Cisco Catalyst 3560V2-24DC Switch User manual

Category
Software
Type
User manual
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Catalyst 3560 Switch Software
Configuration Guide
Cisco IOS Release 12.2(50)SE
March 2009
Text Part Number: OL-8553-06
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Catalyst 3560 Switch Software Configuration Guide
© 2006-2008 Cisco Systems, Inc. All rights reserved.
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CONTENTS
Preface xlv
Audience xlv
Purpose xlv
Conventions xlvi
Related Publications xlvi
Obtaining Documentation, Obtaining Support, and Security Guidelines xlvii
CHAPTER
1 Overview 1-1
Features 1-1
Ease-of-Deployment and Ease-of-Use Features 1-2
Performance Features 1-3
Management Options 1-4
Manageability Features 1-5
Availability and Redundancy Features 1-7
VLAN Features 1-7
Security Features 1-8
QoS and CoS Features 1-11
Layer 3 Features 1-12
Power over Ethernet Features 1-13
Monitoring Features 1-13
Default Settings After Initial Switch Configuration 1-14
Network Configuration Examples 1-17
Design Concepts for Using the Switch 1-17
Small to Medium-Sized Network Using Catalyst 3560 Switches 1-20
Large Network Using Catalyst 3560 Switches 1-21
Long-Distance, High-Bandwidth Transport Configuration 1-23
Where to Go Next 1-23
CHAPTER
2 Using 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
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Understanding CLI Error Messages 2-5
Using Configuration Logging 2-5
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
Accessing the CLI through a Console Connection or through Telnet 2-10
CHAPTER
3 Assigning the Switch IP Address and Default Gateway 3-1
Understanding the Boot 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 3-5
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 3-8
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
Contents
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Modifying the Startup Configuration 3-16
Default Boot Configuration 3-16
Automatically Downloading a Configuration File 3-16
Specifying the Filename to Read and Write the System Configuration 3-16
Booting Manually 3-17
Booting a Specific Software Image 3-18
Controlling Environment Variables 3-18
Scheduling a Reload of the Software Image 3-20
Configuring a Scheduled Reload 3-20
Displaying Scheduled Reload Information 3-21
CHAPTER
4 Configuring Cisco EnergyWise 4-1
Managing Single Entities 4-1
EnergyWise Entity 4-1
EnergyWise Domain 4-2
EnergyWise Network 4-2
Single PoE Switch Scenario 4-3
EnergyWise Power Level 4-4
EnergyWise Importance 4-5
EnergyWise Names, Roles, and Keywords 4-5
Configuration Guidelines 4-5
PoE and EnergyWise Interactions 4-5
Manually Managing Power 4-6
Powering the Entity 4-6
Configuring Entity Attributes 4-7
Powering the PoE Port 4-8
Configuring PoE-Port Attributes 4-8
Automatically Managing Power (Recurrence) 4-9
Examples 4-11
Setting Up the Domain 4-11
Manually Managing Power 4-12
Automatically Managing Power 4-12
Managing Multiple Entities 4-12
Multiple PoE Switch Scenario 4-13
EnergyWise Query 4-13
Using Queries to Manage Power in the Domain 4-14
Contents
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Examples 4-15
Querying with the Name Attribute 4-15
Querying with Keywords 4-16
Querying to Set Power Levels 4-16
Troubleshooting EnergyWise 4-16
Using CLI Commands 4-17
Verifying the Power Usage 4-17
Additional Information 4-18
Managing Power in a LAN 4-18
Managing Power with IP Routing 4-18
CHAPTER
5 Configuring Cisco IOS Configuration Engine 5-1
Understanding Cisco Configuration Engine Software 5-1
Configuration Service 5-2
Event Service 5-3
NameSpace Mapper 5-3
What You Should Know About the CNS IDs and Device Hostnames 5-3
ConfigID 5-3
DeviceID 5-4
Hostname and DeviceID 5-4
