16 Enforcement depends on whether the Service Provider is set up to handle the same CoS.
Carrier Ethernet 67
Service Frame Delivery An EVC allows Ethernet service frames to be exchanged between
UNIs that are connected via the same EVC. These may be data frames or control
frames. A service provider can indicate what types of frames are supported and those
that are not, and also the type of support provided, using four service frame delivery
attributes. These are listed next.
Unicast Service Frame Delivery The unicast service frame is defined by the destination
MAC address, which may be known (learnt by the network) or unknown. For each
UNI pair, this EVC service attribute specifies whether unicast service frames are to be
discarded, delivered conditionally (and the specific conditions), or unconditionally.
Multicast Service Frame Delivery In this EVC service attribute, a range of destination
MAC addresses are specified, and for each UNI pair, whether multicast service
frames are to be discarded, delivered conditionally (and the specific conditions), or
unconditionally.
Broadcast Frame Delivery The IEEE 802.3 defines the broadcast address as a destination
MAC address of all 1s.
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