"Oracle Recommended Patches" (Doc ID 756671.1) recommends 9655006 - 126.96.36.199.2 Grid Infrastructure Patch Set Update (GI PSU2) for 188.8.131.52 installations, but I couldn't find the patch for Solaris x86-64. In fact, How
to Upgrade to Oracle Grid Infrastructure 11g Release 2 states,
PSU2 is unavailable for Solaris x86-64 systems."
How disappointing, right? Not really. Instead of going to Grid 184.108.40.206.2, go to Grid 220.127.116.11 with patch 10098816.
Sounds easy enough, except that How
to Upgrade to Oracle Grid Infrastructure 11g Release 2 also states:
To upgrade existing 18.104.22.168 Oracle Grid Infrastructure
installations to Oracle Grid Infrastructure 22.214.171.124, you must
first do at least one of the following:
Patch the release 126.96.36.199 Oracle Grid Infrastructure
home with the 9413827 and 9706490 patches.
Install Oracle Grid Infrastructure Patch Set 1 (GI PSU1)
or Oracle Grid Infrastructure Patch Set 2 (GI PSU2).
Since GI PSU2 is not available, and I had trouble finding the patch
number of GI PSU1, I went with p6880880 (OPatch), followed by 9413827
followed by 10098816. (FYI, once 9413827 is installed, it is not necessary to install 9706490 because patch 9706490 is Subset of 9413827.)
Ta-da!! (According to yourdictionary.com, sound of a fanfare: an exclamation of triumph or pride accompanying an announcement, a bow, etc)