Software Requirements; Qos Default Configuration; Configuring Qos On The Switch - Cisco WS-C2948G-GE-TX Configuration Manual

Software Requirements

Software Requirements
QoS requires supervisor engine software release 5.2 or later releases. Use the show port capabilities
command to determine the specific QoS support for a module.

QoS Default Configuration

Table 14-1
Table 14-1 QoS Default Configuration
Feature
QoS global enable state
Switch CoS value
Transmit queue drop threshold percentages
CoS value-to-drop threshold mapping
CoS value-to-transmit queue mapping
1. Not user-configurable

Configuring QoS on the Switch

These sections describe how to configure QoS:
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•
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•
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Because entering some QoS commands disables and then reenables ports (which can cause spanning tree
Note
topology changes), enter QoS commands only when necessary.
Catalyst 4500 Series, Catalyst 2948G, Catalyst 2948G-GE-TX, and Catalyst 2980G Switches Software Configuration Guide—Release 8.2GLX
14-4
shows the QoS default configuration.
Enabling QoS Globally, page 14-5
Configuring the Default CoS Value for the Switch, page 14-5
Reverting to the Default Switch CoS Value, page 14-5
Mapping CoS Values to Transmit Queues and Drop Thresholds, page 14-6
Reverting to the Default CoS-to-Transmit Queue and Drop Threshold Mapping, page 14-6
Displaying QoS Information, page 14-7
Reverting to QoS Defaults, page 14-7
Disabling QoS, page 14-7
Default Value
Disabled
0
1
• Threshold 1:100%
Transmit queue drop threshold 1: CoS 0–7
•
• Transmit queue 1: CoS 0–7
• Transmit queue 2: None configured
Chapter 14 Configuring QoS
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