NLB Common Troubleshooting Steps
Following are the general steps that one may want to try while troubleshooting commong NLB (WLBS) issues like: 1) Nodes not converging. 2) Adding a node to the NLB cluster stops the cluster from working. 3) Unable to access NLB from another VLAN. 4) NLB not working properly. 1) First collect the "WLBS Display" logs from all the nodes. Compare them for any mismatching rule or Parameter. Try to find if you see frequent convergence happening. If you see lot of convergence happening but nodes never getting converged then you might want to check the heart beat communication. If you find an error message like "cluster Mode Stopped" then again youmight want to check the heart beat communication as well as for any misconfiguration in the NICs. Also make sure that your NICs drivers are updated and you don't have teaming enabled on the nodes. Teaming causes lot of such issue. Moreover NLB cluster is not recommended with teaming enabled on the nodes. 2) Try to ping the VIP...