NIO CommKit Host Interface Installation and System Administration Manual

DKDAEMON(1M) DKDAEMON(1M)

E-22 CommKit Host Interface, Release 4.0

–c channels The number of channels to be used by the host interface. Maximum value should be the

lower of 512 or the tunable channel limit configured by the dkhs(7) driver. The tunable

channel limit configured on your machine is defined by the dkMAXchans variable in /usr/

include/dkit/globals.h. Minimum value allowable is 3. The built-in default value for

channels is 64.

–b urpblocks Number of outstanding URP data blocks used for transmit window calculation on protocol

4 hosts connected to data switches. The default transmit window for incoming and outgoing

calls is divided into urpblocks URP data blocks. Applications are free to select their own

transmit window parameters [See dk_info(3X)] after the call is established, and this option

is silently ignored unless the protocol is set to 4. The value of urpblocks must be a number

between 1 and 7 (inclusive) and the built-in default value is 4.

–p protocol Selects the call setup protocol used by the host interface. Two protocol values are

supported. The default value of 4 selects the protocol used by newer data switches and is

sufficient for most installations. The optional value of 2 selects the protocol used by older

data switches. This option does not imply, nor will it provide, support for a direct

connection to older data switches. It is provided for some rare instances where older

endpoints on the network may be confused by valid parameters of the window size

negotiation. In these cases protocol 2 may provide a less efficient but always valid window

size negotiation. The dkux(7) call processing module automatically negotiates down to

protocol 2 if it is connected to an older data switch. The user, however, must be aware that

while this appears to work there are incompatibilities with the older switches that are

insurmountable. For the reasons stated above dkux(7) will never negotiate up to protocol

4 if a value of 2 is specified.

–w windowsize Configures the Receive Buffer Size used by the host interface when transmit window

negotiation occurs during incoming and outgoing call setup processing. The built-in default

value of 1024 should not be changed or loss of data may result. windowsize must be a power

of 2 in range of 64 and 2048 (inclusive).

FILES

/opt/dk/sbin directory where this command resides

/dev/dk/ctlX dkhs(7) Common Signaling Channel device for interface X

/dev/dknp/daemon TLI subsystem control device

/dev/dk/dkxmx0 remote execution subsystem control device

/var/opt/dk/log/dkdaemonlog default log file

/var/opt/dk/log/dkacct default accounting file