Configuring The Ingress Lan Port Cos Value; Configuring Standard-Queue Drop Threshold Percentages - Cisco 6500 Series Software Configuration Manual

Configuring PFC QoS

Configuring the Ingress LAN Port CoS Value

Whether or not PFC QoS uses the CoS value applied with the mls qos cos command depends on the trust
Note
state of the port and the trust state of the traffic received through the port. The mls qos cos command
does not configure the trust state of the port or the trust state of the traffic received through the port.
To use the CoS value applied with the mls qos cos command as the basis of internal DSCP (see the
"Internal DSCP Values" section on page
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You can configure the CoS value that PFC QoS assigns to untagged frames from ingress LAN ports
configured as trusted and to all frames from ingress LAN ports configured as untrusted.
To configure the CoS value for an ingress LAN port, perform this task:
Command
Step 1
Router(config)# interface {{type
{port-channel number}}
Step 2
Router(config-if)# mls qos cos default_cos
Router(config-if)# no mls qos cos default_cos
Step 3
Router(config-if)# end
Step 4
Router# show queueing interface {ethernet |
fastethernet | gigabitethernet} slot/port
1. type = ethernet, fastethernet, gigabitethernet, or tengigabitethernet
This example shows how to configure the CoS 5 as the default on Fast Ethernet port 5/24 and verify the
configuration:
Router# configure terminal
Enter configuration commands, one per line.
Router(config)# interface fastethernet 5/24
Router(config-if)# mls qos cos 5
Router(config-if)# end
Router# show queueing interface fastethernet 5/24 | include Default COS
Default COS is 5
Router#

Configuring Standard-Queue Drop Threshold Percentages

These sections describe configuring standard-queue drop threshold percentages:
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Catalyst 6500 Series Switch Cisco IOS Software Configuration Guide—Release 12.1 E
31-54
On a port that receives only untagged ingress traffic, configure the ingress port as trusted or
configure a trust-CoS policy map that matches the ingress traffic.
On a port that receives tagged ingress traffic, configure a trust-CoS policy map that matches the
ingress traffic.
1
slot/port} |
Configuring a Tail-Drop Receive Queue, page 31-55
Configuring a WRED-Drop Transmit Queue, page 31-56
Configuring a WRED-Drop and Tail-Drop Transmit Queue, page 31-57
Configuring 1q4t/2q2t Tail-Drop Threshold Percentages, page 31-58
31-17):
Purpose
Selects the interface to configure.
Configures the ingress LAN port CoS value.
Reverts to the default port CoS value.
Exits configuration mode.
Verifies the configuration.
End with CNTL/Z.
Chapter 31 Configuring PFC QoS
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