The tmnxDhcpSvrPoolDepleted notification is generated when the actual number of free addresses becomes zero. This notification is only generated for DHCP server instances with the value of tmnxDhcpServerCfgAddrType set to 'ipv4(1)'.
Sources for this description
Multiple manufacturers; see the original MIB MIB copies (LibreNMS/Observium Community)Netdisco MIB archive copiesNokia networking MIB copies (LibreNMS/Observium Community)