Intel PCI-X user manual Edit Makefile 2.Un-commentthe following define

GigMAC-PMC and PCI
GigPMC Switch	Board and Driver Users Manual
dmUtil -m eth0	# displays DP83820 MAC controller registers
dmUtil -p eth0	# displays gigabit (phy) transceiver registers
dmUtil -e eth0	# displays eeprom
dmUtil -a eth0	# displays mac address
dmUtil -ms eth0	# displays mac stats (Intel only)

LOOPBACK PERFORMANCE TESTING

1.Edit 'Makefile'

2.Un-comment the following define:

CFLAGS += -DNS_FRAME_TEST -DIN_FRAME_TEST

3.Save file, unload and reload driver using procedures described above.

4.Use "ifconfig" command to bring up Ethernet interface.

5.Run the following command from the 'util' directory:

./dmUtil -l eth1 # loopback eth0, eth1, etc.

6. View statistics using dmUtil command as follows:

./dmUtil -s eth1 1 # second arg=1 zeroes statistics after gathering

Note: The driver must be compiled without "-DNS_FRAME_TEST" for normal operation.

Jumbo frames: The mtu size can be increased using the ifconfig utility, as follows:

# ifconfig <interface-name> mtu <mtu-size>

Example: ifconfig eth0 mtu 3000

Note: Use of jumbo frames is not recommended as it is not IEEE standard and many switches do not support the forwarding of jumbo frames. It also has to be enabled and negotiated on both ends of the connection and in today’s faster systems, using jumbo frames offers little performance improvement and may only be useful in closed application-specific networks.

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