User guide

Trunk Ether net QoS Schedule Con fi g
Trun k Ethernet VL A N QoS Sc hedule Co nfig Screen
This screen specifies the the packet egress scheduling configuration when QoS support is enabled.
The packet scheduling is weighted round robin (WRR), the setting [Weight] is applied to the four queues.
This approach prevents the lower priority frames from being starved out with only a slightly increased delay to the
higher priority packets, and guarantee the minimal packet rate of one queue.
The range of weight for each port is between 1 and 127. For Queue3 and Queue4, the strict priority scheduling is
supported.
If there is strict priority (only in Q2 and Q3) and WRR at the same time, the queue with strict priority has higher
priority than WRR. When the scheduler scans queues, queues with strict priority are scanned first, and than the
other queues are scanned according to WRR.
If there is more one queue with strict priority, the queue with the bigger queue ID has higher priority.
76! RLH Industries, Inc. • 866-DO-FIBER • www.fiberopticlink.com! System Configuration