[eepro100] Speed and Duplexing, Once Again
UNX Group
unxgroup@optonline.net
Wed Nov 28 20:23:01 2001
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Donald,
I have read now several times in your responses:
"Forcing the duplex and speed is usually a mistake"
Could you please expand on this for a newcomer to
Linux but experienced with Unix, although certainly
not to your level of expertise with networking and these
drivers.
I recently inherited sa responsibility for a large number
of RedHat Linux 7.0 systems. All machines have a variation
of Intel NIC, all utilizing e100 or eepro100. All systems are
being "forced", via modules.conf, to 100Mbs, full-duplex.
I notice, via dmesg, that we recv the message:
On "eepro100" systems, recv dmesg:
"Forcing 100Mbs half-duplex operation."
modules.conf specifies:
options eth0 options=0x20 full_duplex=1
On "e100" systems, recv dmesg:
"e100 - Intel 8255x-based Ethernet"
"eth0: Mem: <xxxx> IRQ: 16 Speed: 100 Dx:Full"
modules.conf specifies:
options eth0 e100_speed_duplex=4
We are transmitting voice and video and the developers
tell me immediately when they believe the boards are running
at 10Mbs. They are insistent that the "forcing" be done but
I am concerned, from your comments, that something else
is wrong. I appreciate your comments very much. Thank you
in advance.
Don Schulze
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<DIV><FONT face=Arial size=2>Donald,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I have read now several times in your
responses:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>"<FONT face="Times New Roman" size=3>Forcing the
duplex and speed is usually a mistake"</FONT></FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Could you please expand on this for a newcomer
to</FONT></DIV>
<DIV><FONT face=Arial size=2>Linux but experienced with Unix, although
certainly</FONT></DIV>
<DIV><FONT face=Arial size=2>not to your level of expertise with networking and
these</FONT></DIV>
<DIV><FONT face=Arial size=2>drivers.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I recently inherited sa responsibility for a large
number</FONT></DIV>
<DIV><FONT face=Arial size=2>of RedHat Linux 7.0 systems. All machines
have a variation</FONT></DIV>
<DIV><FONT face=Arial size=2>of Intel NIC, all utilizing e100 or eepro100.
All systems are</FONT></DIV>
<DIV><FONT face=Arial size=2>being "forced", via modules.conf, to 100Mbs,
full-duplex.</FONT></DIV>
<DIV><FONT face=Arial size=2>I notice, via dmesg, that we recv the
message:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>On "eepro100" systems, recv dmesg:</FONT></DIV>
<DIV>"Forcing 100Mbs half-duplex operation."</DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>modules.conf specifies:</FONT></DIV>
<DIV><FONT face=Arial size=2>options eth0 options=0x20
full_duplex=1</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>On "e100" systems, recv dmesg:</FONT></DIV>
<DIV><FONT face=Arial size=2>"e100 - Intel 8255x-based Ethernet"</FONT></DIV>
<DIV><FONT face=Arial size=2>"eth0: Mem: <xxxx> IRQ: 16 Speed:
100 Dx:Full"</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>modules.conf specifies:</FONT></DIV>
<DIV><FONT face=Arial size=2>options eth0 e100_speed_duplex=4</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>We are transmitting voice and video and the
developers</FONT></DIV>
<DIV><FONT face=Arial size=2>tell me immediately when they believe the boards
are running</FONT></DIV>
<DIV><FONT face=Arial size=2>at 10Mbs. They are insistent that the
"forcing" be done but</FONT></DIV>
<DIV><FONT face=Arial size=2>I am concerned, from your comments, that something
else</FONT></DIV>
<DIV><FONT face=Arial size=2>is wrong. I appreciate your comments very
much. Thank you</FONT></DIV>
<DIV><FONT face=Arial size=2>in advance.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Don Schulze</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV></BODY></HTML>
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