Table Of Contents
Making Changes with the Web Console
Using the Default Settings on the Web Console
Navigating in the Menu Console
Making Changes with the Menu Console
Using the Default Settings on the Menu Console
Accessing MIB and Trap Information
Using FTP to Access the MIB Files
Using CCO to Access the MIB Files
Using SNMP to Access MIB Variables
Switch Configuration Overview
This chapter provides an overview of the configuration and monitoring options supported by the Catalyst 1900 switch. Topics covered in this chapter are the following:
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Overview of the web console, including a list of the default configuration settings. Details are in the "" chapter.
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Overview of the Web Console
The web console is a graphical user interface (GUI) for changing the switch configuration and monitoring network conditions and statistics. The web console is an embedded HTML web site in Flash memory. Online help is available on all pages.
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Accessing the Web Console
The switch must have an IP address before you can access the web console. See the "Assigning IP Information to the Switch" section.
To access the web console, follow these steps:
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The home page of the web console, (shown in Figure 3-1), is displayed.
Figure 3-1 Basic System Configuration Page
You now can continue to configure or monitor the switch from the web console, as described in the "" chapter.
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Navigating in the Web Console
You can use the action bar at the top of each page to move between pages. Figure 3-2 lists the functions for each action bar section.
Figure 3-2 Web Console Action Bar
Making Changes with the Web Console
Web console pages function much like other GUIs. A web console page displays the current settings for the switch. You then change the switch settings by entering information into fields, adding and removing list items, or selecting check boxes.
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After clicking Apply, you will not be able to revert to the previous settings.
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You can restrict access to the menu console by using a password and locking out a user who fails to enter the password within a set number of attempts. The network administrator can then be alerted by in-band management messages. For information about setting the password, see the "Basic System Configuration Page" section.
Using the Default Settings on the Web Console
The switch is designed to operate with little or no user intervention. In most cases, you can start using the switch with its default settings as soon as you assign an IP address to the switch.
Default values are defined for all switch features, and the switch begins forwarding packets as soon as it is powered up and connected to compatible devices. shows the default values and the web console pages you use to change them.
Overview of the Menu Console
The menu console is a menu-driven interface for configuring and monitoring network conditions and statistics. You can use the menu console even when the network is down because the console bypasses the network and communicates directly with the switch.
Accessing the Menu Console
To access the menu console, follow these steps:
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After you connect through the console port or through a Telnet session, the is displayed (shown in Figure 3-3) on the console.
Figure 3-3 Menu Console Logon Screen
Catalyst 1900 Management ConsoleCopyright (c) Cisco Systems, Inc. 1993-1998All rights reserved.Standard Edition SoftwareEthernet address: 00-E0-1E-7E-B4-40PCA Number: 73-2239-01PCA Serial Number: SAD01200001Model Number: WS-C1924-ASystem Serial Number: FAA01200001-------------------------------------------------User Interface Menu[M] Menus[I] IP ConfigurationEnter Selection:Step 2
Figure 3-4 Management Console Main Menu
Catalyst 1900 - Main Menu[C] Console Settings[S] System[N] Network Management[P] Port Configuration[A] Port Addressing[D] Port Statistics Detail[M] Monitoring[B] Bridge Group[R] Multicast Registration[F] Firmware[I] RS-232 Interface[U] Usage Summaries[H] Help[X] Exit Management ConsoleEnter Selection:You now can continue to configure or monitor the switch from the menu console, as described in the "" chapter.
Navigating in the Menu Console
lists the menus that are available from the Main Menu of the menu console.
Figure 3-5 Menu Console Menus and Displays
Making Changes with the Menu Console
When you use the menu console, keep the following in mind:
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In addition, when the cursor is at the beginning of an entry, pressing the Backspace key clears the entry.
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Using the Default Settings on the Menu Console
The switch is designed to operate with little or no user intervention. In most cases, you can start using the switch with its default settings as soon as you assign an IP address to the switch.
Default values are defined for all switch features, and the switch begins forwarding packets as soon as it is powered up and connected to compatible devices. shows the default values and the web console pages you use to change them.
In-Band Management
You can configure and manage the switch by accessing the MIB objects through in-band management. This section provides the following information about in-band management through Simple Network Management Protocol (SNMP).
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Accessing MIB and Trap Information
These MIB files contain variables that can be set or read to provide information about the switch and the traps generated by the switch.
