Ensure that the speed, duplex mode, and autonegotiation of
the associated switch are configured the same as in the NMMGR configuration
for the PCI 10/100Base-TX card. If the switch supports autonegotiation
on the ports connected to the cards, this should be enabled as explained
in "Notes on Autonegotiation and Autosensing."
The NMMGR default is autonegotiation, so if the switch does
not support it, you will need to change settings before using the link.
NOTE: Operation of a link under mismatched host/hub port setting
conditions may result in poor throughput, disconnects and/or application errors.
Because the PCI 10/100Base-TX LAN card and Core I/O card LAN
port support autonegotiation, you should not normally need to manually
set the duplex mode when connected to a switch port which is also
enabled for autonegotiation. Sometimes you may need to manually
set the duplex mode of the card — for example, if the switch
is operating at full duplex but does not autonegotiate.
Full-duplex mode is most commonly found in switches rather
than hubs. It may be found in either 10 Mbit/s or 100Mbit/s switch
devices. Full-duplex mode may provide a throughput advantage under
some circumstances, but the degree of the advantage is application- dependent.
To manually set the duplex mode of the PCI card, refer to the link
configuration screen in the active NMCONFIG network configuration file,
using NMMGR to access the configuration data and make changes.
The PCI 10/100Base-TX card and the Core I/O card LAN port
support both half- and full-duplex operation.
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