Digi 90000566_H Description=string, Ipaddress=ipaddress, Ipport=ipport, Connectonstring=string

set autoconnect

description=string

A name for descriptive purposes only.

ipaddress=ipaddress

The IP address of the network destination to which a connection will be made.

ipport=ipport

The TCP port of the network destination to which a connection will be made.

connect_on_string=string

When the value of the “trigger” option is string, this option specifies the string that must be found in the serial data in order for a connection to occur. The maximum length of this string is 32 characters, including escape sequences for special characters. For more details on the escape sequences, see "Entering Special Characters in String Values" on page

13.The maximum parsed length of this string is 32 characters. That is, this string must reduce down to a 32-character string when the escape sequences are processed.

flush_string={onoff}

Indicates whether the connect string, specified by the

“connect_on_string” option, is flushed or sent over the newly established connection.

on

The connect string is flushed.

off

The connect string is sent over the newly established connection. The default is on.

keepalive={onoff}

Indicates whether or not TCP keepalives will be sent for the specified range of clients. If set to on, keepalives will be sent, if it is off, keepalives will not be sent.

Configurable TCP keepalive parameters, for example, how many keepalives to send and when to send them are configured globally via the “set network” command (see "set network" on page 149).

nodelay={onoff}

Used to allow unacknowledged or smaller than maximum segment sized data to be sent.

Note: The “nodelay” option disables Nagle’s algorithm, which is on by default, for some TCP services. The purpose of Nagle's algorithm is to reduce the number of small packets sent. Briefly Nagle's algorithm says to hold on to outgoing data when there is either unacknowledged sent data or there is less than maximum segment size (typically around 1500 bytes for Ethernet) worth of data to be sent. It does a good job at keeping transmission efficient, but there are times where it is desirable to disable it.

Chapter 2 Command Descriptions 83