How to reserve Spectrum tcp ports on Linux

Document ID : KB000113164
Last Modified Date : 05/09/2018
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Sometimes when starting the Spectrum applications on Linux, they are not able to start because the ports they bind to are already being used by another process. 

Spectrum 10.2.3 and older on Linux
To reserve the tcp ports that Spectrum uses, the following can be added to the /etc/sysctl.conf file:


After adding the above, run the following command:

sysctl -p

: You must be the root user or have sudo root privileges 

NOTE: The Spectrum 10.3 installation updates the /etc/sysctl.conf file with the Spectrum ports.
Additional Information:
For a complete list of ports used by Spectrum processes, please reference the "Default Port Configurations" section of the documentation located at