While looking for another tidbit of information on Google I found this very interesting setting in a WAS FAQ (Q & A: Frequently asked questions about WebSphere Application Server security). That fact that access to the Integrated Solutions Console (ISC) would stop if a LDAP directory was unavailable even though the ISC admin account was local has been bothering me for a while. It was nice to see that this fact which has been irritating me for a while (when it isn’t set) is solvable.
7. When using a federated repository, is there a way to ensure that my file-based registry will continue to function when a LDAP server is down?
Yes, there is a configuration option that enables the authentication to continue if one or more other registries are down, as long as the ID is found in one of the registries that are still up and functional. The federated repository configuration command to permit this is:
$AdminTask createIdMgrRealm -name ibmRealm -allowOperationIfReposDown true
More information can be found in the Information Center article: IdMgrRealmConfig command group for the AdminTask object.