Cisco Catalyst 2950 Software Guide

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Catalyst 2950 Desktop Switch Software Configuration Guide
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Chapter 13 Configuring QoS
Configuring QoS
Beginning in privileged EXEC mode, follow these steps to modify the DSCP-to-CoS map:
To return to the default map, use the no mls qos map dscp-cos global configuration command.
This example shows how the DSCP values 26 and 48 are mapped to CoS value 7. For the remaining
DSCP values, the DSCP-to-CoS mapping is the default.
Switch(config)#mls qos map dscp-cos 26 48 to 7
Switch(config)#exit
Switch#show mls qos maps dscp-cos
Dscp-cos map:
dscp: 0 8 10 16 18 24 26 32 34 40 46 48 56
-----------------------------------------------
cos: 0 112237445577
Configuring CoS and WRR
Note Both the enhanced and standard software images support this feature.
This section describes how to configure CoS priorities and weighted round-robin (WRR):
• CLI: Configuring CoS Priority Queues, page 13-24
• Configuring WRR, page 13-24
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
mls qos map dscp-cos dscp-list to cos Modify the DSCP-to-CoS map.
For dscp-list, enter up to 13 DSCP values separated by spaces. Then enter
the to keyword.
For cos, enter the CoS value to which the DSCP values correspond.
The supported DSCP values are 0, 8, 10, 16, 18, 24, 26, 32, 34, 40, 46, 48,
and 56. The CoS range is 0 to 7.
Step 3
end Return to privileged EXEC mode.
Step 4
show mls qos maps dscp-to-cos Verify your entries.
Step 5
copy running-config startup-config (Optional) Save your entries in the configuration file.

Cisco Catalyst 2950 Specifications

General

Forwarding Bandwidth	8.8 Gbps
Switching Capacity	13.6 Gbps
Forwarding Rate	6.6 Mpps
Weight	3.6 kg
RAM	16 MB
Flash Memory	8 MB
Operating Humidity	10% to 85% non-condensing
Uplink Ports	2 x 10/100/1000Base-T
Dimensions	4.4 cm x 44.5 cm x 24.2 cm
Remote Management Protocol	SNMP, Telnet, HTTP
Features	Quality of Service (QoS), VLAN support
Compliant Standards	IEEE 802.3, IEEE 802.3u, IEEE 802.1D, IEEE 802.1Q, IEEE 802.1p
Status Indicators	system
Operating Temperature	0 to 45°C
Ports	24 x 10/100 Ethernet ports
MAC Address Table Size	8, 192 entries
Power Supply	Internal 100-240V AC, 50-60Hz