Cisco Catalyst 2960 Series User Manual

SUMMARY STEPS
1.
configure terminal
2.
Use one of the following:
•
mls qos srr-queue input dscp-map queue queue-id threshold threshold-id dscp1...dscp8
•
mls qos srr-queue input cos-map queue queue-id threshold threshold-id cos1...cos8
3.
mls qos srr-queue input threshold queue-id threshold-percentage1 threshold-percentage2
4.
end
5.
show mls qos maps
6.
copy running-config startup-config
DETAILED STEPS
PurposeCommand or Action
Enters global configuration mode.configure terminal
Example:
Switch# configure terminal
Step 1
Maps DSCP or CoS values to an ingress queue and to a threshold ID.Use one of the following:
Step 2
By default, DSCP values 0–39 and 48–63 are mapped to queue 1 and threshold
1. DSCP values 40–47 are mapped to queue 2 and threshold 1.
•
mls qos srr-queue input dscp-map
queue queue-id threshold
threshold-id dscp1...dscp8
By default, CoS values 0–4, 6, and 7 are mapped to queue 1 and threshold 1.
CoS value 5 is mapped to queue 2 and threshold 1.
•
mls qos srr-queue input cos-map
queue queue-id threshold
threshold-id cos1...cos8
•
For queue-id, the range is 1 to 2.
•
For threshold-id, the range is 1 to 3. The drop-threshold percentage for
threshold 3 is predefined. It is set to the queue-full state.
Example:
Switch(config)# mls qos srr-queue
•
For dscp1...dscp8, enter up to eight values, and separate each value with
a space. The range is 0 to 63.
input
•
For cos1...cos8, enter up to eight values, and separate each value with a
space. The range is 0 to 7.
dscp-map queue 1 threshold 2 20 21
22 23 24 25 26
Assigns the two WTD threshold percentages for (threshold 1 and 2) to an
ingress queue. The default, both thresholds are set to 100 percent.
mls qos srr-queue input threshold
queue-id threshold-percentage1
threshold-percentage2
Step 3
•
For queue-id, the range is 1 to 2.
Example:
Switch(config)# mls qos srr-queue
•
For threshold-percentage1 threshold-percentage2, the range is 1 to 100.
Separate each value with a space.
input threshold 1 50 70
Each threshold value is a percentage of the total number of queue descriptors
allocated for the queue.
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
613
How to Configure QoS

Cisco Catalyst 2960 Series Specifications

General

Layer	Layer 2
Power over Ethernet (PoE)	Available on some models
RAM	128 MB
Flash Memory	32 MB
MAC Address Table Size	8000
Operating Temperature	0°C to 45°C (32 to 113°F)
Ports	24 or 48 x 10/100/1000