Defining a Custom Frame Relay Loss Priority Map

date_range 29-Nov-23

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You can apply a classifier to the same interface on which you configure a Frame Relay loss priority value. The Frame Relay loss priority map is applied first, followed by the classifier. The classifier can change the loss priority to a higher value only (for example, from low to high). If the classifier specifies a loss priority with a lower value than the current loss priority of a particular packet, the classifier does not change the loss priority of that packet.

To define a custom Frame Relay loss priority map:

At the [edit class-of-service loss-priority-maps] hierarchy level in configuration mode, specify the loss priority map for the Frame Relay DE bit.

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[edit class-of-service loss-priority-maps]
user@host# set frame-relay-de name loss-priority level code-points [ alias | bits ];

For example:

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[edit class-of-service loss-priority-maps]
user@host# set frame-relay-de fr_rw loss-priority low code-points 0;
user@host# set frame-relay-de fr_rw loss-priority high code-points 0;
user@host# set frame-relay-de fr_rw loss-priority medium-low code-points 1;
user@host# set frame-relay-de fr_rw loss-priority medium-high code-points 1;

Note:

The loss priority map does not take effect until you apply it to a logical interface.

Apply a rule to a logical interface.

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[edit class-of-service interfaces interface-name unit logical-unit-number loss-priority-maps]
user@host# set frame-relay-de name;

For example:

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[edit class-of-service interfaces so-1/0/0 unit 0 loss-priority-maps]
user@host# set frame-relay-de fr_rw;

Verify the configuration in operational mode.

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user@host> show class-of-service loss-priority-map              
Loss-priority-map: frame-relay-de-fr_rw, Code point type: frame-relay-de, Index: 38
  Code point      Loss priority
  0                low       
  0                high  
  1                medium-low       
  1                medium-high  

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Class of Service User Guide (Routers and EX9200 Switches)

Defining a Custom Frame Relay Loss Priority Map

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Class of Service User Guide (Routers and EX9200 Switches)

Defining a Custom Frame Relay Loss Priority Map

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