If one node cannot be reached for administration and maintenance—that is, if both admin Ethernet ports of the Linux bonding driver are unavailable—Lotus Sametime Unified Telephony provisioning and maintenance is still possible via the partner node. Only direct hardware maintenance is not possible.
The remote admin interface (provided by the maintenance controller) is non-redundant. For that reason, a failure of the maintenance controller card or the Ethernet cable that connects it with the LAN switch will cause an outage of the remote admin capabilities of that Lotus Sametime Unified Telephony node.
The administration server will signal that it lost communication with the Lotus Sametime Unified Voice node. It may still receive alarms from the other node if the active alarming process happens to run on the other node. The administration server will not be able to provision Lotus Sametime Unified Telephony data if the virtual IP address happens to be on the node with the unavailable admin network.
Parent topic: Cluster Redundancy
Double Failures with Collocated Nodes