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Cisco AVVID Network Infrastructure Enterprise Quality of Service Design
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Chapter 3 QoS in an AVVID-Enabled Campus Network
Selecting an Access-Layer Switch
Verifying the Configuration
One of the fundamental processes of implementing QoS is verifying that the configurations are correct
and are performing as expected. On the Catalyst 6500 access-layer switch, you can verify the
configuration and performance during periods of high congestion by examining the output of the
following commands:
Example 3-1
Displaying QoS Settings for a Port
cat6k-access> (enable) show port qos 5/1
QoS is enabled for the switch
QoS policy source for the switch set to local.
Port Interface Type Interface Type Policy Source Policy Source
config runtime config runtime
----- -------------- -------------- ------------- -------------
5/1 vlan-based vlan-based COPS local
Port TxPort Type RxPort Type Trust Type Trust Type Def CoS Def CoS
config runtime config runtime
----- ------------ ------------ ------------ ------------- ------- -------
5/1 2q2t 1q4t trust-cos trust-cos* 0 0
Port Ext-Trust Ext-Cos
----- --------- -------
5/1 untrusted 0
(*)Runtime trust type set to untrusted.
Config:
Port ACL name Type
----- -------------------------------- ----
No ACL is mapped to port 5/1.
ACL is mapped to VLAN
Runtime:
Port ACL name Type
----- -------------------------------- ----
No ACL is mapped to port 5/1.
Command
Description
See
show port qos mod/port
Displays the QoS settings for the specified
port.
show qos info runtime mod/port
Displays QoS runtime information for the
specified port.
show mac mod/port
Displays Media Access Control TX ringMAC)
information for the specified port.
show qos statistics l3
Displays summary QoS statistics for all ports.
show qos stat mod/port
Displays detailed QoS statistics for the
specified port.
show qos map run cos-dscp-map
Displays the CoS-to-DSCP mappings.
show qos map run
ipprec-dscp-map
Displays the IP Precedence-to-DSCP
mappings.