Command descriptions set realport
ConnectPort® LTS Command Reference
100
set realport
Purpose
Configures and displays RealPort-related settings.
Required permissions
For products with root and non-root (normal) users, the root user can configure RealPort settings. The
normal user can display RealPort settings.
Syntax
Configure RealPort settings
set realport [keepalive={on|off}]
[exclusive={on|off}]
Display current RealPort settings
set realport
Options
keepalive={on|off}
Enables or disables sending of RealPort keepalives. RealPort keepalives are messages inside the
RealPort protocol, sent approximately every 10 seconds, to tell whoever is connected that the
connection is still alive. RealPort keepalives are different from TCP keepalives, which are done at the
TCP layer, and configurable. The default is “on.” As RealPort keepalives generate additional traffic--
several bytes every 10 seconds--this option allows you to turn them off. RealPort keepalives may
cause issues in environments that are metered for traffic, or that do not require this type of
mechanism. In situations such as cellular/mobile wireless communications, when you are paying by
the byte, such additional traffic is undesirable when a TCP keepalive can do the same job, and only
when the connection is idle. If you want to have the RealPort keepalive set to “off;” consider using a
TCP keepalive instead. This is because if the link is not closed properly, you could end up with your
port being “locked up” with a dead TCP session, which is why RealPort keepalives were implemented
in the first place.
exclusive={on|off}
Enables or disables exclusive mode for RealPort connections. Exclusive mode allows the device to
close an existing RealPort connection and establish a new one immediately upon a new connection
request from the same IP address. This mode is useful when using RealPort over wide area networks,
which can be unstable and where you are charged by the byte (such as cellular or satellite), and you do
not wish to incur costs for keep-alive traffic. Exclusive mode allows your application to retain
continuity when temporary, unexpected interruptions in network connectivity occur.
Example
#> set realport keepalive=on
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