Enabling Ignore Port Trust; Configuring Dscp Transparency - Cisco WS-SUP32-GE-3B - Supervisor Engine 32 Software Configuration Manual

Configuring PFC QoS
This example shows how to verify the configuration:
Router# show mls qos
QoS is enabled globally
Microflow QoS is enabled globally
QoS global counters:
Router#

Enabling Ignore Port Trust

The ignore port trust feature allows an ingress policy to apply a configured IP precedence or DSCP value
to any traffic, rather than only to untrusted traffic.
To enable ignore port trust, perform this task:
Command
Step 1
Router(config)# mls qos marking ignore port-trust
Router(config)# no mls qos marking ignore port-trust
Step 2
Router(config)# end
Step 3
Router# show mls qos | include ignores
For untrusted traffic, when ignore port trust is enabled, PFC QoS does the following:
Note
•
•
This example shows how to enable ignore port trust and verify the configuration:
Router# configure terminal
Router(config)# mls qos marking ignore port-trust
Router(config)# end
Router# show mls qos | include ignores
Policy marking ignores port_trust
Router#

Configuring DSCP Transparency

In addition to support for other IP traffic, the PFC3B supports the no mls qos rewrite ip dscp command
Note
for MPLS traffic, traffic in IP in IP tunnels, and traffic in GRE tunnels.
Catalyst Supervisor Engine 32 PISA Cisco IOS Software Configuration Guide, Release 12.2ZY
38-46
Total packets: 544393
IP shortcut packets: 1410
Packets dropped by policing: 0
IP packets with TOS changed by policing: 467
IP packets with COS changed by policing: 59998
Non-IP packets with COS changed by policing: 0
For IP traffic, PFC QoS uses the received DSCP value as the initial internal DSCP value.
For traffic without a recognizable ToS byte, PFC QoS maps the port CoS value to the initial internal
DSCP value.
Chapter 38
Purpose
Enables ignore port trust globally on the switch.
Disables ignore port trust globally on the switch
(default).
Exits configuration mode.
Verifies the configuration.
Configuring PFC QoS
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