Configuring The Trust State Of Ethernet Lan And Osm Ingress Ports - Cisco 6500 Series Software Configuration Manual

Chapter 31 Configuring PFC QoS
Configuring a Layer 2 LAN port for VLAN-based PFC QoS preserves the policy map port configuration.
Note
The no mls qos vlan-based port command reenables any previously configured port commands.

Configuring the Trust State of Ethernet LAN and OSM Ingress Ports

By default, all ingress ports are untrusted. You can configure the ingress port trust state on all Ethernet
LAN ports except non-Gigabit Ethernet 1q4t/2q2t ports (see the
on page
Features" section on page
To configure the trust state of an ingress port, perform this task:
Command
Step 1
Router(config)# interface {{type
{port-channel number}}
Step 2
Router(config-if)# mls qos trust [dscp |
ip-precedence | cos
Router(config-if)# no mls qos trust
Step 3
Router(config-if)# end
Step 4
Router# show mls qos
1. type = ethernet, fastethernet, gigabitethernet, tengigabitethernet, ge-wan, pos, or atm.
2. Not supported for pos or atm interface types.
When configuring the trust state of an ingress port, note the following:
•
•
•
This example shows how to configure Gigabit Ethernet port 1/1 with the trust cos keywords:
Router# configure terminal
Enter configuration commands, one per line.
Router(config)# interface gigabitethernet 1/1
Router(config-if)# mls qos trust cos
Router(config-if)# end
Router#
This example shows how to verify the configuration:
Router# show queueing interface gigabitethernet 1/1 | include trust
Trust state: trust COS
Router#
78-14099-04
31-12). You can configure the ingress port trust state on OSM ports (see the
31-11).
1
slot/port} |
2
]
With no other keywords, the mls qos trust command is equivalent to mls qos trust dscp.
The mls qos trust cos command enables receive-queue drop thresholds. To avoid dropping traffic
because of inconsistent CoS values, configure ports with the mls qos trust cos command only when
the received traffic is ISL or 802.1Q frames carrying CoS values that you know to be consistent with
network policy.
Use the no mls qos trust command to set the port state to untrusted.
Catalyst 6500 Series Switch Cisco IOS Software Configuration Guide—Release 12.1 E
"Ingress LAN Port Features" section
Purpose
Selects the interface to configure.
Configures the trust state of the port.
Reverts to the default trust state (untrusted).
Exits configuration mode.
Verifies the configuration.
End with CNTL/Z.
Configuring PFC QoS
"Ingress OSM Port
31-53