Cisco Catalyst 3550 series Software Configuration Manual page 632

Configuring Standard QoS
Command
Step 10 police rate-bps burst-byte [exceed-action
{drop | policed-dscp-transmit}]
Step 11
exit
Step 12
exit
Step 13 interface interface-id
Step 14
service-policy {input policy-map-name |
output policy-map-name}
Catalyst 3550 Multilayer Switch Software Configuration Guide
29-46
Purpose
Define a policer for the classified traffic.
You can configure up to 128 policers on ingress Gigabit-capable
Ethernet ports, up to 8 policers on ingress 10/100 Ethernet ports, and
up to 8 policers on egress ports.
• For rate-bps, specify average traffic rate in bits per second (bps).
The range is 8000 to 2000000000.
For burst-byte, specify the normal burst size in bytes. The range is
•
8000 to 512000000.
Although the command-line help strings show a large range of
Note
values, the rate-bps option cannot exceed the configured port
speed, and the burst-byte option cannot exceed 2000000 bytes.
If you enter a larger value, the switch rejects the policy map
when you attach it to an interface.
(Optional) Specify the action to take when the rates are exceeded.
•
Use the exceed-action drop keywords to drop the packet. Use the
exceed-action policed-dscp-transmit keywords to mark down the
DSCP value (by using the policed-DSCP map) and send the packet.
For more information, see the
Map" section on page
Return to policy map configuration mode.
Return to global configuration mode.
Enter interface configuration mode, and specify the interface to attach
to the policy map.
Valid interfaces include physical interfaces.
Apply a policy map to the input or output of a particular interface.
Only one policy map per interface per direction is supported.
• Use input policy-map-name to apply the specified policy-map to
the input of an interface.
• Use output policy-map-name to apply the specified policy-map to
the output of an interface.
You cannot use the service-policy interface configuration command to
attach policy maps that contain these elements to an egress interface:
• set or trust policy-map class configuration commands. Instead,
you can use the police policy-map class configuration command to
mark down (reduce) the DSCP value at the egress interface.
• Access control list (ACL) classification.
• Per-port per-VLAN classification.
The only match criterion in a policy map that can be attached to an
egress interface is the match ip dscp dscp-list class-map configuration
command.
Per-port per-VLAN policing is not supported on routed ports or on
virtual (logical) interfaces.
Chapter 29
"Configuring the Policed-DSCP
29-53.
Configuring QoS
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