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The switch is shipped with a DOS diskette containing the switch firmware and device-specific MIBs. You can also obtain a copy of the MIB files in the following ways:
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Using FTP to Access the MIB Files
To obtain a MIB file, follow these steps:
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Using CCO to Access the MIB Files
To access the MIB files from CCO, click Software & Support to display the Software Center site.
CCO serves a wide variety of users through two interfaces that are updated and enhanced simultaneously: a character-based version and a multimedia version that resides on the World Wide Web (WWW). The character-based CCO supports Zmodem, Kermit, Xmodem, FTP, and Internet e-mail, and it is excellent for quick access to information over lower bandwidths. The WWW version of CCO provides richly formatted documents with photographs, figures, graphics, and video, as well as hyperlinks to related information.
You can access CCO in the following ways:
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For a copy of CCO's Frequently Asked Questions (FAQ), contact cco-help@cisco.com. For additional information, contact cco-team@cisco.com.
Using SNMP to Access MIB Variables
The switch MIB variables are accessible through SNMP, an application-layer protocol facilitating the exchange of management information between network devices. The SNMP system consists of three parts: SNMP manager, SNMP agent, and MIB.
SNMP places all operations in a get-request, get-next-request, and set-request format. For example, an SNMP manager can get a value from an SNMP agent or store a value into that SNMP agent. The SNMP manager can be part of a network management system (NMS), and the SNMP agent can reside on a networking device such as a switch. You can compile the switch MIB files with your network management software. The SNMP agent can respond to MIB-related queries being sent by the NMS.
An example of an NMS is the CiscoWorks network management software. CiscoWorks uses the switch MIB variables to set device variables and to poll devices on the network for specific information. The results of a poll can be displayed as a graph and analyzed in order to troubleshoot internetworking problems, increase network performance, verify the configuration of devices, monitor traffic loads, and more.
Figure 3-6 shows how the SNMP agent gathers data from the MIB, which holds information about device parameters and network data. The agent can send traps, or notification of certain events, to the manager.
Figure 3-6 SNMP Network
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The SNMP manager uses information in the MIB to perform the operations described in .
Table 3-3 SNMP Manager Operations
get-request
Retrieves a value from a specific variable.
get-next-request
Retrieves a value from a variable within a table.1
get-response
Reply to a get-request, get-next-request, and set-request sent by an NMS.
set-request
Store a value in a specific variable.
trap
Send an unsolicited message from an SNMP agent to an SNMP manager indicating that some event has occurred.
1 An SNMP manager does not need to know the exact variable name. It sequentially searches to find the needed variable from within a table.
Remote Monitoring (RMON)
Remote Monitoring (RMON) is a standard monitoring specification that allows various network monitors and console systems to exchange network monitoring data. The switches provide support for the RMON of all ports. RMON provides you with visibility into network activity. You can access and remotely monitor the RMON specification RFC-1757 groupings of statistics, historical information, alarms, and events for any port through SNMP or through management applications, such as TrafficDirector.
RMON is enabled by default and is not displayed on the console. The switches support the statistics, history, alarm, and event groups.
The RMON feature monitors network traffic at the link layer of the OSI model without requiring a dedicated monitoring probe or network analyzer. You can analyze network traffic patterns, set up proactive alarms to detect problems before they affect users, identify heavy network users as candidates to move to dedicated or higher speed ports, and do trend analysis for long-term planning.
The switches support the following four RMON groups:
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The statistics group of the RMON specification maintains utilization and error statistics for the monitored switch. Statistics include information about collisions, cyclic redundancy checks (CRCs) and alignment; undersized or oversized packets, jabber, fragments, broadcast, multicast, and unicast messages; and bandwidth utilization.
The history group takes periodic samples from the statistics section and stores them for later retrieval. This sampling includes information such as utilization, error counts, and packet counts.
You can use the alarm group to set a sampling interval and threshold for any RMON recorded item. Examples of alarm settings include absolute or relative values, rising or falling thresholds of utilization, packet counts, and CRC errors.
The events group allows events (generated traps) to be logged and provided to a network manager. The time and date are recorded with each logged event. You can use the events group to create customized reports that are based on alarm types.
With RMON enabled, the switches collect and forward comprehensive network traffic information from multiple Ethernet segments simultaneously. This capability allows you to obtain information to help tune or troubleshoot a switched LAN.
Extended RMON capabilities are provided through the use of a networking monitoring probe (such as Cisco SwitchProbe) connected to the monitoring (Switched Port Analyzer (SPAN)) port of the switch.
