check_serial_signals is used to monitor the handshaking lines on the serial ports
check_port_log is used to monitor the data logged for a serial port.
10.4.3 Additional plug-ins
Additional Nagios plug-ins (listed below) are available for Advanced Console Servers (LES1208A-R2,
LES1216A-R2, LES1232A, LES1248A-R2:
You can download these plug-ins from the Nagios plug-ins package from www.blackbox.com.
You can also download and run bash scripts (primarily check_log.sh).
To configure additional checks, save the downloaded plug-in program in the tftp addins
directory on the USB flash and save the downloaded text plug-in file in /etc/config
To enable these new additional checks, select Seria l& Network: Network Port, then Edit the
Network Host you want to monitor, and select New Checks. The additional check option is
included in the updated Nagios Checks list, and you can again customize the arguments.
10.4.4 Number of supported devices
Ultimately the number of devices that by any particular console server can support depends upon the
number of checks made, and how often they are performed. Access method will also play a part. The
table below shows the performance of three of the console servers:
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