Cisco WS-C3020 User manual

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Cisco Catalyst Blade Switch 3020 for HP
Software Configuration Guide
Cisco IOS Release 12.2(44)SE
January 2008
Text Part Number: OL-8915-03

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Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide
© 2006-2008 Cisco Systems, Inc. All rights reserved.

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CONTENTS
Preface xxxv
Audience xxxv
Purpose xxxv
Conventions xxxvi
Related Publications xxxvi
Obtaining Documentation and Submitting a Service Request xxxvii
CHAPTER 1Overview 1-1
Features 1-1
Ease-of-Deployment and Ease-of-Use Features 1-2
Performance Features 1-2
Management Options 1-3
Manageability Features 1-4
Availability and Redundancy Features 1-5
VLAN Features 1-6
Security Features 1-6
QoS and CoS Features 1-8
Layer 3 Features 1-9
Monitoring Features 1-10
Default Settings After Initial Switch Configuration 1-10
Design Concepts for Using the Switch 1-13
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 2-4
Understanding no and default Forms of Commands 2-4
Understanding CLI Error Messages 2-5
Using Configuration Logging 2-5

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Using Command History 2-6
Changing the Command History Buffer Size 2-6
Recalling Commands 2-6
Disabling the Command History Feature 2-7
Using Editing Features 2-7
Enabling and Disabling Editing Features 2-7
Editing Commands through Keystrokes 2-7
Editing Command Lines that Wrap 2-9
Searching and Filtering Output of show and more Commands 2-10
Accessing the CLI 2-10
CHAPTER 3Assigning the Switch IP Address and Default Gateway 3-1
Understanding the Bootup Process 3-1
Assigning Switch Information 3-2
Default Switch Information 3-3
Understanding DHCP-Based Autoconfiguration 3-3
DHCP Client Request Process 3-4
Understanding DHCP-based Autoconfiguration and Image Update 3-4
DHCP Autoconfiguration 3-5
DHCP Auto-Image Update 3-5
Limitations and Restrictions 3-5
Configuring DHCP-Based Autoconfiguration 3-6
DHCP Server Configuration Guidelines 3-6
Configuring the TFTP Server 3-7
Configuring the DNS 3-7
Configuring the Relay Device 3-7
Obtaining Configuration Files 3-8
Example Configuration 3-9
Configuring the DHCP Auto Configuration and Image Update Features 3-11
Configuring DHCP Autoconfiguration (Only Configuration File) 3-11
Configuring DHCP Auto-Image Update (Configuration File and Image) 3-12
Configuring the Client 3-13
Manually Assigning IP Information 3-14
Checking and Saving the Running Configuration 3-15
Modifying the Startup Configuration 3-17
Default Bootup Configuration 3-18
Automatically Downloading a Configuration File 3-18
Specifying the Filename to Read and Write the System Configuration 3-18
Booting Up Manually 3-19

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Booting Up a Specific Software Image 3-19
Controlling Environment Variables 3-20
Scheduling a Reload of the Software Image 3-21
Configuring a Scheduled Reload 3-22
Displaying Scheduled Reload Information 3-23
CHAPTER 4Configuring Cisco IOS CNS Agents 4-1
Understanding Cisco Configuration Engine Software 4-1
Configuration Service 4-2
Event Service 4-3
NameSpace Mapper 4-3
What You Should Know About the CNS IDs and Device Hostnames 4-3
ConfigID 4-3
DeviceID 4-4
Hostname and DeviceID 4-4
Using Hostname, DeviceID, and ConfigID 4-4
Understanding Cisco IOS Agents 4-5
Initial Configuration 4-5
Incremental (Partial) Configuration 4-6
Synchronized Configuration 4-6
Configuring Cisco IOS Agents 4-6
Enabling Automated CNS Configuration 4-6
Enabling the CNS Event Agent 4-8
Enabling the Cisco IOS CNS Agent 4-9
Enabling an Initial Configuration 4-9
Enabling a Partial Configuration 4-13
Displaying CNS Configuration 4-14
CHAPTER 5Administering the Switch 5-1
Managing the System Time and Date 5-1
Understanding the System Clock 5-1
Understanding Network Time Protocol 5-2
Configuring NTP 5-3
Default NTP Configuration 5-4
Configuring NTP Authentication 5-4
Configuring NTP Associations 5-5
Configuring NTP Broadcast Service 5-6
Configuring NTP Access Restrictions 5-8

