The value of tIPsecClientDBClientIdPeerPfx specifies the peer IP prefix within the client ID of this IPsec client entry. A client ID may consist of more than values (e.g., IDi (i.e., tIPsecClientDBClientIdIdiValue), peer IP prefix (i.e., tIPsecClientDBClientIdPeerPfx)). Which type of values a client ID contains is configured by tIPsecClientDatabaseMatchType in the associated entry of tIPsecClientDatabaseTable. This value must be set in the same SNMP SET PDU as tIPsecClientDBClientIdPeerPfxTyp and tIPsecClientDBClientIdPeerPfxLen. Once tIPsecClientDBClientIdPeerPfx is configured to any valid IP prefix, tIPsecClientDBClientIdPeer4PfAny and tIPsecClientDBClientIdPeer6PfAny must be configured to 'false (2)' in the same SNMP SET PDU.
Sources for this description
Netdisco MIB archive copiesNokia networking MIB copies (LibreNMS/Observium Community)