The Gigabit Ethernet intelligent cards are
designed to maximize host CPU efficiency by performing
functions such as TCP/IP checksum and interrupt coalescing. Bulk
data transfers can be optimized by using Jumbo
Frames; the large 9000-byte maximum transfer unit (MTU) improves system
efficiency.
The 1000Base-T cards are trispeed cards that support autonegotiation
and autosensing. They operate in full-duplex mode
at 10, 100 and 1000 Mbit/s or in half-duplex mode
at 10 and 100 Mbit/s.
1000Base-SX supports
full-duplex point-to-point or back-to-back (via switch to card or card
to card) operations only. The cards
do not support half-duplex and do not speed negotiate (1000 Mbit/s
operation only), but do perform autonegotiation for other link parameters.
For more detailed information on the currently supported Gigabit
Ethernet cards, drivers, and the platforms that support them, see
the HP-UX Ethernet Driver Support Matrix, Edition 2 (for
Releases of Sept 2004 and Later) on http://docs.hp.com
under “Networking and Communications.”
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