[eepro100] experience with iANS and FEC

Schlomo Schapiro schapiro@mobileye.com
Tue Jan 1 04:22:00 2002


I am looking for people who successfully set up FEC with iANS and the e100
driver. Couldn't find anything useful on google except this list. I saw
plenty of e100 related messages in the archive so I assume that it is OK
to talk about the Intel driver here, too.

I got 3 cards (1 Intel 100/Pro S Desktop and 2 Intel 100+ Management) and
a HP ProCurve 4000 switch. I setup ians and the switch to do FEC and all
seems well, I can unplug any of the 3 cables and no traffic is lost (and I
see meaningful and appropriate messages in the syslog). However, I don't
manage to see the tripled bandwith.

I used 3 ways to check myself:
1) SNMP reports from the switch: Never more than 10MB/sec.
2) I copied  data from the server to 3 different clients (each with a
single 100MBit connection) with netcat. The first one gets 10MB/sec, I
start the 2nd client and each gets 5MB/sec, with 3 clients each gets
3) I actually have a *second* server with an identical setup connected to
the same switch. netcatting data between these 2 servers also gives only

Besides proving that my network works very well at 100MB/sec I didn't
manage to get the desired effect of FEC.

Can anybody give me some tips about this topic ? Experience (positive &
negative) ? I would like to find people who did this (preferrably with HP
switches) successfully.

Thank you very much,
S. Schapiro

Schlomo Schapiro
Senior System Administrator
MobilEye Vision Technologies Ltd.

24 Mishol Hadkalim St., Jerusalem, Israel
Telephone:  + 972-2-586-6989 Ext. 131
Mobile:     + 972-55-767898
Fax:        + 972-2-586-7720

email: schapiro@mobileye.com
WWW:   http://www.mobileye.com