Specifications

1-6
System Management Software Configuration Guide for Cisco IE 2000U and Connected Grid Switches
Chapter 1 Overview
Features
Related Topics
Chapter 10, “Configuring CDP”
SPAN and RSPAN
You can analyze network traffic passing through ports or VLANs by using Switched Port Analyzer
(SPAN) and Remote SPAN (RSPAN) to send a copy of the traffic to another port on the switch or on
another switch that has been connected to a network analyzer or other monitoring or security device.
SPAN copies (or mirrors) traffic received or sent (or both) on source ports or source VLANs to a
destination port for analysis. SPAN does not affect the switching of network traffic on the source ports
or VLANs. You must dedicate the destination port for SPAN use. Except for traffic that is required for
the SPAN or RSPAN session, destination ports do not receive or forward traffic.
Related Topics
Chapter 11, “Configuring SPAN and RSPAN”
RMON
Remote Network Monitoring (RMON) is a standard monitoring specification that defines a set of
statistics and functions that can be exchanged between RMON-compliant console systems and network
probes. RMON provides you with comprehensive network-fault diagnosis, planning, and
performance-tuning information. You can use the RMON feature with the Simple Network Management
Protocol (SNMP) agent in the switch to monitor all the traffic flowing among switches on all connected
LAN segments.
Related Topics
Chapter 12, “Configuring RMON”
System Message Logging
By default, a switch sends the output from system messages and debug privileged EXEC commands to
a logging process. The logging process controls the distribution of logging messages to various
destinations, such as the logging buffer, terminal lines, or a UNIX syslog server, depending on your
configuration. The process also sends messages to the console. You can use system message logging in
the following ways:
• Set the severity level of the messages to control the type of messages displayed on the consoles and
each of the destinations.
• Time-stamp log messages or set the syslog source address to enhance real-time debugging and
management.
• Access logged system messages by using the switch command-line interface (CLI) or by saving
them to a properly configured syslog server. The switch software saves syslog messages in an
internal buffer.
• Remotely monitor system messages by viewing the logs on a syslog server or by accessing the
switch through Telnet or through the console port.