Figure 2.8 illustrates
the profiles.
?– Ingress bandwidth profile per ingress UNI This profile provides rate enforcement
for all Service Provider frames entering the UNI from subscriber to provider
networks. This is useful when only a single service is supported at the UNI, i.e., the
UNI is basically considered to be a pipe. The pipe??™s diameter (bandwidth profile)
can be controlled by varying the CIR and EIR parameters. Rate enforcement is non
discriminating and some frames may get more bandwidth than others.
?– Ingress bandwidth profile per EVC This bandwidth profile provides more
granular rate enforcement for all service frames entering the UNI that are associated
with each EVC. This is useful when multiple services are supported at the
UNI; if each EVC is considered to be a pipe inside of a larger UNI pipe, then the
bandwidth profile of the EVC??”or diameter of the pipe??”can be controlled by varying
CIR and EIR values.
?– Ingress bandwidth profile per CoS (or CE-VLAN CoS) This bandwidth profile
provides rate enforcement for all service frames belonging to each CoS associated
with a particular EVC. The CoS is identified via a CoS identifier determined
via the
pair, so that this bandwidth profile applies to frames
over a specific EVC with a particular CoS value or even a set of CoS values.
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