Sun Microsystems Gigabit Ethernet MMF/UTP Adapter - Manual (Page 71)

Chapter 3 Configuring ipge and e1000 Driver Parameters 37
If all these parameters are set to 1, autonegotiation uses the highest speed possible.
If all these parameters are set to 0, you receive the following error message:
Flow Control Parameters
The ipge device sources (transmits) and terminates (receives) pause frames
conforming to the IEEE 802.3x Frame Based Link Level Flow Control Protocol. In
response to received flow control frames, the ipge device can slow down its
transmit rate. The ipge device sources flow control frames by requesting the link
partner to slow down, provided that the link partner supports this feature. By
default, the driver advertises both transmit and receive pause capability during
autonegotiation.
TABLE 3-6 provides flow control keywords and describes their function.
Gigabit Link Clock Mastership Controls
Link clock mastership was introduced with gigabit twisted-pair technology. One
side of the link is the master that provides the link clock and the other side is the
slave that uses the link clock. Once this relationship is established, the link is up, and
NOTICE: Last setting will leave ipge0 with no link capabilities.
WARNING: ipge0: Restoring previous setting.
TABLE 3-6 Read-Write Flow Control Keyword Descriptions
Keyword Description
adv_asmpause_cap The adapter supports asymmetric pause, which means it
can pause only in one direction.
0=Off (default)
1=On
adv_pause_cap This parameter has two meanings, each depending on the
value of adv_asmpause_cap. (Default=0)
• If adv_asmpause_cap = 1 while adv_pause_cap = 1,
pauses are received.
• If adv_asmpause_cap = 1 while adv_pause_cap = 0,
pauses are transmitted.
• If adv_asmpause_cap = 0 while adv_pause_cap = 1,
pauses are sent and received.
• If adv_asmpause_cap = 0, then adv_pause_cap
determines whether Pause capability is on or off.