Cisco WS-C3560E-48PD-SF Command Reference - Page 648

storm-control Chapter 2 Catalyst 3560 Switch Cisco IOS Commands level pps pps [pps-low] action {shutdown | trap} Specify the rising and falling suppression levels as a rate in packets per second at which traffic is received on the port. • pps-Rising suppression level, up to 1 decimal place. The range is 0.0 to 10000000000.0. Block the flooding of storm packets when the value specified for pps is reached. • pps-low-(Optional) Falling suppression level, up to 1 decimal place. The range is 0.0 to 10000000000.0. This value must be equal to or less than the rising suppression value. You can use metric suffixes such as k, m, and g for large number thresholds. Action taken when a storm occurs on a port. The default action is to filter traffic and to not send an Simple Network Management Protocol (SNMP) trap. The keywords have these meanings: • shutdown-Disables the port during a storm. • trap-Sends an SNMP trap when a storm occurs. Defaults Broadcast, multicast, and unicast storm control are disabled. The default action is to filter traffic and to not send an SNMP trap. Command Modes Interface configuration Command History Release 12.1(19)EA1 12.2(25)SE Modification This command was introduced. The level level [.level] options were replaced with the level {level [level-low] | pps pps [pps-low] | bps bps [bps-low]} action {shutdown | trap}} options. Usage Guidelines Storm control is supported only on physical interfaces. It is not supported on EtherChannel port channels, even though it is available in the command-line interface (CLI). The storm-control suppression level can be entered as a percentage of total bandwidth of the port, as a rate in packets per second at which traffic is received, or as a rate in bits per second at which traffic is received. When specified as a percentage of total bandwidth, a suppression value of 100 percent means that no limit is placed on the specified traffic type. A value of level 0 0 means that all broadcast, multicast, or unicast traffic on that port is blocked. Storm control is enabled only when the rising suppression level is less than 100 percent. If no other storm-control configuration is specified, the default action is to filter the traffic causing the storm and to send no SNMP traps. Note When the storm control threshold for multicast traffic is reached, all multicast traffic except control traffic, such as bridge protocol data unit (BDPU) and Cisco Discovery Protocol (CDP) frames, are blocked. However, the switch does not differentiate between routing updates, such as Open Shortest Path First (OSPF) and regular multicast data traffic, so both types of traffic are blocked. 2-616 Catalyst 3560 Switch Command Reference 78-16405-05