Restrictions - Cisco 6500 Series Software Configuration Manual

PFC QoS Configuration Guidelines and Restrictions
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CIR and PIR Token Bucket Size Range Granularity
1 to 32768
32769 to 65536
65537 to 131072
131073 to 262144
262145 to 524288
524289 to 1048576
1048577 to 2097152
2097153 to 4194304
4194305 to 8388608
8388609 to 16777216
16777217 to 33554432
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Restrictions

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Catalyst 6500 Series Switch Cisco IOS Software Configuration Guide—Release 12.1 E
31-32
Within each range, PFC QoS programs the PFC hardware with rate values that are multiples of the
granularity values.
PFC QoS has the following hardware granularity for CIR and PIR token bucket (burst) sizes:
(32 KB) 1024
(64 KB) 2048
(128 KB) 4096
(256 KB) 8196
(512 KB) 16392
(1 MB) 32768
(2 MB) 65536
(4 MB) 131072
(8 MB) 262144
(16 MB) 524288
(32 MB) 1048576
Within each range, PFC QoS programs the PFC hardware with token bucket sizes that are multiples
of the granularity values.
For these commands, PFC QoS applies identical configuration to all LAN ports controlled by the
same application-specific integrated circuit (ASIC) or group of ASICs (see the port group
information for each module in the Release Notes):
rcv-queue queue-limit
–
wrr-queue queue-limit
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– wrr-queue bandwidth (except Gigabit Ethernet LAN ports)
priority-queue cos-map
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– rcv-queue cos-map
wrr-queue cos-map
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wrr-queue threshold
–
rcv-queue threshold
–
wrr-queue random-detect
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– wrr-queue random-detect min-threshold
wrr-queue random-detect max-threshold
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PFC QoS filters only by access lists, dscp values, or IP precedence values.
PFC QoS does not support the following commands and configurations:
match cos, match any, match classmap, match destination-address, match input-interface,
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match mpls, match qos-group, or match source-address class map commands
class maps that contain multiple match commands
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Chapter 31
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Configuring PFC QoS
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