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Cisco WS-C2960-24TT-L User Manual

Cisco WS-C2960-24TT-L
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5-27
Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide
78-6511-08
Chapter 5 Clustering Switches
Using SNMP to Manage Switch Clusters
Using SNMP to Manage Switch Clusters
When you first power on the switch, SNMP is enabled if you enter the IP information by using the setup
program and accept its proposed configuration. If you did not use the setup program to enter the IP
information and SNMP was not enabled, you can enable it as described in the Configuring SNMP
section on page 6-48. On Catalyst 1900 and Catalyst 2820 switches, SNMP is enabled by default.
When you create a cluster, the command switch manages the exchange of messages between member
switches and an SNMP application. The cluster software on the command switch appends the member
switch number (@esN, where N is the switch number) to the first configured read-write and read-only
community strings on the command switch and propagates them to the member switch. The command
switch uses this community string to control the forwarding of gets, sets, and get-next messages between
the SNMP management station and the member switches.
Note When a cluster standby group is configured, the command switch can change without your knowledge.
Use the first read-write and read-only community strings to communicate with the command switch if
there is a cluster standby group configured for the cluster.
If the member switch does not have an IP address, the command switch redirects traps from the member
switch to the management station, as shown in Figure 5-13. If a member switch has its own IP address
and community strings, the member switch can send traps directly to the management station, without
going through the command switch.
If a member switch has its own IP address and community strings, they can be used in addition to the
access provided by the command switch. For more information about SNMP and community strings, see
the Configuring SNMP section on page 6-48.
Figure 5-13 SNMP Management for a Cluster
Trap
Trap
Trap
Command switch
Trap 1, Trap 2, Trap 3
Member 1 Member 2 Member 3
33020
SNMP Manager

Table of Contents

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Cisco WS-C2960-24TT-L Specifications

General IconGeneral
ModelWS-C2960-24TT-L
Forwarding Rate6.5 Mpps
RAM64 MB
Flash Memory32 MB
Power DeviceInternal power supply
Form FactorRack-mountable
Weight3.6 kg
Product SeriesCisco Catalyst 2960
Uplink Ports2 x 10/100/1000
MAC Address Table Size8000 entries
Routing ProtocolStatic IP routing
FeaturesVLAN support, Quality of Service (QoS)
Compliant StandardsIEEE 802.3, IEEE 802.1D, IEEE 802.1Q, IEEE 802.1p
Status Indicatorssystem status
Voltage Required100-240 VAC
Dimensions (H x W x D)4.4 cm x 45 cm x 23.6 cm
Operating Temperature0 to 40 °C
Operating Humidity10% to 85% non-condensing
Power Consumption30 W
Ports24 10/100 Ethernet ports

Summary

Chapter 1 Overview

Features

Describes the software features for Catalyst 2900 XL and Catalyst 3500 XL switches.

Management Options

Discusses the various interfaces for configuring and monitoring switches and clusters.

Network Configuration Examples

Provides examples of using switches to create dedicated network segments.

Where to Go To Next

Guides users to related sections for further startup information.

Chapter 2 Getting Started with CMS

Features

Details the features of the Cluster Management Suite (CMS) for managing switches.

Front Panel View

Explains the Front Panel view in CMS for displaying switch images and selecting ports.

Topology View

Describes the Topology view for displaying network maps and device connections.

Menus and Toolbar

Explains how to use menus and toolbars in CMS for configuration and management.

Interaction Modes

Describes the Guide and Expert modes for configuring features in CMS.

Wizards

Explains how wizards simplify configuration tasks by requiring minimal information.

Online Help

Details the comprehensive online help available within CMS for assistance.

CMS Window Components

Describes the components of a typical CMS window, like tabs, lists, and buttons.

Accessing CMS

Provides steps for accessing the CMS interface through a web browser.

Verifying Your Changes

Explains how CMS provides notification cues to track and confirm changes.

Saving Your Changes

Details how to save configuration changes to Flash memory to prevent loss on restart.

Using Different Versions of CMS

Discusses how CMS can differ between IOS releases and switch platforms.

Where to Go Next

Guides users to relevant sections for further information on CMS and clusters.

Chapter 3 Getting Started with the CLI

Command Usage Basics

Covers topics like accessing command modes, abbreviating commands, and getting help.

Command-Line Error Messages

Lists common CLI error messages and how to get help for them.

Accessing the CLI

Explains how to access the CLI through a terminal session or a web browser.

Saving Configuration Changes

Details how to save running configuration changes to startup configuration.

Where to Go Next

Guides users to related sections for further startup information.

Chapter 4 General Switch Administration

Initial Switch Configuration

Covers tasks like cabling, using the setup program, and assigning IP information.

Switch Software Releases

Discusses how to check software versions and the importance of upgrades.

Console Port Access

Explains how to access the switch through the console port.

Telnet Access to the CLI

Provides steps for accessing the CLI via Telnet for switch management.

HTTP Access to CMS

Details how to access the CMS interface using HTTP.

SNMP Network Management Platforms

Discusses using SNMP-compatible management stations for switch management.

Default Settings

Lists key software features, their default settings, and where to change them.

Chapter 5 Clustering Switches

Understanding Switch Clusters

Defines a switch cluster as a group of switches managed as a single entity.

