Greetings!
"Bartfai, Attila" wrote:
> One of our customer using Sun Ultra 10 with 1 quad (4*10/100) card.
> They want to enhance their box with another quad card, but the SUN not
> recommend this. They recommend to upgrade the SUN U 10 to Ultra E 250...
The reason for this is that the U10 only has one single PCI bus (IIRC).
PCI is good for a maximum throughput of ~1Gbit/s (33Mhz * 32 bit width).
For each full duplex network interface you have a maximum throughput of 200Mbit/s
(100in + 100out = 200 to the PCI bus). With the builtin card plus a quad card you
have 5 network interfaces which will have a max. throughput of 200 + 4* 200 = 1000
Mbit/s (if you use them all in 100Mbit/s fullduplex) = PCI bus limit.
Because of this Sun recommends their bigger irons with two or more separate PCI
busses:
* E250 with 2x 33Mhz PCI (not sure - maybe like the E220R/E420R's, too)
* E220R / E420R with 1x 33Mhz PCI plus 1x 66Mhz PCI
* E450 with 6x PCI
But if you intend to use only/mainly "low speed" (10Mbit/s) connections via the
network interfaces, I do not see a major problem using more than QFE in an Ultra-10.
But make the customer aware of this bus / speed limitation for updates - and be sure
to mark it highly visible within the documentation. Customers tend to change their
minds ("That's not what we wanted!") - and techs (like me) tend to forget what was
not written down... ;-)
Bye
Volker
--
Volker Tanger <[EMAIL PROTECTED]>
--------------------------------------------
Sr. Security Engineer Tel. +49-69-92901-570
--------------------------------------------
Global One
Global Security
Global Service Engineering
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