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Auto-QoS is applied in two steps. The first step is to enable it at a system level. This sets in place a series of defaults, which will become active

when a given port has auto-QoS applied. For each port that has an attached Cisco IP Phone, an auto-QoS macro is applied that sets in place a number

of port-specific QoS settings specific for the device telephony type. At the time of writing, there are two auto-QoS macros that can be applied to

a switch port. The ciscoiphone macro is used when a physical Cisco IP Phone is connected to the switch port. The other macro is ciscosoftphone,

which is used when a user attaches a PC to a switch port to run the software version of the IP telephone.

QoS FEATURE SUMMARY

Table 2 provides a summary of the QoS features found in the Cisco Catalyst 6500, where the feature is processed, and if the feature is applied on

ingress or egress.

Table 2.

QoS Feature Summary

QoS Feature

Port Trust

Default CoS Assignment

CoS to DSCP Map

IP Precedence to DSCP Map

CoS Mutation

Ingress Classification

Ingress Aggregate Policing

Egress Classification

Egress Aggregate Policing

Microflow Policing

UBRL

DSCP to CoS Map

Egress DSCP Mutation

WRR

DWRR

SRR

Strict Priority Queuing

Tail Drop

WRED

Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com.

Processed in . . .?

Line-card port ASIC

PFC

Line-card port ASIC

PFC

Line-card port ASIC

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Applied on Ingress or Egress

Ingress

Egress

Ingress

Egress

Supported PFC

–

PFC1, 2, 3A, 3B, 3BXL

PFC3A, 3B, 3BXL

PFC1, 2, 3A, 3B, 3BXL

PFC3A, 3B, 3BXL

–

PFC3A, 3B, 3BXL

–