Using Hostname, DeviceID, and ConfigID 5-4
Understanding Cisco IOS Agents 5-5
Initial Configuration 5-5
Incremental (Partial) Configuration 5-6
Synchronized Configuration 5-6
Configuring Cisco IOS Agents 5-6
Enabling Automated CNS Configuration 5-6
Enabling the CNS Event Agent 5-7
Enabling the Cisco IOS CNS Agent 5-9
Enabling an Initial Configuration 5-9
Enabling a Partial Configuration 5-13
Displaying CNS Configuration 5-14
CHAPTER
6 Clustering Switches 6-1
Understanding Switch Clusters 6-1
Cluster Command Switch Characteristics 6-3
Standby Cluster Command Switch Characteristics 6-3
Candidate Switch and Cluster Member Switch Characteristics 6-3
Contents
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Planning a Switch Cluster 6-4
Automatic Discovery of Cluster Candidates and Members 6-4
Discovery Through CDP Hops 6-5
Discovery Through Non-CDP-Capable and Noncluster-Capable Devices 6-6
Discovery Through Different VLANs 6-6
Discovery Through Different Management VLANs 6-7
Discovery Through Routed Ports 6-8
Discovery of Newly Installed Switches 6-9
HSRP and Standby Cluster Command Switches 6-10
Virtual IP Addresses 6-10
Other Considerations for Cluster Standby Groups 6-11
Automatic Recovery of Cluster Configuration 6-12
IP Addresses 6-13
Hostnames 6-13
Passwords 6-13
SNMP Community Strings 6-14
TACACS+ and RADIUS 6-14
LRE Profiles 6-14
Using the CLI to Manage Switch Clusters 6-15
Catalyst 1900 and Catalyst 2820 CLI Considerations 6-15
Using SNMP to Manage Switch Clusters 6-15
CHAPTER
7 Administering the Switch 7-1
Managing the System Time and Date 7-1
Understanding the System Clock 7-1
Understanding Network Time Protocol 7-2
Configuring NTP 7-3
Default NTP Configuration 7-4
Configuring NTP Authentication 7-4
Configuring NTP Associations 7-5
Configuring NTP Broadcast Service 7-6
Configuring NTP Access Restrictions 7-8
Configuring the Source IP Address for NTP Packets 7-10
Displaying the NTP Configuration 7-11
Configuring Time and Date Manually 7-11
Setting the System Clock 7-11
Displaying the Time and Date Configuration 7-12
Configuring the Time Zone 7-12
Configuring Summer Time (Daylight Saving Time) 7-13
Contents
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Configuring a System Name and Prompt 7-14
Default System Name and Prompt Configuration 7-15
Configuring a System Name 7-15
Understanding DNS 7-15
Default DNS Configuration 7-16
Setting Up DNS 7-16
Displaying the DNS Configuration 7-17
Creating a Banner 7-17
Default Banner Configuration 7-17
Configuring a Message-of-the-Day Login Banner 7-18
Configuring a Login Banner 7-18
Managing the MAC Address Table 7-19
Building the Address Table 7-20
MAC Addresses and VLANs 7-20
Default MAC Address Table Configuration 7-21
Changing the Address Aging Time 7-21
Removing Dynamic Address Entries 7-22
Configuring MAC Address Notification Traps 7-22
Adding and Removing Static Address Entries 7-24
Configuring Unicast MAC Address Filtering 7-25
Disabling MAC Address Learning on a VLAN 7-26
Displaying Address Table Entries 7-27
Managing the ARP Table 7-28
CHAPTER
8 Configuring SDM Templates 8-1
Understanding the SDM Templates 8-1
Dual IPv4 and IPv6 SDM Templates 8-2
Configuring the Switch SDM Template 8-3
Default SDM Template 8-3
SDM Template Configuration Guidelines 8-3
Setting the SDM Template 8-4
Displaying the SDM Templates 8-5
CHAPTER
9 Configuring Switch-Based Authentication 9-1
Preventing Unauthorized Access to Your Switch 9-1
Protecting Access to Privileged EXEC Commands 9-2
Default Password and Privilege Level Configuration 9-2
Setting or Changing a Static Enable Password 9-3
Protecting Enable and Enable Secret Passwords with Encryption 9-3
Contents
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Disabling Password Recovery 9-5
