5.4. Bandwidth Profile Panel

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Fig. 5.15 Bandwidth Profile panel

A Bandwidth Profile (BWP) enforces limits on bandwidth utilization according to the Service Level Specification (SLS) that has been agreed upon by the Subscriber and the Service Provider as part of the Service Level Agreement (SLA). It can be thought of as enforcing the long term average guaranteed bandwidth (CIR) and excess bandwidth (EIR) allowed by the service.

Select the Bandwidth Profiles tab and click the Create Profile button in the small toolbar at the top of the panel.

Click the cell in the CIR column and enter the committed bandwidth you want the UNIs to provide.

Optionally, click the cell in the EIR column and enter the additional excess bandwidth you want the UNIs to provide.

You can also optionally modify the CBS and EBS values. The default value for both is 12176, according to MEF 13, clause 36.

CIR - Committed Information Rate

CIR (Committed Information Rate) is the bit rate for which the SP provides performance guarantees in terms of performance attributes for the service.

EIR - Excess Information Rate

EIR (Excess Information Rate) is the additional bit-rate that the subscriber can utilize and for which traffic can probably pass through the CEN as long as there is no congestion.

Note

Note that the total rate, sometimes known as PIR (Peak Information Rate), is the sum of CIR and EIR.

CBS - Committed Burst Size

The short-term burst, in bytes, allowed on the UNI for traffic to be conformant.

EBS - Excess Burst Size

The additional short-term burst, in bytes, allowed on the UNI.

Color Markings

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Fig. 5.16 Color Markings

  • Green

    Frames within the CIR / CBS compliance level. These frames are subject to the SLS.

  • Yellow

    Frames exceeding the CIR/CBS but are within the EIR/EBS. These frames are delivered as “best effort” without being subject to the SLS. The CEN may drop some or all of these frames based on congestion conditions in the network.

  • Red

    Frames that do not conform to either the CIR/CBS or the EIR/EBS are dropped.