HP Cisco MDS 9124 Cisco MDS 9000 Family Command Reference - Cisco MDS SAN-OS R - Page 652

ips netsim drop nth Chapter 11 I Commands Send documentation comments to [email protected] ips netsim drop nth To drop packets every nth packet at a specified Gigabit Ethernet interface, use the ips netsim drop nth command in SAN extension tuner configuration submode. ips netsim drop nth packet {burst burst-size ingress gigabitethernet slot/port | ingress gigabitethernet slot/port} Syntax Description nth packet burst burst-size ingress gigabitethernet slot/ port Specifies a specific packet to drop. The range is 0 to 10,000. Specifies the packet burst size. The range is 1 to 100. Specifies the ingress direction. Specifies the the slot and port number of the Gigabit Ethernet interface. Defaults Disabled. Command Modes SAN extension tuner configuration submode. Command History Release 3.1(1) Modification This command was introduced. Usage Guidelines To use this command, you must enable the IP Network Simulator using the ips netsim enable command. You can configure the IP Network Simulator to simulate packet drops (even when the queue is not full) randomly (specified as a percentage) or every Nth packet. Percentage is represented as the number of packets in 10,000. For example, if you want to drop one percent of packets, then specify it as 100 packets in 10,000. To simulate a realistic scenario for IP networks using random drops, the drop percentage should be between zero and one percent of packet drops in the specified traffic direction. If you use the optional burst parameter, then a specified number of packets are dropped. If you do not specify the burst parameter, then only one packet is dropped. The burst limit for either random or Nth drops is 1 to 100 packets. Take the burst parameter into account when specifying the percentage of packets dropped. For example, if you select a random drop of 100 packets in 10,000 (or one percent) with a burst of 2, 200 packets (or two percent) in every 10,000 packets are dropped. Specifying 2 for burst doubles the packet drop. Examples The following example shows how to configure an interface to drop every 100th packet, 2 packets at a time. switch# config terminal switch(config)# switch(config)# san-ext-tuner enable switch(config)# exit switch# switch# ips netsim drop nth 100 burst 2 ingress gigabitethernet 2/3 11-60 Cisco MDS 9000 Family Command Reference OL-16217-01, Cisco MDS SAN-OS Release 3.x