Setting a Telnet Password for a Terminal Line 9-6
Configuring Username and Password Pairs 9-6
Configuring Multiple Privilege Levels 9-7
Setting the Privilege Level for a Command 9-8
Changing the Default Privilege Level for Lines 9-9
Logging into and Exiting a Privilege Level 9-9
Controlling Switch Access with TACACS+ 9-10
Understanding TACACS+ 9-10
TACACS+ Operation 9-12
Configuring TACACS+ 9-12
Default TACACS+ Configuration 9-13
Identifying the TACACS+ Server Host and Setting the Authentication Key 9-13
Configuring TACACS+ Login Authentication 9-14
Configuring TACACS+ Authorization for Privileged EXEC Access and Network Services 9-16
Starting TACACS+ Accounting 9-17
Displaying the TACACS+ Configuration 9-17
Controlling Switch Access with RADIUS 9-17
Understanding RADIUS 9-18
RADIUS Operation 9-19
Configuring RADIUS 9-19
Default RADIUS Configuration 9-20
Identifying the RADIUS Server Host 9-20
Configuring RADIUS Login Authentication 9-23
Defining AAA Server Groups 9-25
Configuring RADIUS Authorization for User Privileged Access and Network Services 9-27
Starting RADIUS Accounting 9-28
Configuring Settings for All RADIUS Servers 9-29
Configuring the Switch to Use Vendor-Specific RADIUS Attributes 9-29
Configuring the Switch for Vendor-Proprietary RADIUS Server Communication 9-31
Configuring RADIUS Server Load Balancing 9-31
Displaying the RADIUS Configuration 9-32
Controlling Switch Access with Kerberos 9-32
Understanding Kerberos 9-32
Kerberos Operation 9-34
Authenticating to a Boundary Switch 9-35
Obtaining a TGT from a KDC 9-35
Authenticating to Network Services 9-35
Configuring Kerberos 9-35
Contents
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Configuring the Switch for Local Authentication and Authorization 9-36
Configuring the Switch for Secure Shell 9-37
Understanding SSH 9-38
SSH Servers, Integrated Clients, and Supported Versions 9-38
Limitations 9-39
Configuring SSH 9-39
Configuration Guidelines 9-39
Setting Up the Switch to Run SSH 9-39
Configuring the SSH Server 9-40
Displaying the SSH Configuration and Status 9-41
Configuring the Switch for Secure Socket Layer HTTP 9-42
Understanding Secure HTTP Servers and Clients 9-42
Certificate Authority Trustpoints 9-42
CipherSuites 9-44
Configuring Secure HTTP Servers and Clients 9-44
Default SSL Configuration 9-45
SSL Configuration Guidelines 9-45
Configuring a CA Trustpoint 9-45
Configuring the Secure HTTP Server 9-46
Configuring the Secure HTTP Client 9-47
Displaying Secure HTTP Server and Client Status 9-48
Configuring the Switch for Secure Copy Protocol 9-48
Information About Secure Copy 9-49
CHAPTER
10 Configuring IEEE 802.1x Port-Based Authentication 10-1
Understanding IEEE 802.1x Port-Based Authentication 10-1
Device Roles 10-2
Authentication Process 10-3
Authentication Initiation and Message Exchange 10-5
Authentication Manager 10-7
Port-Based Authentication Methods 10-7
Per-User ACLs and Filter-Ids 10-8
Authentication Manager CLI Commands 10-8
Ports in Authorized and Unauthorized States 10-9
802.1x Host Mode 10-10
Multidomain Authentication 10-11
802.1x Multiple Authentication Mode 10-12
802.1x Accounting 10-12
802.1x Accounting Attribute-Value Pairs 10-13
Contents
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802.1x Readiness Check 10-14
802.1x Authentication with VLAN Assignment 10-14
Using 802.1x Authentication with Per-User ACLs 10-15
802.1x Authentication with Downloadable ACLs and Redirect URLs 10-16
Cisco Secure ACS and Attribute-Value Pairs for the Redirect URL 10-17
Cisco Secure ACS and Attribute-Value Pairs for Downloadable ACLs 10-17
802.1x Authentication with Guest VLAN 10-17
802.1x Authentication with Restricted VLAN 10-18
802.1x Authentication with Inaccessible Authentication Bypass 10-19
802.1x Authentication with Voice VLAN Ports 10-21
