Cisco WS-SUP32-GE-3B - Supervisor Engine 32 Software Configuration Manual page 574

PFC QoS Configuration Guidelines and Restrictions
You cannot apply microflow policing to IPv6 multicast traffic.
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You cannot apply microflow policing to traffic that has been permitted by egress ACL support for
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remarked DSCP.
Traffic that has been permitted by egress ACL support for remarked DSCP cannot be tagged as
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MPLS traffic. (The traffic can be tagged as MPLS traffic on another network device.)
• When you apply both ingress policing and egress policing to the same traffic, both the input policy
and the output policy must either mark down traffic or drop traffic. PFC QoS does not support
ingress markdown with egress drop or ingress drop with egress markdown. (CSCea23571)
If traffic is both aggregate and microflow policed, then the aggregate and microflow policers must
•
both be in the same policy-map class and each must use the same conform-action and
exceed-action keyword option: drop, set-dscp-transmit, set-prec-transmit, or transmit.
You cannot configure PFC QoS features on tunnel interfaces.
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PFC QoS does not rewrite the payload ToS byte in tunnel traffic.
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PFC QoS filters only by ACLs, dscp values, or IP precedence values.
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For these commands, PFC QoS applies identical configuration to all LAN ports controlled by the
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same application-specific integrated circuit (ASIC):
Configure these commands only on physical ports. Do not configure these commands on logical
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interfaces:
Catalyst Supervisor Engine 32 PISA Cisco IOS Software Configuration Guide, Release 12.2ZY
38-40
rcv-queue random-detect
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rcv-queue queue-limit
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wrr-queue queue-limit
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wrr-queue bandwidth (except Gigabit Ethernet LAN ports)
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priority-queue cos-map
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– rcv-queue cos-map
– wrr-queue cos-map
– wrr-queue threshold
rcv-queue threshold
–
wrr-queue random-detect
–
wrr-queue random-detect min-threshold
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wrr-queue random-detect max-threshold
–
priority-queue cos-map
–
wrr-queue cos-map
–
wrr-queue random-detect
–
wrr-queue random-detect max-threshold
–
wrr-queue random-detect min-threshold
–
wrr-queue threshold
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wrr-queue queue-limit
–
wrr-queue bandwidth
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rcv-queue cos-map
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– rcv-queue bandwidth
Chapter 38 Configuring PFC QoS
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