
Configuring Traffic Filters and Protocol Prioritization
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To configure the percent of bandwidth for the priority queues, you edit these
Configuration Manager parameters:
• High Queue Percent Bandwidth
• Normal Queue Percent Bandwidth
• Low Queue Percent Bandwidth
When changing bandwidth allocation, remember that the percent of bandwidth for
the High queue, Normal queue, and Low queue must total 100 percent.
Queue Size
Queue size (or queue depth) is the configurable number of packets that each
priority queue can hold. The default value for bandwidth allocation is 20 packets,
regardless of packet size.
When you set the queue size, you assign buffers (which hold the packets) to each
queue. A queue is full when it exceeds the buffer size. The router discards (clips)
traffic sent to a full queue.
To configure queue size, you edit these Configuration Manager parameters:
• High Queue Size
• Normal Queue Size
• Low Queue Size
• High Water Packets Clear
Note:
If statistics indicate that the High queue does not have enough buffers,
consider reducing the amount of high-priority traffic. You should be selective
in assigning high-priority status. Too many traffic types with high-priority
status can defeat the purpose of protocol prioritization. With the strict
dequeuing algorithm, too much high-priority traffic can result in discarding (or
clipping) normal- and low-priority traffic.
Note:
The buffer size for priority queues is not configurable when using the
strict dequeuing algorithm.
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