802.1x Authentication with Port Security 10-21
802.1x Authentication with Wake-on-LAN 10-22
802.1x Authentication with MAC Authentication Bypass 10-23
Network Admission Control Layer 2 802.1x Validation 10-24
Flexible Authentication Ordering 10-24
Open1x Authentication 10-25
Using Voice Aware 802.1x Security 10-25
802.1x Switch Supplicant with Network Edge Access Topology (NEAT) 10-25
Web Authentication 10-26
Web Authentication with Automatic MAC Check 10-27
Local Web Authentication Banner 10-27
Configuring 802.1x Authentication 10-29
Default 802.1x Authentication Configuration 10-30
802.1x Authentication Configuration Guidelines 10-31
802.1x Authentication 10-31
VLAN Assignment, Guest VLAN, Restricted VLAN, and Inaccessible Authentication
Bypass 10-32
MAC Authentication Bypass 10-33
Maximum Number of Allowed Devices Per Port 10-33
Configuring 802.1x Readiness Check 10-34
Configuring Voice Aware 802.1x Security 10-35
Configuring 802.1x Violation Modes 10-36
Configuring 802.1x Authentication 10-37
Configuring the Switch-to-RADIUS-Server Communication 10-38
Configuring the Host Mode 10-40
Configuring Periodic Re-Authentication 10-41
Manually Re-Authenticating a Client Connected to a Port 10-42
Changing the Quiet Period 10-42
Changing the Switch-to-Client Retransmission Time 10-43
Setting the Switch-to-Client Frame-Retransmission Number 10-44
Contents
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Setting the Re-Authentication Number 10-44
Configuring 802.1x Accounting 10-45
Configuring a Guest VLAN 10-46
Configuring a Restricted VLAN 10-47
Configuring the Inaccessible Authentication Bypass Feature 10-49
Configuring 802.1x Authentication with WoL 10-52
Configuring MAC Authentication Bypass 10-53
Configuring NAC Layer 2 802.1x Validation 10-54
Configuring 802.1x Switch Supplicant with NEAT 10-55
Configuring 802.1x Authentication with Downloadable ACLs and Redirect URLs 10-57
Configuring Downloadable ACLs 10-57
Configuring a Downloadable Policy 10-58
Configuring Flexible Authentication Ordering 10-59
Configuring Open1x 10-60
Configuring Web Authentication 10-60
Configuring a Web Authentication Local Banner 10-64
Disabling 802.1x Authentication on the Port 10-64
Resetting the 802.1x Authentication Configuration to the Default Values 10-65
Displaying 802.1x Statistics and Status 10-65
CHAPTER
11 Configuring Interface Characteristics 11-1
Understanding Interface Types 11-1
Port-Based VLANs 11-2
Switch Ports 11-2
Access Ports 11-3
Trunk Ports 11-3
Tunnel Ports 11-3
Routed Ports 11-4
Switch Virtual Interfaces 11-4
SVI Autostate Exclude 11-5
EtherChannel Port Groups 11-6
Dual-Purpose Uplink Ports 11-6
Power over Ethernet Ports 11-7
Supported Protocols and Standards 11-7
Powered-Device Detection and Initial Power Allocation 11-7
Power Management Modes 11-8
Connecting Interfaces 11-9
Contents
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Using Interface Configuration Mode 11-10
Procedures for Configuring Interfaces 11-11
Configuring a Range of Interfaces 11-11
Configuring and Using Interface Range Macros 11-13
Configuring Ethernet Interfaces 11-14
Default Ethernet Interface Configuration 11-15
Setting the Type of a Dual-Purpose Uplink Port 11-16
Configuring Interface Speed and Duplex Mode 11-17
Speed and Duplex Configuration Guidelines 11-18
Setting the Interface Speed and Duplex Parameters 11-18
Configuring IEEE 802.3x Flow Control 11-20
Configuring Auto-MDIX on an Interface 11-21
Configuring a Power Management Mode on a PoE Port 11-22
Budgeting Power for Devices Connected to a PoE Port 11-23
Adding a Description for an Interface 11-24
Configuring Layer 3 Interfaces 11-25
Configuring SVI Autostate Exclude 11-27
Configuring the System MTU 11-27
Monitoring and Maintaining the Interfaces 11-29
