is there a market for this?

Tue Jul 22 10:03:41 UTC 1997

Cisco calls their busses CxBus, CyBus which have the same clockrate (something about 22 MHz) but differs with the "largeness" of 32 and 64 bits and uses them for transport among different modules. The PCI is used only internaly on the same module.

----------
Od:	Jacques Vidrine[SMTP:nectar at staff.communique.net]
Odesláno: 	22. července 1997 2:36
Komu:	'Jeremiah Kristal'; Chris Wilson
Kopie:	Perry E. Metzger; nanog at merit.edu
Předmět: 	RE: is there a market for this?

FWIW, I can't confirm this at this second, but I believe that at least
the cisco 7200 series routers have a three PCI bus backplane.  And it is
claimed to support an OC-3c VIP2 port adapter, although I haven't put
mine in action to try yet (and when I do I won't be running anywhere
near 155 Mbps anyway).   A single VIP2 port adapter can only connect to
one of the three buses, so presumably cisco believes that PCI is up to
the task.    I don't know what the clockrate is, and I don't know if it
is 32-bit or 64-bit.

> -----Original Message-----
> From:	Jeremiah Kristal [SMTP:jeremiah at corp.idt.net]
> Sent:	Monday, July 21, 1997 5:40 PM
> To:	Chris Wilson
> Cc:	Perry E. Metzger; nanog at merit.edu
> Subject:	Re: is there a market for this?
> 
> On Mon, 21 Jul 1997, Chris Wilson wrote:
> 
> 
> Actually, I've seen a PCI-based box doing 15MByte/sec sustained
> read/write
> to disk, so it is possible to do it, but it's not likely to be
> standard
> for quite a while.  I certainly think that an OC-12 card would be
> overkill
> though.  I'm also wondering why someone who can afford an OC-x would
> be
> trying to save a couple bucks by using a PCI-based router.  
> Once you get into this type of bandwidth, I think a bus becomes a
> serious
> chokepoint.
> 
> 