Cisco Systems OL-8550-09 Standard QoS Configuration Guidelines

35-37
Catalyst 3750 SwitchSoftware Configuration Guide
OL-8550-09
Chapter35 Configuring QoS
Configuring Standard QoS
Table35-10 shows the default CoS output queue threshold map when QoS is enabled.
Table35-11 shows the default DSCP output queue threshold map when QoS is enabled.
Default Mapping Table Configuration
The default CoS-to-DSCP map is shown in Table35-12 on page 35-67.
The default IP-precedence-to-DSCP map is shown in Table35-13 on page 35-68.
The default DSCP-to-CoS map is shown in Table35-14 on page 35-70.
The default DSCP-to-DSCP-mutation map is a null map, which maps an incoming DSCP value to the
same DSCP value.
The default policed-DSCP map is a null map, which maps an incoming DSCP value to the same DSCP
value (no markdown).
Standard QoS Configuration Guidelines
Before beginning the QoS configuration, you should be aware of this information in these sections:
•“QoS ACL Guidelines” section on page 35-38
•“Applying QoS on Interfaces” section on page35-38
•“Policing Guidelines” section on page35-39
•“General QoS Guidelines” section on page 35-39
Table35-10 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
Table35-11 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