Proper way to configure NIC in full duplex

[William Ashworth]

Hello,

I'm using an r10 nic and have all the information already configured in
rc.conf, however, transfer speeds are unusually slow (i.e., 55-60kbps when
it SHOULD be somewhere near 1.00mbps+)

Someone told me that I might not be running the interface in full duplex.
How can I determine this?  How can I fix it if I am not currently running in
full duplex?

Any assistance is appreciated and below is the output of my interface
information:

www# ifconfig rl0
rl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        inet 246.193.67.3 netmask 0xffffff00 broadcast 216.194.67.255
        inet6 fe80::248:54ff:fe3d:350%rl0 prefixlen 64 scopeid 0x1
        inet 66.51.100.209 netmask 0xfffffff0 broadcast 66.51.100.223
        inet 66.51.100.210 netmask 0xfffffff0 broadcast 66.51.100.223
        inet 66.51.100.211 netmask 0xfffffff0 broadcast 66.51.100.223
        inet 66.51.100.212 netmask 0xfffffff0 broadcast 66.51.100.223
        inet 66.51.100.213 netmask 0xfffffff0 broadcast 66.51.100.223
        inet 66.51.100.214 netmask 0xfffffff0 broadcast 66.51.100.223
        inet 66.51.100.215 netmask 0xfffffff0 broadcast 66.51.100.223
        inet 66.51.100.216 netmask 0xfffffff0 broadcast 66.51.100.223
        inet 66.51.100.217 netmask 0xfffffff0 broadcast 66.51.100.223
        inet 66.51.100.218 netmask 0xfffffff0 broadcast 66.51.100.223
        inet 66.51.100.219 netmask 0xfffffff0 broadcast 66.51.100.223
        inet 66.51.100.220 netmask 0xfffffff0 broadcast 66.51.100.223
        inet 66.51.100.221 netmask 0xfffffff0 broadcast 66.51.100.223
        inet 66.51.100.222 netmask 0xfffffff0 broadcast 66.51.100.223
        ether 00:48:54:3d:03:50
        media: Ethernet autoselect (none)
        status: active

Thanks,

William Ashworth
will at pchammer.net