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Appendix C
Setting BIG/ip system control variables
The BIG/ip Controller hardware and software boot up with a
configuration specified, in part, by the system control variables
stored in the /etc/rc.sysctl file. Most of these variables are standard
BSD UNIX system control variables, while some are used
exclusively by the BIG/ip Controller. In most cases, a variable is
just toggled off (0) or on (1), but some variables may also store
specific values, such as a port number.
You can use three methods to set system control variables affecting
the BIG/ip Controller:
C-2
❖
The F5 Configuration utility
Navigate to a system control variable and edit it in the browser
with the F5 Configuration utility.
❖
sysctl command
Write system control variable values directly to /etc/rc.sysctl
using this command line utility.
❖
vi or pico
Use a text editor, such as vi or pico, to edit /etc/rc.sysctl directly.
F5 Networks, Inc.