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Configuring the Source IP Address for NTP Packets 5-10
Displaying the NTP Configuration 5-11
Configuring Time and Date Manually 5-11
Setting the System Clock 5-11
Displaying the Time and Date Configuration 5-12
Configuring the Time Zone 5-12
Configuring Summer Time (Daylight Saving Time) 5-13
Configuring a System Name and Prompt 5-14
Default System Name and Prompt Configuration 5-15
Configuring a System Name 5-15
Understanding DNS 5-15
Default DNS Configuration 5-16
Setting Up DNS 5-16
Displaying the DNS Configuration 5-17
Creating a Banner 5-17
Default Banner Configuration 5-17
Configuring a Message-of-the-Day Login Banner 5-18
Configuring a Login Banner 5-19
Managing the MAC Address Table 5-19
Building the Address Table 5-20
MAC Addresses and VLANs 5-20
Default MAC Address Table Configuration 5-21
Changing the Address Aging Time 5-21
Removing Dynamic Address Entries 5-22
Configuring MAC Address Notification Traps 5-22
Adding and Removing Static Address Entries 5-24
Configuring Unicast MAC Address Filtering 5-25
Displaying Address Table Entries 5-26
Managing the ARP Table 5-27
CHAPTER 6Configuring SDM Templates 6-1
Understanding the SDM Templates 6-1
Dual IPv4 and IPv6 SDM Templates 6-2
Configuring the Switch SDM Template 6-3
Default SDM Template 6-3
SDM Template Configuration Guidelines 6-4
Setting the SDM Template 6-4
Displaying the SDM Templates 6-5

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CHAPTER 7Configuring Switch-Based Authentication 7-1
Preventing Unauthorized Access to Your Switch 7-1
Protecting Access to Privileged EXEC Commands 7-2
Default Password and Privilege Level Configuration 7-2
Setting or Changing a Static Enable Password 7-3
Protecting Enable and Enable Secret Passwords with Encryption 7-3
Disabling Password Recovery 7-5
Setting a Telnet Password for a Terminal Line 7-6
Configuring Username and Password Pairs 7-6
Configuring Multiple Privilege Levels 7-7
Setting the Privilege Level for a Command 7-8
Changing the Default Privilege Level for Lines 7-9
Logging into and Exiting a Privilege Level 7-9
Controlling Switch Access with TACACS+ 7-10
Understanding TACACS+ 7-10
TACACS+ Operation 7-12
Configuring TACACS+ 7-12
Default TACACS+ Configuration 7-13
Identifying the TACACS+ Server Host and Setting the Authentication Key 7-13
Configuring TACACS+ Login Authentication 7-14
Configuring TACACS+ Authorization for Privileged EXEC Access and Network Services 7-16
Starting TACACS+ Accounting 7-17
Displaying the TACACS+ Configuration 7-17
Controlling Switch Access with RADIUS 7-17
Understanding RADIUS 7-18
RADIUS Operation 7-19
Configuring RADIUS 7-20
Default RADIUS Configuration 7-20
Identifying the RADIUS Server Host 7-20
Configuring RADIUS Login Authentication 7-23
Defining AAA Server Groups 7-25
Configuring RADIUS Authorization for User Privileged Access and Network Services 7-27
Starting RADIUS Accounting 7-28
Configuring Settings for All RADIUS Servers 7-29
Configuring the Switch to Use Vendor-Specific RADIUS Attributes 7-29
Configuring the Switch for Vendor-Proprietary RADIUS Server Communication 7-31
Displaying the RADIUS Configuration 7-31

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Controlling Switch Access with Kerberos 7-32
Understanding Kerberos 7-32
Kerberos Operation 7-34
Authenticating to a Boundary Switch 7-34
Obtaining a TGT from a KDC 7-35
Authenticating to Network Services 7-35
Configuring Kerberos 7-35
Configuring the Switch for Local Authentication and Authorization 7-36
Configuring the Switch for Secure Shell 7-37
Understanding SSH 7-37
SSH Servers, Integrated Clients, and Supported Versions 7-37
Limitations 7-38
Configuring SSH 7-38
Configuration Guidelines 7-38
Setting Up the Switch to Run SSH 7-39
Configuring the SSH Server 7-40
Displaying the SSH Configuration and Status 7-41
Configuring the Switch for Secure Socket Layer HTTP 7-41
Understanding Secure HTTP Servers and Clients 7-41
Certificate Authority Trustpoints 7-42
CipherSuites 7-43
Configuring Secure HTTP Servers and Clients 7-44
Default SSL Configuration 7-44
SSL Configuration Guidelines 7-44
Configuring a CA Trustpoint 7-44
Configuring the Secure HTTP Server 7-45
Configuring the Secure HTTP Client 7-47
Displaying Secure HTTP Server and Client Status 7-47
Configuring the Switch for Secure Copy Protocol 7-48
Information About Secure Copy 7-48
CHAPTER 8Configuring IEEE 802.1x Port-Based Authentication 8-1
Understanding IEEE 802.1x Port-Based Authentication 8-1
Device Roles 8-2
Authentication Process 8-3
Authentication Initiation and Message Exchange 8-5
Ports in Authorized and Unauthorized States 8-7
IEEE 802.1x Host Mode 8-7
IEEE 802.1x Accounting 8-8

