Sun Microsystems Ethernet Device Driver none - Manual (Page 19)

Parameter Definitions 11
3
Defining the Current Status
The read-only parameters described in Table 3-2 explain the operational mode
of the interface. These parameters define the current status.
Inter-Packet Gap Parameters
The Fast Ethernet Parallel Port SCSI (FEPS) ASIC supports 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 3-3 lists the default values and allowable values for the inter-packet gap
(IPG) parameters,
ipg1 and ipg2 .
Table 3-2 Read-Only Parameters Defining the Current Status
Parameter Values Description
transceiver_inuse 0
1 = Internal transceiver
= External transceiver
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
Table 3-3 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)