Cisco WS-C3560-48PS-S User manual

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Catalyst 3560 Switch
Software Configuration Guide
Cisco IOS Release 12.1(19)EA1
January 2004
Customer Order Number: DOC-7816156=
Text Part Number: 78-16156-01

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Catalyst 3560 Switch Software Configuration Guide
Copyright © 2004 Cisco Systems, Inc. All rights reserved.

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CONTENTS
Preface xxxiii
Audience xxxiii
Purpose xxxiii
Conventions xxxiv
Related Publications xxxv
Obtaining Documentation xxxv
Cisco.com xxxv
Documentation CD-ROM xxxvi
Ordering Documentation xxxvi
Documentation Feedback xxxvi
Obtaining Technical Assistance xxxvi
Cisco TAC Website xxxvii
Opening a TAC Case xxxvii
TAC CasePriority Definitions xxxvii
Obtaining AdditionalPublications and Information xxxviii
CHAPTER 1Overview 1-1
Features 1-1
Default Settings After Initial Switch Configuration 1-9
Network Configuration Examples 1-11
Design Concepts for Using the Switch 1-11
Small to Medium-Sized Network Using Catalyst 3560 Switches 1-13
Large Network Using Catalyst 3560 Switches 1-14
Long-Distance, High-Bandwidth Transport Configuration 1-16
Where to Go Next 1-16
CHAPTER 2Using the Command-Line Interface 2-1
Understanding Command Modes 2-1
Understanding the Help System 2-3
Understanding Abbreviated Commands 2-3
Understanding no and default Forms ofCommands 2-4
Understanding CLI Error Messages 2-4

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Using Command History 2-4
Changing the Command History Buffer Size 2-5
Recalling Commands 2-5
Disabling the Command History Feature 2-5
Using Editing Features 2-6
Enabling and Disabling Editing Features 2-6
Editing Commands through Keystrokes 2-6
Editing Command Lines that Wrap 2-8
Searching and Filtering Output of show and more Commands 2-8
Accessing the CLI 2-9
Accessing the CLI through a Console Connection or through Telnet 2-9
Accessing the CLI from a Browser 2-9
CHAPTER 3Getting Started with CMS 3-1
Understanding CMS 3-1
Front Panel View 3-2
Topology View 3-2
CMS Menu Bar, Toolbar, and Feature Bar 3-2
Online Help 3-5
Configuration Modes 3-5
Guide Mode 3-5
Expert Mode 3-6
Wizards 3-6
Privilege Levels 3-7
Access to Older Switches In a Cluster 3-7
Configuring CMS 3-8
CMS Requirements 3-8
Minimum Hardware Configuration 3-8
Operating System and BrowserSupport 3-9
CMS Plug-In Requirements 3-9
Cross-Platform Considerations 3-10
HTTP Access to CMS 3-10
Specifying an HTTP Port (Nondefault Configuration Only) 3-10
Configuring an Authentication Method (Nondefault Configuration Only) 3-10

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Displaying CMS 3-11
Launching CMS 3-11
Front Panel View 3-14
Topology View 3-15
CMS Icons 3-16
Where to Go Next 3-16
CHAPTER 4Assigning the Switch IP Address and Default Gateway 4-1
Understanding the Boot Process 4-1
Assigning Switch Information 4-2
Default Switch Information 4-3
Understanding DHCP-Based Autoconfiguration 4-3
DHCP Client Request Process 4-4
Configuring DHCP-Based Autoconfiguration 4-4
Configuring the DHCP Server 4-5
Configuring the TFTP Server 4-5
Configuring the DNS 4-6
Configuring the Relay Device 4-6
Obtaining Configuration Files 4-7
Example Configuration 4-8
Manually Assigning IP Information 4-9
Checking and Saving the Running Configuration 4-10
Modifying the Startup Configuration 4-11
Default Boot Configuration 4-12
Automatically Downloading a Configuration File 4-12
Specifying the Filename to Read and Write the System Configuration 4-12
Booting Manually 4-13
Booting a Specific Software Image 4-13
Controlling Environment Variables 4-14
Scheduling a Reload of the Software Image 4-16
Configuring a Scheduled Reload 4-16
Displaying Scheduled Reload Information 4-17

