Sun Microsystems x4422a, User Manual

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32 Sun Dual Gigabit Ethernet and Dual SCSI/P Adapter Installation and User’s Guide • January 2004
If all these parameters are set to 1, autonegotiation will use the highest speed
possible. If all these parameters are set to 0, you will receive the following error
message:
Flow Control Parameters
The
ce
device is capable of sourcing (transmitting) and terminating (receiving)
pause frames conforming to the IEEE 802.3x Frame Based Link Level Flow Control
Protocol. In response to received flow control frames, the
ce
device can slow down
its transmit rate. On the other hand, the
ce
device is capable of sourcing flow control
frames, 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 3-3
provides flow control keywords and describes their function.
NOTICE: Last setting will leave ce0 with no link capabilities.
WARNING: ce0: Restoring previous setting.
TABLE 3-3
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 depending on the
value of
adv_asmpause_cap
. (Default=0)
If
adv_asmpause_cap
= 1 while a
dv_pause_cap
= 1
pauses are received.
If
adv_asmpause_cap
= 1 while a
dv_pause_cap
= 0
pauses are transmitted.
If
adv_asmpause_cap
= 0 while a
dv_pause_cap
= 1
pauses are sent and received.
If
adv_asmpause_cap
= 0 then a
dv_pause_cap
determines whether Pause capability is on or off.