| Description | string | This class represents a specialization to the general concept of forwarding network traffic by adding specific semantics that characterize the operation of the Expedited Forwarding (EF) Service (defined in RFC 2598).
The EFService class is modeled as a specialization of DiffServService, which is in turn a specialization of QoSService. This enables it to be related to a higher-level QoS service as well as to lower-level sub-services (e.g., classification, metering, dropping, queuing, and others).
The EF PHB can be used to build a low loss, low latency, low jitter, assured bandwidth, end-to-end service through DiffServ domains. Such a service appears to the endpoints like a point-to-point connection or a virtual leased line. This service has also been described as Premium service in the IETF literature.
The EF PHB is not a mandatory part of the DiffServ architecture (e.g., a node does not have to implement the EF PHB to be considered DiffServ-compliant. However, when a DiffServ-compliant node claims to implement the EF PHB, the implementation must conform to the specification given in RFC2598.
RFC 2598 defines one DSCP for the EF service. Thus, there is no need to define any attributes in this class, since an instance of the EFService class, by definition, means that this particular DSCP is used. | None | TRANSLATABLE= true |