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Overview of QOS service classes and administrative weights

The Passport 8600 Switch supports eight output queues per port into which the packet can be placed. Each of the eight queues is mapped to one of the eight QoS levels, and queues are serviced using guaranteed Weighted Round Robin.

Administrative weights are assigned to each queue as a percentage of the total number of possible packet transmit opportunities. For example, an administrative weight of 100 indicates that this queue has 32 packet transmit opportunities. An administrative weight of 50 indicates that this queue has 50% of the possible 32 packet transmit opportunities, or 16.

• QoS traffic service classes