Understanding the Difference between Cisco IM and Presence High-Availability Modes

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Cisco IM and Presence is a messaging and presence solution that provides real-time communication capabilities to users. In high-availability mode, Cisco IM and Presence can provide redundancy and failover capabilities to ensure service availability in the event of a system outage. There are two possible high-availability modes in Cisco IM and Presence: balanced mode and active/standby mode.

Balanced mode provides load balancing and failover capabilities for user services. In this mode, both nodes in the cluster can be active and provide services to users. User services are distributed across both nodes, and if one node fails, the other node takes over the failed node's services. Load balancing is used to distribute user services across both nodes, ensuring that the nodes are used efficiently.

Active/standby mode, on the other hand, provides an always-on standby node that is ready to take over services in the event of a node failure. In this mode, one node is active and provides user services, while the other node is in standby mode and is ready to take over services if the active node fails. However, this mode does not provide load balancing capabilities, as only one node is active at any given time.

To summarize, the major difference between the two possible Cisco IM and Presence high-availability modes is that balanced mode provides load balancing and failover capabilities for user services, while active/standby mode provides an always-on standby node that is ready to take over services in the event of a node failure, but does not provide load balancing capabilities.