Planning a Switch Cluster

Covers guidelines, requirements, and caveats for managing multiple switches in a cluster.

Creating a Switch Cluster

Provides information on using CMS and CLI commands to create a switch cluster.

Using the CLI to Manage Switch Clusters

Explains how to manage member switches from the CLI via the command switch.

Using SNMP to Manage Switch Clusters

Discusses how to manage cluster switches using SNMP and the command switch.

Chapter 6 Configuring the System

Changing IP Information

Details methods for assigning and changing switch IP information.

Assigning Passwords and Privilege Levels

Explains how to assign passwords and privilege levels for switch access.

Setting the System Date and Time

Covers changing the system date and time, including daylight saving settings.

Configuring CDP

Explains how to enable Cisco Discovery Protocol (CDP) for network discovery.

Managing the MAC Address Tables

Discusses managing MAC address tables, including aging and static entries.

Configuring CGMP

Details how CGMP reduces unnecessary flooding of IP multicast packets.

Configuring IGMP Filtering

Explains how IGMP filtering works with MVR to configure IP multicast groups.

Configuring MVR

Describes Multicast VLAN Registration (MVR) for wide-scale multicast traffic deployment.

Managing the ARP Table

Explains how ARP associates IP addresses with MAC addresses for communication.

Configuring STP

Covers Spanning Tree Protocol for path redundancy and preventing loops.

Configuring SNMP

Details how to configure the SNMP agent for network management.

Configuring TACACS+

Explains how TACACS+ manages network security through a central server.

Controlling Switch Access with RADIUS

Describes how to enable and configure RADIUS for authentication and authorization.

Chapter 7 Configuring the Switch Ports

Changing the Port Speed and Duplex Mode

Details how to set port speed and duplex parameters for optimal performance.

Configuring Flooding Controls

Explains techniques to block forwarding of unnecessary flooded traffic.

Configuring UniDirectional Link Detection

Describes UDLD protocol for detecting and shutting down unidirectional links.

Creating EtherChannel Port Groups

Explains how EtherChannel port groups act as single logical ports for high-bandwidth connections.

Configuring Protected Ports

Details how protected ports prevent traffic forwarding between ports on the same switch.

Enabling Port Security

Explains how secured ports restrict access to a user-defined group of stations.

Configuring SPAN

Describes Switch Port Analyzer (SPAN) for monitoring traffic on switch ports.

Configuring Voice Ports

Covers configuring ports to carry IP voice traffic and prioritize it using QoS.

Configuring Inline Power on the Catalyst 3524-PWR Ports

Details how to configure inline power on specific switch ports for devices like IP phones.

Configuring the LRE Ports

Explains how to configure LRE ports for data, voice, and video traffic transmission.

Chapter 8 Configuring VLANs

Overview

Defines a virtual LAN (VLAN) as a switched network logically segmented by function.

Management VLANs

Discusses the characteristics and configuration of management VLANs for switch communication.

Assigning VLAN Port Membership Modes

Explains how to configure port membership modes, determining traffic type and VLAN belonging.

Assigning Static-Access Ports to a VLAN

Details how to assign static-access ports to a VLAN for manual configuration.

Overlapping VLANs and Multi-VLAN Ports

Describes how multi-VLAN ports connect to routers to link multiple VLANs.

Using VTP

Explains VTP for maintaining VLAN configuration consistency across a network.

VLANs in the VTP Database

Covers setting parameters for adding, modifying, or deleting VLANs in the VTP database.

How VLAN Trunks Work

Explains how trunks send and receive traffic for multiple VLANs over a single link.

Configuring 802.1p Class of Service

Details how QoS uses IEEE 802.1p CoS values to assign traffic priority.

Load Sharing Using STP

Explains how load sharing divides bandwidth by using STP port priorities or path costs.

How the VMPS Works

Describes the VLAN Membership Policy Server (VMPS) for dynamic port VLAN assignment.

Chapter 9 Troubleshooting

Statistics

Describes how to retrieve and interpret switch and LRE CPE statistics.

Avoiding Configuration Conflicts

Identifies conflicting port feature combinations to avoid operational issues.

Avoiding Autonegotiation Mismatches

Addresses issues where autonegotiation incorrectly aligns speed and duplex settings.

GBIC Security and Identification

Explains the security and identification checks for GBIC modules.

Troubleshooting LRE Port Configuration

Lists common problems with LRE ports and provides suggested solutions.

Troubleshooting CMS Sessions

Identifies common problems encountered when using the CMS interface.

Determining Why a Switch Is Not Added to a Cluster

Guides users on how to diagnose why a switch might not join a cluster.

Copying Configuration Files to Troubleshoot Configuration Problems

Explains how to use file system operations to copy and troubleshoot configuration files.

Troubleshooting Switch Software Upgrades

Addresses problems that may occur during switch software upgrades.

Recovery Procedures

Outlines procedures for recovering from various switch failures or issues.

Appendix A System Messages

Overview

Explains how system software sends IOS messages to the console or logging server.

How to Read System Messages

Details the structure and components of system messages for interpretation.

Error Message Traceback Reports

Explains the importance of traceback information for reporting internal errors.

Error Message and Recovery Procedures

Lists system messages by facility, severity, and provides explanations and actions.

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