Terms and Acronyms

destination class usage (DCU)—A method of grouping certain types of traffic and monitoring these groups through CLI show commands, accounting profiles, or SNMP. DCU uses a destination address lookup when determining group membership. For more information about DCU, see the JUNOS Policy Framework Configuration Guide.
source class usage (SCU)—A method of grouping certain types of traffic and monitoring these groups through CLI show commands, accounting profiles, or SNMP. SCU uses a source address lookup when determining group membership. For more information about SCU, see the JUNOS Policy Framework Configuration Guide.
source address (SA)—The IP address of a device sending a packet. This address is included in the IP header and is analyzed by the router for a variety of services, including source-based filtering, policing, class of service (CoS), and SCU.
destination address (DA)—The IP address of a device intended as the receiver for a packet. This address is included in the IP header and is the main address analyzed by the router during routing table lookups and DCU.