C
HAPTER
11
| Quality of Service
Packet Scheduling
– 84 –
Figure 26: Priority-to-Queue Mapping
PACKET SCHEDULING
You can set the switch to service the queues based on a strict rule that
requires all traffic in a higher priority queue to be processed before lower
priority queues are serviced, Weighted Fair Queuing (WFQ), or Weighted
Round-Robin (WRR) queuing that specifies a relative weight of each queue.
The traffic classes are mapped to one of the eight egress queues provided
for each port. You can assign a weight to each of these queues (and
thereby to the corresponding traffic priorities). This weight sets the
frequency at which each queue will be polled for service, and subsequently
affects the response time for software applications assigned a specific
priority value.
PARAMETERS
◆ Scheduling Algorithm — Selects the service method used for port
egress queues.
■
Weight-fair-queue — Services the egress queues containing data
based on the weight of the queue compared to the sum of the
weights of all queues. (This is the default selection.)
■
Weight-round-robin — Shares bandwidth at the egress ports by
using the scheduling weights for queues 1 through 8 respectively.
WRR specifies a relative weight for each queue that determines the
To Next Page
Loading...
Need help?
General