Classifying Frame Relay Traffic

For J-series Services Router interfaces with Frame Relay encapsulation, you can set the loss priority of Frame Relay traffic, based on the discard eligibility (DE) bit. For each incoming frame with the DE bit containing the CoS value 0 or 1, you can configure a Frame Relay loss priority value of low, medium-low, medium-high, or high.

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.

This section is organized as follows:

• Assigning the Default Frame Relay Loss Priority Map to an Interface
• Defining a Custom Frame Relay Loss Priority Map
• Verifying Your Configuration

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