Sun Microsystems 805-1797-10 - Manual (Page 42)

TABLE C–2 Read-Only Parameters Defining the Current Status
Parameter Values Description
link_status 0
1
Current link status
= Link down
= Link up
link_speed 0
1
Valid only if the link is up
= 10 Mbps
= 100 Mbps
link_mode 0
1
Valid only if the link is up
= Half duplex
= Full duplex
Inter-Packet Gap Parameters
The PCI Fast Ethernet and Expansion (PFEX) ASIC supports the programmable
Inter-Packet Gap (IPG) parameters
ipg1 and ipg2 . The total IPG is the sum of ipg1
and ipg2 . The total IPG is 9.6 microseconds when the link speed set, by the
auto-negotiation protocol, is 10 Mbps. When the link speed is 100 Mbps, the total
IPG is 0.96 microseconds.
Table C–3 lists the default values and allowable values for the inter-packet gap (IPG)
parameters,
ipg1 and ipg2 .
TABLE C–3 Read-Write Inter-Packet Gap Parameter Values and Descriptions
Parameter
Values
(Byte-time)
Description
ipg1
0, 255
ipg1 = 8 (default at initialization)
ipg2
0, 255
ipg2 = 4 (default at initialization)
By default, the driver sets ipg1 to 8-byte time and ipg2 to 4-byte time, which are
the standard values. (Byte time is the time it takes to transmit one byte on the link,
with a link speed of either 100 Mbps or 10 Mbps.)
28 Sun Quad FastEthernet PCI Adapter Installation and User’s Guide
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Revision A, August 1997