Monitoring Interface Status 11-29
Clearing and Resetting Interfaces and Counters 11-30
Shutting Down and Restarting the Interface 11-31
CHAPTER
12 Configuring Auto Smartports Macros 12-1
Understanding Auto Smartports and Static Smartports Macros 12-1
Configuring Auto Smartports 12-2
Default Auto Smartports Configuration 12-2
Auto Smartports Configuration Guidelines 12-3
Enabling Auto Smartports 12-3
Configuring Auto Smartports Built-in Macros 12-4
Configuring Event Triggers 12-6
Configuring Auto Smartports User-Defined Macros 12-9
Configuring Static Smartports Macros 12-11
Default Static Smartports Configuration 12-11
Static Smartports Configuration Guidelines 12-12
Applying Static Smartports Macros 12-12
Displaying Auto Smartports and Static Smartports Macros 12-14
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CHAPTER
13 Configuring VLANs 13-1
Understanding VLANs 13-1
Supported VLANs 13-2
VLAN Port Membership Modes 13-3
Configuring Normal-Range VLANs 13-4
Token Ring VLANs 13-6
Normal-Range VLAN Configuration Guidelines 13-6
VLAN Configuration Mode Options 13-7
VLAN Configuration in config-vlan Mode 13-7
VLAN Configuration in VLAN Database Configuration Mode 13-7
Saving VLAN Configuration 13-7
Default Ethernet VLAN Configuration 13-8
Creating or Modifying an Ethernet VLAN 13-9
Deleting a VLAN 13-10
Assigning Static-Access Ports to a VLAN 13-11
Configuring Extended-Range VLANs 13-12
Default VLAN Configuration 13-12
Extended-Range VLAN Configuration Guidelines 13-13
Creating an Extended-Range VLAN 13-13
Creating an Extended-Range VLAN with an Internal VLAN ID 13-15
Displaying VLANs 13-16
Configuring VLAN Trunks 13-16
Trunking Overview 13-16
Encapsulation Types 13-18
IEEE 802.1Q Configuration Considerations 13-19
Default Layer 2 Ethernet Interface VLAN Configuration 13-19
Configuring an Ethernet Interface as a Trunk Port 13-19
Interaction with Other Features 13-20
Configuring a Trunk Port 13-20
Defining the Allowed VLANs on a Trunk 13-21
Changing the Pruning-Eligible List 13-23
Configuring the Native VLAN for Untagged Traffic 13-23
Configuring Trunk Ports for Load Sharing 13-24
Load Sharing Using STP Port Priorities 13-24
Load Sharing Using STP Path Cost 13-26
Configuring VMPS 13-27
Understanding VMPS 13-28
Dynamic-Access Port VLAN Membership 13-28
Default VMPS Client Configuration 13-29
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VMPS Configuration Guidelines 13-29
Configuring the VMPS Client 13-30
Entering the IP Address of the VMPS 13-30
Configuring Dynamic-Access Ports on VMPS Clients 13-30
Reconfirming VLAN Memberships 13-31
Changing the Reconfirmation Interval 13-31
Changing the Retry Count 13-32
Monitoring the VMPS 13-32
Troubleshooting Dynamic-Access Port VLAN Membership 13-33
VMPS Configuration Example 13-33
CHAPTER
15 Configuring Voice VLAN 15-1
Understanding Voice VLAN 15-1
Cisco IP Phone Voice Traffic 15-2
Cisco IP Phone Data Traffic 15-2
Configuring Voice VLAN 15-3
Default Voice VLAN Configuration 15-3
Voice VLAN Configuration Guidelines 15-3
Configuring a Port Connected to a Cisco 7960 IP Phone 15-4
Configuring Cisco IP Phone Voice Traffic 15-5
Configuring the Priority of Incoming Data Frames 15-6
Displaying Voice VLAN 15-7
CHAPTER
16 Configuring VTP 16-1
Understanding VTP 16-1
The VTP Domain 16-2
VTP Modes 16-3
VTP Advertisements 16-3
VTP Version 2 16-4
VTP Pruning 16-4
Configuring VTP 16-6
Default VTP Configuration 16-6
VTP Configuration Options 16-7
VTP Configuration in Global Configuration Mode 16-7
VTP Configuration in VLAN Database Configuration Mode 16-7
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VTP Configuration Guidelines 16-8
Domain Names 16-8
Passwords 16-8
VTP Version 16-8
Configuration Requirements 16-9
Configuring a VTP Server 16-9
