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COMPARISON OF QoS FEATURES BETWEEN PFC VERSIONS
Over the years a number of different PFC versions have been released. Table 4 provides a high-level overview of the major differences between
the QoS capabilities of each PFC.
Table 4. Major Differences Between PFC QoS Capabilities
Feature PFC1 PFC2 PFC3A PFC3B PFC3BXL
ACL Classification
Yes Yes Yes Yes Yes
Microflow Policing
Yes Yes Yes Yes Yes
Ingress Aggregate Policing
Yes Yes Yes Yes Yes
Egress Aggregate Policing
Yes Yes Yes
UBRL
Yes Yes Yes
Egress DSCP Mutation
Yes Yes Yes
Ingress CoS Mutation
Yes Yes Yes
Number of QoS ACLs
16 K 32 K 32 K 32 K 32 K
Number of QoS Masks
2 K 4 K 4 K 4 K 4 K
Number of QoS Labels
512 512 512 4096 4096
SUMMARY
With the continued convergence of multiple technologies on IP networks, QoS is becoming more important in the successful operation of customer
networks. As a collection of technologies, distinct QoS features can be applied in different combinations to solve an assortment of problems in
a network. The richness of the QoS feature set on the Cisco Catalyst 6500 provides network managers with a means to facilitate convergence and
prioritize mission-critical application data. More importantly, the nature of the Cisco Catalyst 6500 platform means that incremental changes in
QoS features can be accommodated, allowing the platform to grow to meet the new demands of the networks of the future.
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