Which action is needed to configure ReadOnly SNMPv3 on a Cisco UCM cluster?

While the SNMP user is defined on the publisher, the configuration is then applied to *all* nodes in the cluster, making the statement incomplete without mentioning cluster-wide application.

Community strings are used for SNMPv1 and SNMPv2c for authentication, whereas SNMPv3 employs a more secure user-based security model with authentication and privacy protocols.

SNMPv3 relies on a user-based security model for authentication and authorization, not community strings. In a Cisco UCM cluster, an SNMP user with ReadOnly access privileges must be defined on the publisher node, and this configuration is automatically applied to all subscriber nodes within the cluster to ensure consistent monitoring capabilities.

Community strings are used for SNMPv1/v2c, not SNMPv3, and even for v1/v2c, a community string defined on the publisher would typically apply to all nodes unless otherwise specified.