Configuring a VTP Client 16-11
Disabling VTP (VTP Transparent Mode) 16-12
Enabling VTP Version 2 16-13
Enabling VTP Pruning 16-14
Adding a VTP Client Switch to a VTP Domain 16-14
Monitoring VTP 16-16
CHAPTER
14 Configuring Private VLANs 14-1
Understanding Private VLANs 14-1
IP Addressing Scheme with Private VLANs 14-3
Private VLANs across Multiple Switches 14-4
Private-VLAN Interaction with Other Features 14-4
Private VLANs and Unicast, Broadcast, and Multicast Traffic 14-5
Private VLANs and SVIs 14-5
Configuring Private VLANs 14-5
Tasks for Configuring Private VLANs 14-6
Default Private-VLAN Configuration 14-6
Private-VLAN Configuration Guidelines 14-6
Secondary and Primary VLAN Configuration 14-6
Private-VLAN Port Configuration 14-8
Limitations with Other Features 14-8
Configuring and Associating VLANs in a Private VLAN 14-9
Configuring a Layer 2 Interface as a Private-VLAN Host Port 14-11
Configuring a Layer 2 Interface as a Private-VLAN Promiscuous Port 14-12
Mapping Secondary VLANs to a Primary VLAN Layer 3 VLAN Interface 14-13
Monitoring Private VLANs 14-14
CHAPTER
16 Configuring IEEE 802.1Q and Layer 2 Protocol Tunneling 16-1
Understanding IEEE 802.1Q Tunneling 16-1
Configuring IEEE 802.1Q Tunneling 16-4
Default IEEE 802.1Q Tunneling Configuration 16-4
IEEE 802.1Q Tunneling Configuration Guidelines 16-4
Native VLANs 16-4
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System MTU 16-5
IEEE 802.1Q Tunneling and Other Features 16-6
Configuring an IEEE 802.1Q Tunneling Port 16-6
Understanding Layer 2 Protocol Tunneling 16-7
Configuring Layer 2 Protocol Tunneling 16-10
Default Layer 2 Protocol Tunneling Configuration 16-11
Layer 2 Protocol Tunneling Configuration Guidelines 16-11
Configuring Layer 2 Protocol Tunneling 16-12
Configuring Layer 2 Tunneling for EtherChannels 16-14
Configuring the SP Edge Switch 16-14
Configuring the Customer Switch 16-15
Monitoring and Maintaining Tunneling Status 16-17
CHAPTER
17 Configuring STP 17-1
Understanding Spanning-Tree Features 17-1
STP Overview 17-2
Spanning-Tree Topology and BPDUs 17-3
Bridge ID, Switch Priority, and Extended System ID 17-4
Spanning-Tree Interface States 17-4
Blocking State 17-5
Listening State 17-6
Learning State 17-6
Forwarding State 17-6
Disabled State 17-7
How a Switch or Port Becomes the Root Switch or Root Port 17-7
Spanning Tree and Redundant Connectivity 17-8
Spanning-Tree Address Management 17-8
Accelerated Aging to Retain Connectivity 17-8
Spanning-Tree Modes and Protocols 17-9
Supported Spanning-Tree Instances 17-9
Spanning-Tree Interoperability and Backward Compatibility 17-10
STP and IEEE 802.1Q Trunks 17-10
VLAN-Bridge Spanning Tree 17-10
Configuring Spanning-Tree Features 17-11
Default Spanning-Tree Configuration 17-11
Spanning-Tree Configuration Guidelines 17-12
Changing the Spanning-Tree Mode. 17-13
Disabling Spanning Tree 17-14
Configuring the Root Switch 17-14
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Configuring a Secondary Root Switch 17-16
Configuring Port Priority 17-17
Configuring Path Cost 17-18
Configuring the Switch Priority of a VLAN 17-19
Configuring Spanning-Tree Timers 17-20
Configuring the Hello Time 17-20
Configuring the Forwarding-Delay Time for a VLAN 17-21
Configuring the Maximum-Aging Time for a VLAN 17-21
Configuring the Transmit Hold-Count 17-22
Displaying the Spanning-Tree Status 17-22
CHAPTER
18 Configuring MSTP 18-1
Understanding MSTP 18-2
Multiple Spanning-Tree Regions 18-2
IST, CIST, and CST 18-2
Operations Within an MST Region 18-3
Operations Between MST Regions 18-3
IEEE 802.1s Terminology 18-5
Hop Count 18-5
Boundary Ports 18-6
IEEE 802.1s Implementation 18-6
Port Role Naming Change 18-6
Interoperation Between Legacy and Standard Switches 18-7
Detecting Unidirectional Link Failure 18-7
