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Assigning Default Frame Relay Rewrite Rule to IQE PICs

On the Enhanced IQ (IQE) PICs with the Frame Relay encapsulation, you can rewrite the discard eligibility (DE) bit based on the loss priority of the Frame Relay traffic. A rewrite rule sets the DE bit to the class-of-service (CoS) value 0 or 1, based on the assigned loss priority of low, medium-low, medium-high, or high for each outgoing frame.

The default Frame Relay rewrite rule contains the following settings:

The default rule sets the DE CoS value to 0 for each outgoing frame with the loss priority set to low or medium-low. The default rule sets the DE CoS value to 1 for each outgoing frame with the loss priority set to medium-high or high.

To assign the default Frame Relay rewrite rule to an interface:

  1. Include the frame-relay-de default statement at the [edit class-of-service interfaces interface interface-name unit logical-unit-number loss-priority-rewrites] hierarchy level.

    For example:

  2. Verify the configuration in operational mode.