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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 a Distribution-Layer Switch
To verify the settings, issue the following commands:
cat6k-distrib> (enable) show qos acl map run ACL_IP-PHONES
ACL name Type Vlans
-------------------------------- ---- ---------------------------------
ACL_IP-PHONES IP 110,111,112
ACL name Type Ports
-------------------------------- ---- ---------------------------------
ACL_IP-PHONES IP
cat6k-distrib> (enable) show qos acl info run ACL_IP-PHONES
set qos acl IP ACL_IP-PHONES
----------------------------------------------
1. dscp 26 tcp any any range 2000 2002
2. dscp 26 tcp any any eq 1720
3. dscp 26 tcp any any range 11000 11999
4. dscp 26 udp any any eq 2427
5. trust-cos any
Step 3
Enable trust for DSCP values from adjacent Layer 3 access switches. Use port-based QoS on the
trunking port. Current 10/100 version 1 linecards must have trust-ipprec enabled even though the parser
returns an error.
cat6k-distrib> (enable) set port qos 9/1 port-based
cat6k-distrib> (enable) set port qos 9/1 trust trust-ipprec
Step 4
Create an access list that accepts incoming Layer 3 IP Precedence classification.
cat6k-distrib> (enable) set qos acl ip ACL_TRUST-WAN trust-ipprec any
Step 5
Write the ACL to hardware.
cat6k-distrib> (enable) commit qos acl ACL_TRUST-WAN
Step 6
Map the ACL_TRUST-WAN ACL to the port.
cat6k-distrib> (enable) set qos acl map ACL_TRUST-WAN 9/1
Verifying the Configuration
On the Catalyst 6500 distribution-layer switch (with Catalyst OS), you can verify the configuration by
examining the output of the following commands:
Command
Description
See
show qos map run
ipprec-dscp-map
Displays the QoS IP Precedence mapping
information.
show qos map run cos-dscp-map
Displays the QoS CoS mapping information.
show port qos
Displays the Qos settings for a specified port.