Chapter 3 Configuring Driver Parameters 27
If all of the previous parameters are set to 1, autonegotiation will use the highest
speed possible. If all of the previous parameters are set to 0, you will receive the
following error message:
Note – In the previous example, vca0 is the Sun Crypto Accelerator 4000 board
device name where the string, vca, is used for every Sun Crypto Accelerator 4000
board. This string is always immediately followed by the device instance number of
the board. Hence, the device instance number of the vca0 board is 0.
Flow Control Parameters
The vca 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 flowcontrol frames, the vca device is capable of
reducing its transmit rate. Alternately,the vca device is capable of sourcing flow
control frames, requesting the link partner to reduce its transmit rate if the link
partner supports this feature. By default, the driver advertises both transmit and
receive pause capability during autonegotiation.
TABLE3-3 provides flow control keywords and describes their function.
NOTICE: Last setting will leave vca0 with no link capabilities.
WARNING: vca0: Restoring previous setting.
TABLE3-3 Read-Write Flow Control Keyword Descriptions
Keyword Description
adv-asmpause-cap Both the MMF and UTP adapters support asymmetric pause; hence, thevca
device 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)
ParameterValue + Parameter Value = Description
adv-asmpause-cap=adv-pause-cap=
11or0adv-pause-capdetermines which
directionpauses operate on.
1 1 Pauses arereceived but are not
transmitted.