Interoperability with IEEE 802.1D STP 18-8
Understanding RSTP 18-8
Port Roles and the Active Topology 18-9
Rapid Convergence 18-10
Synchronization of Port Roles 18-11
Bridge Protocol Data Unit Format and Processing 18-12
Processing Superior BPDU Information 18-13
Processing Inferior BPDU Information 18-13
Topology Changes 18-13
Configuring MSTP Features 18-14
Default MSTP Configuration 18-14
MSTP Configuration Guidelines 18-15
Specifying the MST Region Configuration and Enabling MSTP 18-16
Configuring the Root Switch 18-17
Configuring a Secondary Root Switch 18-18
Contents
xix
Catalyst 3560 Switch Software Configuration Guide
OL-8553-06
Configuring Port Priority 18-19
Configuring Path Cost 18-20
Configuring the Switch Priority 18-21
Configuring the Hello Time 18-22
Configuring the Forwarding-Delay Time 18-23
Configuring the Maximum-Aging Time 18-23
Configuring the Maximum-Hop Count 18-24
Specifying the Link Type to Ensure Rapid Transitions 18-24
Designating the Neighbor Type 18-25
Restarting the Protocol Migration Process 18-25
Displaying the MST Configuration and Status 18-26
CHAPTER
19 Configuring Optional Spanning-Tree Features 19-1
Understanding Optional Spanning-Tree Features 19-1
Understanding Port Fast 19-2
Understanding BPDU Guard 19-2
Understanding BPDU Filtering 19-3
Understanding UplinkFast 19-3
Understanding BackboneFast 19-5
Understanding EtherChannel Guard 19-7
Understanding Root Guard 19-8
Understanding Loop Guard 19-9
Configuring Optional Spanning-Tree Features 19-9
Default Optional Spanning-Tree Configuration 19-9
Optional Spanning-Tree Configuration Guidelines 19-10
Enabling Port Fast 19-10
Enabling BPDU Guard 19-11
Enabling BPDU Filtering 19-12
Enabling UplinkFast for Use with Redundant Links 19-13
Enabling BackboneFast 19-13
Enabling EtherChannel Guard 19-14
Enabling Root Guard 19-15
Enabling Loop Guard 19-15
Displaying the Spanning-Tree Status 19-16
CHAPTER
20 Configuring Flex Links and the MAC Address-Table Move Update Feature 20-1
Understanding Flex Links and the MAC Address-Table Move Update 20-1
Flex Links 20-1
VLAN Flex Link Load Balancing and Support 20-2
Contents
xx
Catalyst 3560 Switch Software Configuration Guide
OL-8553-06
Flex Link Multicast Fast Convergence 20-3
Learning the Other Flex Link Port as the mrouter Port 20-3
Generating IGMP Reports 20-3
Leaking IGMP Reports 20-4
Configuration Examples 20-4
MAC Address-Table Move Update 20-6
Configuring Flex Links and the MAC Address-Table Move Update 20-7
Default Configuration 20-8
Configuration Guidelines 20-8
Configuring Flex Links 20-9
Configuring VLAN Load Balancing on Flex Links 20-11
Configuring the MAC Address-Table Move Update Feature 20-12
Monitoring Flex Links and the MAC Address-Table Move Update 20-14
CHAPTER
21 Configuring DHCP Features and IP Source Guard 21-1
Understanding DHCP Snooping 21-1
DHCP Server 21-2
DHCP Relay Agent 21-2
DHCP Snooping 21-2
Option-82 Data Insertion 21-3
Cisco IOS DHCP Server Database 21-6
DHCP Snooping Binding Database 21-6
Configuring DHCP Snooping 21-8
Default DHCP Snooping Configuration 21-8
DHCP Snooping Configuration Guidelines 21-9
Configuring the DHCP Server 21-10
Configuring the DHCP Relay Agent 21-10
Specifying the Packet Forwarding Address 21-10
Enabling DHCP Snooping and Option 82 21-12
Enabling DHCP Snooping on Private VLANs 21-13
Enabling the Cisco IOS DHCP Server Database 21-14
Enabling the DHCP Snooping Binding Database Agent 21-14
Displaying DHCP Snooping Information 21-15
Understanding IP Source Guard 21-15
Source IP Address Filtering 21-16
Source IP and MAC Address Filtering 21-16
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Cisco Catalyst 3560V2-24DC Switch User manual

Category
Software
Type
User manual

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