If a LINKBACK is defined for
/etc/sysconfig/network-scripts/ifcfg-eth0, the glob above will match
all of the linkback targets for that file, including
ifcfg-eth0.default and all node-specific versions of the
file. The system script then tries to bring up the interface several
times with
potentially different configurations. This creates many problems, which could result in losing all static configurations.
For such cases it is desirable to `hide' (with the LINKBACK
-h flag) all linkback targets so that the system scripts
still function correctly.
When a linkback is hidden, all linkback targets will have a '.'
pre-pended to the name, so ifcfg-eth0.default, when hidden,
will become .ifcfg-eth0.default. Remember that all variants
of the file also will need to be hidden. If you want a NODE-specific
version of ifcfg-eth0 for admin1, the file
.ifcfg-eth0.admin1 needs to
be created to hold the configuration.
Note: Hidden LINKBACK directives only apply
to CLASS, NODE, and PROPERTY specific linkback targets.
The mk-sysimage script transitions the .default file between hidden and un-hidden according to the configuration, but it does not alter any other CLASS, NODE, or PROPERTY specific linkback targets. The administrator must ensure that all of these targets are hidden or un-hidden according to the configuration.