user manual

39-35
Catalyst 3750-X and 3560-X Switch Software Configuration Guide
OL-21521-01
Chapter 39 Configuring QoS
Configuring Standard QoS
Default Egress Queue Configuration
Table 39-9 shows the default egress queue configuration for each queue-set when QoS is enabled. All
ports are mapped to queue-set 1. The port bandwid
th limit is set to 100 percent and rate unlimited.
Table 39-10 sh
ows the default CoS output queue threshold map when QoS is enabled.
Table 39-11 sh
ows the default DSCP output queue threshold map when QoS is enabled.
Ta ble 39-9 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 percent 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
Ta ble 39-10 Default CoS Output Queue Threshold Map
CoS Value Queue ID–Threshold ID
0, 1 2–1
2, 3 3–1
4 4–1
5 1–1
6, 7 4–1
Ta ble 39-11 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