Chapter 42 Configuring PFC QoS

Configuring PFC QoS

Enabling VLAN-Based PFC QoS on Layer 2 LAN Ports

Note

• With a PFC2, PFC QoS does not support VLAN-based QoS with DFCs installed.

 

•

With a PFC3, PFC QoS supports VLAN-based QoS with DFC3s installed.

 

•

With a PFC3, you can attach policy maps to Layer 3 interfaces for application of PFC QoS to egress

 

 

traffic. VLAN-based or port-based PFC QoS on Layer 2 ports is not relevant to application of

 

 

PFC QoS to egress traffic on Layer 3 interfaces.

 

 

 

By default, PFC QoS uses policy maps attached to LAN ports. For ports configured as Layer 2 LAN ports with the switchport keyword, you can configure PFC QoS to use policy maps attached to a VLAN. Ports not configured with the switchport keyword are not associated with a VLAN.

To enable VLAN-based PFC QoS on a Layer 2 LAN port, perform this task:

 

Command

Purpose

Step 1

 

 

Router(config)# interface {{type1 slot/port}

Selects the interface to configure.

 

{port-channel number}}

 

Step 2

 

 

Router(config-if)# mls qos vlan-based

Enables VLAN-based PFC QoS on a Layer 2 LAN port or

 

 

a Layer 2 EtherChannel.

 

Router(config-if)#no mls qos vlan-based

Disables VLAN-based PFC QoS.

Step 3

 

 

Router(config-if)# end

Exits configuration mode.

Step 4

 

 

Router# show mls qos

Verifies the configuration.

 

 

 

1.type = ethernet, fastethernet, gigabitethernet, or tengigabitethernet

This example shows how to enable VLAN-based PFC QoS on Fast Ethernet port 5/42:

Router# configure terminal

Enter configuration commands, one per line. End with CNTL/Z.

Router(config)# interface fastethernet 5/42

Router(config-if)# mls qos vlan-based

Router(config-if)# end

This example shows how to verify the configuration:

Router# show mls qos begin QoS is vlan-based

QoS is vlan-based on the following interfaces: Fa5/42

<...Output Truncated...>

Note Configuring a Layer 2 LAN The no mls qos vlan-based

port for VLAN-based PFC QoS preserves the policy map port configuration. port command reenables any previously configured port commands.

 

Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX

42-60

OL-4266-08

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Cisco Systems OL-4266-08 manual Enabling VLAN-Based PFC QoS on Layer 2 LAN Ports, 42-60
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