SMC Networks EZ Card1000, User Manual

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C
ONFIGURING AND
T
ESTING THE
N
ETWORK
C
ARD
3-2
configuration the switch will sense the link speed but will default
to half duplex. If the link partner is configured to full duplex, the
adapter will not connect correctly resulting in high error rates and
inefficient communication. Therefore, auto-negotiation should be
disabled when connecting to a card with fixed configuration.
Network Type
This field is used to select link speed and duplex capabilities of the
adapter. When auto-negotiate is disabled, these are the settings of
the card. The default value is “Auto.”
Network Address
This field lets you set a local network MAC address to override the
permanent MAC address that is stored in EEPROM on the card. This
feature is useful if the adapter is being used in a test environment.
However, for normal use it is recommended to retain the factory-set
“Permanent” MAC address.
Jumbo Frame Size
The adapter can be configured to use Jumbo Frames. This increases
the maximum Ethernet frame size to greater than 1514 bytes. Using
Jumbo Frames greatly reduces packet processing overhead and can
boost throughput by up to 300% for bulk data transfers.
Note: To use Jumbo Frames, both communicating computers
must have network cards that support this feature. Also, at
full duplex, all switches in the network between the two
end computers must be able to accept the extended frame
size. With half-duplex connections, all devices in the
collision domain need to support Jumbo Frames.
IEEE Compliance.
This option should be set to disabled if the link partner does not
comply to the IEEE802.3 specifications for 1000BASE-T network
adapters. This is often characterized by an intermittent connection
and can occur with older gigabit ethernet hardware.