RE: 32bit Cardbus 10/100 Fast Ethernet NIC recommendations for Th inkPad

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From: Cottrell, Eric (ecottrell_at_doble.com)
Date: Wed Sep 04 2002 - 17:42:27 EDT

Hello,

Well I tried some tests but the Linksys PCMPC200 is not working.
I changed to SuSE 8.0 and it looks like the tulip driver is at a
level known not to work with the PCMPC200. I use the Xircom day
to day.

The same driver (it mentions it is modified to work with
Xircom) is used for the Xircom RBE-100. A driver message
mentions that it is using the Dec 21143 mode of the card. So I
only tested the Xircom. I am using SuSE 8.0 with the 2.4.18
kernel. The PCMCIA drivers are D. Hinds PCMCIA-CS package
version 3.1.33. Hardware was a TP 600e with 288 Megs of Ram,
a 366 MHz Pentium II processor, and a 4200 RPM 30 GB hard drive.

I have a simple network consisting of a Linksys 4 port switch/DSL
router. All the tests went through the switch. All tests used
full duplex (one of the advantages of using a switch).

Ping times to the router were from 0.62 to 0.77 millSecond (MS).
Ping tines to the ftp host on a desktop with a Linksys LNE100TX NIC
were 0.10 to 0.12 MS. Ping times to a small server using an
intergrated SiS900 chip were 0.14 to 0.16 MS. Both systems are
using different recent versions of Linux. Hum looks like the
hardware on the other end does make a difference 8->.

I used ncftp in "Extended Passive Mode" to transfer files
between the systems.

Put (TP -> Desktop) 74049955 byte file in 11 seconds at 5.99 MB/s
Get (Desktop -> TP) 74049955 byte file in 6 seconds at 11.16 MB/s

Put (TP -> Desktop) 89047265 byte file in 13 seconds at 6.07 MB/s
Get (Desktop -> TP) 89047265 byte file in 7 seconds at 11.22 MB/s

So not including the overhead the best I can get is about 89 Megabits
per second data transfer. It also appears that the TP is alittle
short of horsepower to get a file and put it up on a FTP server.
The FTP Server is a 1 GHz P3 with a 7200 RPM HD.

I have gotten similar results in the past when using the Linksys PCMPC200
with the fixed linux driver.

73 Eric ecottrell_at_doble.com

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