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IEEE 802.1x Accounting Attribute-Value Pairs 8-8
Using 802.1x Readiness Check 8-9
Using IEEE 802.1x Authentication with VLAN Assignment 8-10
Using IEEE 802.1x Authentication with Per-User ACLs 8-11
Using IEEE 802.1x Authentication with Guest VLAN 8-12
Using IEEE 802.1x Authentication with Restricted VLAN 8-13
Using IEEE 802.1x Authentication with Inaccessible Authentication Bypass 8-14
Using IEEE 802.1x Authentication with Voice VLAN Ports 8-15
Using IEEE 802.1x Authentication with Port Security 8-15
Using IEEE 802.1x Authentication with Wake-on-LAN 8-16
Using IEEE 802.1x Authentication with MAC Authentication Bypass 8-17
Network Admission Control Layer 2 IEEE 802.1x Validation 8-18
Using Voice Aware 802.1x Security 8-18
Using Web Authentication 8-19
Web Authentication with Automatic MAC Check 8-19
Configuring IEEE 802.1x Authentication 8-20
Default IEEE 802.1x Authentication Configuration 8-20
IEEE 802.1x Authentication Configuration Guidelines 8-22
IEEE 802.1x Authentication 8-22
VLAN Assignment, Guest VLAN, Restricted VLAN, and Inaccessible Authentication
Bypass 8-23
MAC Authentication Bypass 8-23
Configuring 802.1x Readiness Check 8-24
Configuring Voice Aware 802.1x Security 8-25
Configuring IEEE 802.1x Authentication 8-26
Configuring the Switch-to-RADIUS-Server Communication 8-27
Configuring the Host Mode 8-29
Configuring Periodic Re-Authentication 8-29
Manually Re-Authenticating a Client Connected to a Port 8-30
Changing the Quiet Period 8-30
Changing the Switch-to-Client Retransmission Time 8-31
Setting the Switch-to-Client Frame-Retransmission Number 8-32
Setting the Re-Authentication Number 8-32
Configuring IEEE 802.1x Accounting 8-33
Configuring a Guest VLAN 8-34
Configuring a Restricted VLAN 8-35
Configuring the Inaccessible Authentication Bypass Feature 8-36
Configuring IEEE 802.1x Authentication with WoL 8-39
Configuring MAC Authentication Bypass 8-39
Configuring NAC Layer 2 IEEE 802.1x Validation 8-40

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Configuring Web Authentication 8-41
Disabling IEEE 802.1x Authentication on the Port 8-44
Resetting the IEEE 802.1x Authentication Configuration to the Default Values 8-44
Displaying IEEE 802.1x Statistics and Status 8-45
CHAPTER 9Configuring Interface Characteristics 9-1
Understanding Interface Types 9-1
Port-Based VLANs 9-2
Switch Ports 9-2
Internal Gigabit Ethernet Ports 9-3
Access Ports 9-3
Trunk Ports 9-3
Tunnel Ports 9-4
Routed Ports 9-4
Switch Virtual Interfaces 9-5
EtherChannel Port Groups 9-5
Dual-Purpose Uplink Ports 9-6
Connecting Interfaces 9-6
Management-Only Interface 9-7
Using Interface Configuration Mode 9-7
Procedures for Configuring Interfaces 9-8
Configuring a Range of Interfaces 9-9
Configuring and Using Interface Range Macros 9-10
Configuring Ethernet Interfaces 9-12
Default Ethernet Interface Configuration 9-12
Setting the Type of a Dual-Purpose Uplink Port 9-13
Configuring Interface Speed and Duplex Mode 9-15
Speed and Duplex Configuration Guidelines 9-15
Setting the Interface Speed and Duplex Parameters 9-16
Configuring IEEE 802.3x Flow Control 9-17
Configuring Auto-MDIX on an Interface 9-18
Adding a Description for an Interface 9-19
Configuring Layer 3 Interfaces 9-19
Configuring the System MTU 9-21
Monitoring and Maintaining the Interfaces 9-22
Monitoring Interface Status 9-23
Clearing and Resetting Interfaces and Counters 9-23
Shutting Down and Restarting the Interface 9-24