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Cisco7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
OL-4266-08
Chapter42 Configuring PFC QoS
Configuring PFCQo S
•The valid range of values for the pir bits_per_second parameter is as follows:
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Minimum—32 kilobits per second, entered as 32000 (the value cannot be smaller than the
CIR bits_per_second parameters)
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Maximum with Release 12.2(18)SXE and later releases:
10 gigabits per second, entered as 10000000000
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Maximum with releases earlier than Release 12.2(18)SXE:
4 gigabits per second, entered as 4000000000
•(Optional) You can specify a conform action for matched in-profile traffic as follows:
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The default conform action is transmit, which sets the policy map class trust state to trust
DSCP unless the policy map class contains a trust command.
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To set PFCQoS labels in untrusted traffic, enter the set-dscp-transmit keyword to mark
matched untrusted traffic with a new DSCP value or enter the set-prec-transmit keyword to
mark matched untrusted traffic with a new IP precedence value. The set-dscp-transmit and
set-prec-transmit keywords are only supported for IP traffic. PFCQoS sets egress ToS and
CoS from the configured value.
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Enter the drop keyword to drop all matched traffic.
Note When you configure drop as the conform action, PFC QoS configures drop as the exceed
action and the violate action.
•(Optional) For traffic that exceeds the CIR, you can specify an exceed action as follows:
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The default exceed action is drop, except with a maximum_burst_bytes parameter (drop is not
supported with a maximum_burst_bytes parameter).
Note When the exceed action is drop, PFC QoS ignores any configured violate action.
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Enter the policed-dscp-transmit keyword to cause all matched out-of-profile traffic to be
marked down as specified in the markdown map.
Note When you create a policer that does not use the pir keyword and the maximum_burst_bytes
parameter is equal to the normal_burst_bytes parameter (which is the case if you do not enter
the maximum_burst_bytes parameter), the exceed-action policed-dscp-transmit keywords
cause PFC QoS to mark traffic down as defined by the policed-dscp max-burst markdown
map.
•(Optional) For traffic that exceeds the PIR, you can specify a violate action as follows:
–
To mark traffic without policing, enter the transmit keyword to transmit all matched
out-of-profile traffic.
–
The default violate action is equal to the exceed action.
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Enter the policed-dscp-transmit keyword to cause all matched out-of-profile traffic to be
marked down as specified in the markdown map.
–
For marking without policing, enter the transmit keyword to transmit all matched out-of-profile
traffic.