak and Average rates and burst size; you could use this to
> subrate your traffic -should you be in a situation where this is desirable.

That is my understanding.

I think that this is part of a some more general observations:

o	The AIP card is a more intelligent card and can perform more
	functions today and is much more likely to perform more functions
	in the future.

o	I suspect that few, if any, new ATM features will be added to the
	HSSI card.

Again, your router vendor should be telling you all of this.

> I havent looked around to check out any new ADSU type products since mid 95,
> but it used to be that you could not do this with an ADSU.

This is also my understanding.  I thought I saw some work being done
on an enhanced DXI specification, (the interface between the router and
the ATM DSU), but I think that, for the most part, not much work is
being done with ATM DSU solutions today.  ATM DSUs were largely
developed as a quick-to-market solution for adding ATM functionality
to routers, without the need for new router boards.  Their time has passed.

-tjs