Cisco WS-C3560E-48PD-SF Command Reference - Page 333

Chapter 2 Catalyst 3560 Switch Cisco IOS Commands police police Use the police policy-map class configuration command to define a policer for classified traffic. A policer defines a maximum permissible rate of transmission, a maximum burst size for transmissions, and an action to take if either maximum is exceeded. Use the no form of this command to remove an existing policer. police rate-bps burst-byte [exceed-action {drop | policed-dscp-transmit}] no police rate-bps burst-byte [exceed-action {drop | policed-dscp-transmit}] Syntax Description rate-bps burst-byte exceed-action drop exceed-action policed-dscp-transmit Specify the average traffic rate in bits per second (bps). The range is 1000000 to 1000000000. Specify the normal burst size in bytes. The range is 8000 to 1000000. (Optional) When the specified rate is exceeded, specify that the switch drop the packet. (Optional) When the specified rate is exceeded, specify that the switch changes the Differentiated Services Code Point (DSCP) of the packet to that specified in the policed-DSCP map and then sends the packet. Defaults No policers are defined. Command Modes Policy-map class configuration Command History Release 12.1(19)EA1 Modification This command was introduced. Usage Guidelines When configuring hierarchical policy maps, you can only use the police policy-map command in a secondary interface-level policy map. The port ASIC device, which controls more than one physical port, supports 256 policers (255 policers plus 1 no policer). The maximum number of policers supported per port is 64. Policers are allocated on demand by the software and are constrained by the hardware and ASIC boundaries. You cannot reserve policers per port. There is no guarantee that a port will be assigned to any policer. To return to policy-map configuration mode, use the exit command. To return to privileged EXEC mode, use the end command. Policing uses a token-bucket algorithm. You configure the bucket depth (the maximum burst that is tolerated before the bucket overflows) by using the burst-byte option of the police policy-map class configuration command or the mls qos aggregate-policer global configuration command. You configure how quickly (the average rate) the tokens are removed from the bucket by using the rate-bps option of the police policy-map class configuration command or the mls qos aggregate-policer global configuration command. For more information, see the software configuration guide for this release. 78-16405-05 Catalyst 3560 Switch Command Reference 2-301