One other thing that springs to mind is the following issue. Cluster nodes which have installed the change for 6434130 via Solaris 10 kernel patches or builds snv_50 or later of OpenSolaris, will not be able to join/rejoin the cluster if those nodes use GLDv3 interface network drivers for the Cluster private interconnect.
You could verifying if your encountering this problem by removing 138888-?? At present there is no workaround/fix for this issue, but it's currently being worked on through CR6797256 need link property to control 802.1Q priority tagging -- This message posted from opensolaris.org