Cisco Catalyst 3560-X Software Configuration Manual page 930
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Also See for Catalyst 3560-X:
- Command reference manual (1188 pages) ,
- Software configuration manual (1438 pages) ,
- Manual (276 pages)
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Understanding QoS
In shared mode, the queues share the bandwidth among them according to the configured weights. The
bandwidth is guaranteed at this level but not limited to it. For example, if a queue is empty and no longer
requires a share of the link, the remaining queues can expand into the unused bandwidth and share it
among them. With sharing, the ratio of the weights controls the frequency of dequeuing; the absolute
values are meaningless. Shaping and sharing is configured per interface. Each interface can be uniquely
configured.
For more information, see the
page
"Configuring SRR Shared Weights on Egress Queues" section on page
Queueing and Scheduling on Ingress Queues
Figure 1-9
Figure 1-9
(DSCP or CoS value).
Determine ingress queue
number, buffer allocation,
and WTD thresholds.
Queue the packet. Service
the queue according to
Catalyst 3750-X and 3560-X Switch Software Configuration Guide
1-16
"Allocating Bandwidth Between the Ingress Queues" section on
1-81, the
"Configuring SRR Shaped Weights on Egress Queues" section on page
and
Figure 1-10
show the queueing and scheduling flowcharts for ingress ports.
Queueing and Scheduling Flowchart for Ingress Ports on Catalyst 3750-X Switches
Start
Read QoS label
Yes
Are thresholds
being exceeded?
No
the SRR weights.
Send packet to
the stack ring.
Drop packet.
Chapter 1
Configuring QoS
1-88, and the
1-89.
OL-25303-03
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Troubleshooting
