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Catalyst 2960 Switch SoftwareConfiguration Guide
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Chapter29 Co nfiguring QoS
Configuring Standard QoS
Default Egress Queue Configuration
Table29-9 shows the de fault egress queue configuration for each queue-set when QoS is enabl ed. All
ports are mapped to queue-set 1. The port bandwidth lim it is set to 100 percent and rate unlimited.
Table29-10 shows the default CoS output queu e threshold map when QoS is enabled.
Table29-11 shows the default DSCP output queue threshold map when QoS is enabled.
Table29-9 Default Egress Queue Configuration
Feature Queue 1 Queue 2 Queue 3 Queue 4
Buffer allocation 25 percent 25 percent 25 percent 25 percent
WTD drop threshold 1 100 percent 200 percent 100 percent 100 percent
WTD drop threshold 2 100 percent 200 percent 100 percent 100 percent
Reserved threshold 50 percent 50 percent 50 percent 50 percent
Maximum threshold 400 percen t 400 percent 400 percent 400 percent
SRR shaped weights
(absolute) 1
1. A shaped weight of zero means that this queue is operating in shared mode.
25 0 0 0
SRR shared weights 2
2. One quarter of the bandwidth is allocated to each queue.
25 25 25 25
Table29-10 Default CoS Output Queue Threshold Map
CoS Value Queue ID–Threshold ID
0, 1 2–1
2, 3 3–1
44–1
51–1
6, 7 4–1
Table29-11 Default DSCP Output Queue Threshold Map
DSCP Value Queue ID–Threshold ID
0–15 2–1
16–31 3–1
32–39 4–1
40–47 1–1
48–63 4–1