Half/full duplex
Stavros Kassinos
kassinos@eddy.stanford.edu
Thu Apr 1 18:22:10 1999
How can I make sure that a 3c905 card is running in half-duples mode? I
am using it to connect a home LAN server (linux box with 2 NICS) to
another linux box via a hub and the transfer rates are extremely low. I
have been told that when used with a hub 3c905 should be in half-duplex
mode. Is this correct? And if yes then how can I set it to that? In the
options listed in http://cesdis.gsfc.nasa.gov/linux/drivers/vortex.html
I do not see one specifically for half-duplex. I know the card is
running in full-duplex because I run the vortex-diag. Also noted some
checksum errors (?). Here's the output:
./vortex-diag -a -e -m
vortex-diag.c:v1.07 11/24/98 Donald Becker (becker@cesdis.gsfc.nasa.gov)
Found a 3Com PCI Ethernet 3c905 rev 0 at 0xff00.
Indication enable is 06c6, interrupt enable is 069e.
No interrupt sources are pending.
Transceiver/media interfaces available: MII.
MAC settings: full-duplex.
Maximum packet size is 0.
Station address set to 00:10:4b:9a:ec:4a.
Configuration options 4000.
Parsing the EEPROM of a 3Com Vortex/Boomerang:
3Com Node Address 00:10:00:10:00:10 (used as a unique ID only).
OEM Station address 00:10:00:10:00:10 (used as the ethernet address).
Manufacture date (MM/DD/YY) 0/16/0, division , product .
Options: none.
Vortex format checksum is incorrect (00 vs. 10).
Cyclone format checksum is incorrect (00 vs. 10).
MII PHY found at address 24, status 786f.
MII PHY 0 at #24 transceiver registers:
3100 786f 2000 5c01 0141 40a1 0001 0000
0000 0000 0000 0000 0000 0000 0000 0000
0000 0000 0000 0000 0000 0000 0001 8060
8020 0c38 0000 1800 a3b9 0076 1405 001b.
Thanks for any help.
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