Cisco IE-3000-8TC

36-13
Cisco IE 3000 Switch Software Configuration Guide
OL-13018-03
Chapter 36 Configuring QoS
Understanding QoS
For more information, see the “Allocating Bandwidth Between the Ingress Queues” section on
page 36-59, the “Configuring SRR Shaped Weights on Egress Queues” section on page 36-65, and the
“Configuring SRR Shared Weights on Egress Queues” section on page 36-66.
Queueing and Scheduling on Ingress Queues
Figure 36-7 shows the queueing and scheduling flowchart for ingress ports.
Figure 36-7 Queueing and Scheduling Flowchart for Ingress Ports
Note SRR services the priority queue for its configured share before servicing the other queue.
90564
Read QoS label
(DSCP or CoS value).
Determine ingress queue
number, buffer allocation,
and WTD thresholds.
Are thresholds
being exceeded?
Queue the packet. Service
the queue according to
the SRR weights.
Send packet to
the internal ring.
Drop packet.
Start
Ye s
No