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CHAPTER 5Clustering Switches 5-1
Understanding Switch Clusters 5-2
Cluster Command Switch Characteristics 5-3
Standby Cluster Command Switch Characteristics 5-3
Candidate Switch and Cluster MemberSwitch Characteristics 5-4
Planning a Switch Cluster 5-4
Automatic Discovery of Cluster Candidates and Members 5-5
Discovery Through CDP Hops 5-5
Discovery Through Non-CDP-Capable and Noncluster-Capable Devices 5-6
Discovery Through Different VLANs 5-7
Discovery Through Different Management VLANs 5-7
Discovery Through Routed Ports 5-8
Discovery of Newly Installed Switches 5-9
HSRP and Standby Cluster Command Switches 5-10
Virtual IP Addresses 5-11
Other Considerations for Cluster Standby Groups 5-11
Automatic Recovery of Cluster Configuration 5-12
IP Addresses 5-13
Host Names 5-13
Passwords 5-14
SNMP Community Strings 5-14
TACACS+ and RADIUS 5-14
Access Modes in CMS 5-15
LRE Profiles 5-15
Availability of Switch-Specific Features in Switch Clusters 5-15
Creating a Switch Cluster 5-16
Enabling a Cluster Command Switch 5-16
Adding Cluster Member Switches 5-17
Creating a Cluster Standby Group 5-19
Verifying a Switch Cluster 5-20
Using the CLI to Manage Switch Clusters 5-21
Catalyst 1900 and Catalyst 2820 CLI Considerations 5-22
Using SNMP to Manage Switch Clusters 5-22

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CHAPTER 6Administering the Switch 6-1
Managing the System Time and Date 6-1
Understanding the System Clock 6-2
Understanding Network Time Protocol 6-2
Configuring NTP 6-4
Default NTP Configuration 6-4
Configuring NTP Authentication 6-5
Configuring NTP Associations 6-6
Configuring NTP Broadcast Service 6-7
Configuring NTP Access Restrictions 6-8
Configuring the Source IP Address for NTP Packets 6-10
Displaying the NTP Configuration 6-11
Configuring Time and Date Manually 6-11
Setting the System Clock 6-11
Displaying the Time and Date Configuration 6-12
Configuring the Time Zone 6-12
Configuring Summer Time (Daylight Saving Time) 6-13
Configuring a System Nameand Prompt 6-15
Default System Name and Prompt Configuration 6-15
Configuring a System Name 6-15
Configuring a System Prompt 6-16
Understanding DNS 6-16
Default DNS Configuration 6-17
Setting Up DNS 6-17
Displaying the DNS Configuration 6-18
Creating a Banner 6-18
Default Banner Configuration 6-18
Configuring a Message-of-the-Day Login Banner 6-19
Configuring a Login Banner 6-20
Managing the MAC Address Table 6-21
Building the Address Table 6-21
MAC Addresses and VLANs 6-22
Default MAC Address Table Configuration 6-22
Changing the Address Aging Time 6-22
Removing Dynamic Address Entries 6-23
Configuring MAC Address Notification Traps 6-23

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Adding and Removing Static Address Entries 6-25
Configuring Unicast MAC Address Filtering 6-26
Displaying Address Table Entries 6-28
Managing the ARP Table 6-28
CHAPTER 7Configuring SDM Templates 7-1
Understanding the SDM Templates 7-1
Configuring the Switch SDM Template 7-2
Default SDM Template 7-2
SDM Template Configuration Guidelines 7-2
Setting the SDM Template 7-3
Displaying the SDM Templates 7-4
CHAPTER 8Configuring Switch-Based Authentication 8-1
Preventing Unauthorized Access to Your Switch 8-1
Protecting Access to Privileged EXEC Commands 8-2
Default Password and Privilege Level Configuration 8-2
Setting or Changing a Static Enable Password 8-3
Protecting Enable and Enable Secret Passwords with Encryption 8-4
Disabling Password Recovery 8-5
Setting a Telnet Password for a Terminal Line 8-6
Configuring Username and Password Pairs 8-7
Configuring Multiple Privilege Levels 8-8
Setting the Privilege Level for a Command 8-8
Changing the Default Privilege Level for Lines 8-9
Logging into and Exiting a Privilege Level 8-10
Controlling Switch Access with TACACS+ 8-10
Understanding TACACS+ 8-10
TACACS+ Operation 8-12
Configuring TACACS+ 8-13
Default TACACS+ Configuration 8-13
Identifying the TACACS+ Server Host and Setting the Authentication Key 8-13
Configuring TACACS+ Login Authentication 8-14
Configuring TACACS+ Authorization for Privileged EXEC Access and Network Services 8-16
Starting TACACS+ Accounting 8-17
Displaying the TACACS+ Configuration 8-17

