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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 Processed in . . .? Applied on Ingress or Egress Supported PFC
Port Trust
Line-card port ASIC Ingress –
Default CoS Assignment
Line-card port ASIC Ingress –
CoS to DSCP Map
Line-card port ASIC Ingress –
IP Precedence to DSCP Map
Line-card port ASIC Ingress –
CoS Mutation
Line-card port ASIC Ingress –
Ingress Classification
PFC Ingress PFC1, 2, 3A, 3B, 3BXL
Ingress Aggregate Policing
PFC Ingress PFC1, 2, 3A, 3B, 3BXL
Egress Classification
PFC Egress PFC3A, 3B, 3BXL
Egress Aggregate Policing
PFC Egress PFC3A, 3B, 3BXL
Microflow Policing
PFC Ingress PFC1, 2, 3A, 3B, 3BXL
UBRL
PFC Ingress PFC3A, 3B, 3BXL
DSCP to CoS Map
Line-card port ASIC Egress –
Egress DSCP Mutation
PFC Egress PFC3A, 3B, 3BXL
WRR
Line-card port ASIC Egress –
DWRR
Line-card port ASIC Egress –
SRR
Line-card port ASIC Egress –
Strict Priority Queuing
Line-card port ASIC Egress –
Tail Drop
Line-card port ASIC Egress –
WRED
Line-card port ASIC Egress –
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