Confirming MF Classification

To confirm that your MF classifier is working correctly, you can monitor the queue counters for the router’s egress interface used when forwarding traffic received from the peer. Displaying the queue counters for the ingress interface (fe-0/0/2) does not allow you to check your ingress classification, because queuing generally occurs only at egress in the JUNOS software. (Ingress queuing is supported on Gigabit Ethernet IQ2 PICs only, as discussed in Configuring CoS on Ethernet IQ2 Interfaces.)

1. To determine which egress interface is used for the traffic, use the traceroute command.
2. After you identify the egress interface, clear its associated queue counters by issuing the clear interfaces statistics interface-name command.
3. Confirm the default forwarding class-to-queue number assignment. This allows you to predict which queues are used by the VoIP, NC, and other traffic. To do this, issue the show class-of-service forwarding-class command.
4. Display the queue counts on the interface by issuing the show interfaces queue command.

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