Dell PowerConnect 8024 User's Guide - Page 245

• Log - The sequence number of this trap. • System Up Time - The time at which this trap occurred, expressed in days, hours, minutes and seconds since the last reboot of the switch. • Trap - Information associated with the trap. View the Trap Log Using CLI Commands For information about the CLI commands that perform this function, see the Syslog Commands chapter in the CLI Reference Guide. The following table shows the equivalent CLI command you use to show trap logs. Table 6-57. Trap Log Commands CLI Command show logging Description Displays the state of logging and the syslog messages stored in the internal buffer. sFlow sFlow® is the standard for monitoring high-speed switched and routed networks. sFlow technology is built into network equipment and gives complete visibility into network activity, enabling effective management and control of network resources. The sFlow monitoring system consists of an sFlow Agent (embedded in a switch or router or in a standalone probe) and a central sFlow Collector. The sFlow Agent uses sampling technology to capture traffic statistics from the device it is monitoring. sFlow datagrams are used to immediately forward the sampled traffic statistics to an sFlow Collector for analysis. The sFlow Agent uses two forms of sampling: statistical packet-based sampling of switched or routed Packet Flows, and time-based sampling of counters. Advantages of using sFlow include the following: • It is possible to monitor all ports of the switch continuously with no impact on the distributed switching performance. • Very little memory/CPU is required. Samples are not aggregated into a flow-table on the switch; they are forwarded immediately over the network to the sFlow collector. • The system is tolerant to packet loss in the network (statistical model means loss is equivalent to slight change in sampling rate). • The sFlow collector can receive data from multiple switches, providing a real-time synchronized view of the whole network. • The collector can analyze traffic patterns for whatever protocols are found in the headers (e.g. TCP/IP, IPX, Ethernet, AppleTalk...), which means there is no need for a layer 2 switch to decode and understand all protocols. Configuring System Information 245