26-81
Catalyst 3750 Metro Switch Software Configuration Guide
78-15870-01
Chapter 26 Configuring QoS
Configuring Hierarchical QoS
Step 4
police cir cir [bc conform-burst] pir pir
[be peak-burst] [conform-action action
[exceed-action action [violate-action
action]]]
or
police cir percent percent [bc
conform-burst ms] | pir percent percent
[be peak-burst ms] [conform-action
action [exceed-action action
[violate-action action]]]
Note For the syntax description of the
police cir percent command, refer
to the command reference for this
release.
Configure an egress traffic policer that uses two rates, the CIR and the
peak information rate PIR. By default, no policer is defined.
• For cir cir, specify the CIR at which the first token bucket is
updated. The range is 64000 to 990000000 bps.
• (Optional) For bc conform-burst, specify the conform burst size
used by the first token bucket for policing. The range is 1536 to
16776960 bytes. The default is 8192.
• For pir pir, specify the PIR at which the second token bucket for
policing is updated. The range is 64000 to 990000000 bps.
• (Optional) For be peak-burst, specify the peak burst size used by
the second token bucket. The range is 1536 to 16776960 bytes. The
default is 8192.
• (Optional) For conform-action, specify the action to perform on
packets that conform to the CIR and PIR.
• (Optional) For exceed-action, specify the action to perform on
packets that conform to the PIR but not the CIR.
• (Optional) For violate-action, specify the action to perform on
packets that exceed the PIR.
Note If you do not specify an action, the default conform-action is
transmit, the default exceed-action is drop, and the default
violate-action is drop.
• (Optional) For action, specify the action to perform on packets:
–
drop—drop the packet.
–
set-cos-transmit new-cos—set the CoS value to a new value,
and send the packet. The range is 0 to 7.
–
set-dscp-transmit new-dscp—set the IP DSCP value to a new
value, and send the packet. The range is 0 to 63. You also can
enter a mnemonic name for a commonly used value.
–
set-mpls-exp-transmit new-exp—set the MPLS EXP bits,
and send the packet. The range is 0 to 7.
–
set-prec-transmit new-prec—set the IP precedence value to a
new value, and send the packet. The range is 0 to 7.
–
transmit—send the packet without altering it.
If you set the CIR equal to the PIR, a traffic rate that is less than the
CIR or that meets the CIR is in the conform range. Traffic that exceeds
the CIR rate is in the violate range.
If you set the PIR greater than the CIR, a traffic rate less than the CIR
is in the conform range. A traffic rate that exceeds the CIR but is less
than or equal to the PIR is in the exceed range. A traffic rate that
exceeds the PIR is in the violate range.
Setting the burst sizes too low can result in less traffic than expected,
and setting them too high can result in more traffic than expected.
Step 5
exit Return to policy-map configuration mode.
Command Purpose
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