Normally, you do not need to restart srcmstr. The
default record in /etc/inittab for both AIX 4.3.2 and AIX 4.2.1 is shown in
Table 32:

Table 32: Default scrmstr Record in the /etc/inittab File
If the srcmstr daemon terminates abnormally, the respawn action specified in
the /etc/inittab restarts the srcmstr daemon. The srcmstr daemon then
determines which SRC subsystems were active during the previous invocation. The
daemon reestablishes communication with these subsystems (if it existed
previously) and initializes a private kernel extension and the srcd
daemon to monitor the subsystem processes. Note that the
process ID is changed after srcmstr is terminated and restarted automatically
as shown in Figure 81.
Figure 81: Restart of the srcmstr Daemon
However, if you have edited the /etc/inittab file adding the -r or -B flag to /usr/sbin/srcmstr, you have to use the command init -q to reexamine the /etc/inittab or reboot to make the new flags effective. The -r flag prevents srcmstr to respond to remote requests, and -B runs srcmstr in a pre-AIX 4.3.1 mode.