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Controlling Switch Access with RADIUS 8-18
Understanding RADIUS 8-18
RADIUS Operation 8-19
Configuring RADIUS 8-20
Default RADIUS Configuration 8-20
Identifying the RADIUS Server Host 8-21
Configuring RADIUS Login Authentication 8-23
Defining AAA Server Groups 8-25
Configuring RADIUS Authorization for User Privileged Access and Network Services 8-27
Starting RADIUS Accounting 8-28
Configuring Settings for All RADIUS Servers 8-29
Configuring the Switch to Use Vendor-Specific RADIUS Attributes 8-29
Configuring the Switch for Vendor-Proprietary RADIUS Server Communication 8-31
Displaying the RADIUS Configuration 8-31
Controlling Switch Access with Kerberos 8-32
Understanding Kerberos 8-32
Kerberos Operation 8-34
Authenticating to a Boundary Switch 8-35
Obtaining a TGT from a KDC 8-35
Authenticating to Network Services 8-35
Configuring Kerberos 8-36
Configuring the Switch for Local Authentication and Authorization 8-36
Configuring the Switch for Secure Shell 8-37
Understanding SSH 8-38
SSH Servers, Integrated Clients, and Supported Versions 8-38
Limitations 8-38
Configuring SSH 8-39
ConfigurationGuidelines 8-39
Setting Up the Switch to Run SSH 8-39
Configuring the SSH Server 8-40
Displaying the SSH Configuration and Status 8-41
CHAPTER 9Configuring 802.1X Port-Based Authentication 9-1
Understanding 802.1X Port-Based Authentication 9-1
Device Roles 9-2
Authentication Initiation and Message Exchange 9-3
Ports in Authorized and Unauthorized States 9-4
Supported Topologies 9-4
Using 802.1X with Port Security 9-5

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Using 802.1X with Voice VLAN Ports 9-6
Using 802.1X with VLAN Assignment 9-6
Using 802.1X with Guest VLAN 9-8
Using 802.1X with Per-User ACLs 9-8
Configuring 802.1X Authentication 9-9
Default 802.1X Configuration 9-10
802.1X Configuration Guidelines 9-11
Configuring 802.1X Authentication 9-11
Configuring the Switch-to-RADIUS-ServerCommunication 9-13
Configuring Periodic Re-Authentication 9-14
Manually Re-Authenticating a Client Connected to a Port 9-14
Changing the Quiet Period 9-15
Changing the Switch-to-Client Retransmission Time 9-15
Setting the Switch-to-Client Frame-Retransmission Number 9-16
Configuring the Host Mode 9-17
Configuring a Guest VLAN 9-18
Resetting the 802.1X Configuration to the Default Values 9-18
Displaying 802.1X Statisticsand Status 9-19
CHAPTER 10 Configuring Interface Characteristics 10-1
Understanding Interface Types 10-1
Port-Based VLANs 10-2
Switch Ports 10-2
Access Ports 10-2
Trunk Ports 10-3
Routed Ports 10-3
Switch Virtual Interfaces 10-4
EtherChannelPort Groups 10-5
Connecting Interfaces 10-5
Using Interface Configuration Mode 10-6
Procedures for Configuring Interfaces 10-7
Configuring a Range of Interfaces 10-8
Configuring and Using Interface Range Macros 10-9
Configuring EthernetInterfaces 10-11
Default Ethernet Interface Configuration 10-11
Configuring Interface Speed and Duplex Mode 10-12
ConfigurationGuidelines 10-13
Setting the Interface Speed and Duplex Parameters 10-13