Cisco 3845 - Security Bundle Router Software Manual

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Cisco ME 3800X and 3600X Switch

Software Configuration Guide

Cisco IOS Release 12.2(52)EY

October 2010

Text Part Number: OL-23400-01

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Cisco ME 3800X and 3600X Switch Software Configuration Guide

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CONTENTS

Preface xxxv

Audience xxxv

Purpose xxxv

Conventions xxxv

Related Publications xxxvi

Obtaining Documentation and Submitting a Service Request xxxvii

CHAPTER

1 Overview 1-1

Software Licenses and Features 1-1

Features 1-2

Performance Features 1-2

Management Options 1-3

Manageability Features 1-3

Availability Features 1-5

VLAN Features 1-5

Security Features 1-6

Switch Security 1-6

Network Security 1-6

Quality of Service and Class of Service Features 1-7

Layer 2 Virtual Private Network Services 1-7

Layer 3 Features 1-8

Layer 3 VPN Services 1-8

Monitoring Features 1-9

Feature Support per License 1-9

Where to Go Next 1-11

CHAPTER

2 Using 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 of Commands 2-4

Understanding CLI Error Messages 2-4

Using Command History 2-4

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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

CHAPTER

3 Assigning the Switch IP Address and Default Gateway 3-1

Understanding the Boot Process 3-1

Initial Configuration 3-2

Assigning Switch Information 3-3

Default Switch Information 3-3

Understanding DHCP-Based Autoconfiguration 3-4

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 3-6

Configuring DHCP-Based Autoconfiguration 3-6

DHCP Server Configuration Guidelines 3-7

Configuring the TFTP Server 3-7

Configuring the DNS 3-8

Configuring the Relay Device 3-8

Obtaining Configuration Files 3-9

Example Configuration 3-10

Configuring the DHCP Auto Configuration and Image Update Features 3-11

Configuring DHCP Autoconfiguration (Only Configuration File) 3-12

Configuring DHCP Auto-Image Update (Configuration File and Image) 3-13

Configuring the Client 3-14

Manually Assigning IP Information 3-15

Checking and Saving the Running Configuration 3-16

Modifying the Startup Configuration 3-17

Default Boot Configuration 3-18

Automatically Downloading a Configuration File 3-18

Specifying the Filename to Read and Write the System Configuration 3-18

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Booting Manually 3-19

Booting 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

4 Configuring Cisco IOS Configuration Engine 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 4-7

Enabling the Cisco IOS CNS Agent 4-8

Enabling an Initial Configuration 4-9

Enabling a Partial Configuration 4-12

Upgrading Devices with Cisco IOS Image Agent 4-13

Prerequisites for the CNS Image Agent 4-13

Restrictions for the CNS Image Agent 4-13

Displaying CNS Configuration 4-14

CHAPTER

5 Administering 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

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Configuring NTP Associations 5-5

Configuring NTP Broadcast Service 5-6

Configuring NTP Access Restrictions 5-8

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 5-21

Configuring MAC Address Change Notification Traps 5-22

Configuring MAC Address Move Notification Traps 5-24

Configuring MAC Threshold Notification Traps 5-25

Adding and Removing Static Address Entries 5-26

Configuring Unicast MAC Address Filtering 5-27

Disabling MAC Address Learning on a VLAN 5-28

Displaying Address Table Entries 5-29

Managing the ARP Table 5-30

CHAPTER

6 Configuring Synchronous Ethernet 6-1

Understanding SyncE 6-1

Reference Clocks 6-1

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SyncE Timing Using REP for Loop Prevention and Resiliency 6-2

BITS Interface 6-5

Configuring SyncE 6-5

Default SyncE Configuration 6-6

Configuring the Network Clock Selection 6-6

Configuring the BITS Interface 6-7

Selecting the Network Clock 6-9

Configuring REP for the SyncE Network 6-10

Monitoring SyncE 6-11

CHAPTER

7 Configuring the Switch External Alarms 7-1

Understanding Switch Alarms 7-1

Configuring Switch Alarms 7-2

CHAPTER

8 Configuring 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 8-3

Disabling Password Recovery 8-5

Setting a Telnet Password for a Terminal Line 8-6

Configuring Username and Password Pairs 8-6

Configuring Multiple Privilege Levels 8-7

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 8-9

Controlling Switch Access with TACACS+ 8-10

Understanding TACACS+ 8-10

TACACS+ Operation 8-12

Configuring TACACS+ 8-12

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 8-16

Displaying the TACACS+ Configuration 8-17

Controlling Switch Access with RADIUS 8-17

Understanding RADIUS 8-17

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RADIUS Operation 8-19

Configuring RADIUS 8-19

Default RADIUS Configuration 8-20

Identifying the RADIUS Server Host 8-20

Configuring RADIUS Login Authentication 8-22

Defining AAA Server Groups 8-24

Configuring RADIUS Authorization for User Privileged Access and Network Services 8-26

Starting RADIUS Accounting 8-27

Configuring Settings for All RADIUS Servers 8-28

Configuring the Switch to Use Vendor-Specific RADIUS Attributes 8-28

Configuring the Switch for Vendor-Proprietary RADIUS Server Communication 8-29

Configuring RADIUS Server Load Balancing 8-30

Displaying the RADIUS Configuration 8-30

Controlling Switch Access with Kerberos 8-31

Understanding Kerberos 8-31

Kerberos Operation 8-33

Authenticating to a Boundary Switch 8-33

Obtaining a TGT from a KDC 8-34

Authenticating to Network Services 8-34

Configuring Kerberos 8-34

Configuring the Switch for Local Authentication and Authorization 8-35

Configuring the Switch for Secure Shell 8-36

Understanding SSH 8-36

SSH Servers, Integrated Clients, and Supported Versions 8-36

Limitations 8-37

Configuring SSH 8-37

Configuration Guidelines 8-37

Setting Up the Switch to Run SSH 8-37

Configuring the SSH Server 8-38

Displaying the SSH Configuration and Status 8-39

Configuring the Switch for Secure Copy Protocol 8-39

Information About Secure Copy 8-40

CHAPTER

9 Configuring Interfaces 9-1

Understanding Interface Types 9-1

NNI Port Type 9-2

Port-Based VLANs 9-2

Switch Ports 9-2

Access Ports 9-3

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Trunk Ports 9-3

Routed Ports 9-3

Ethernet Management Port 9-4

Switch Virtual Interfaces 9-4

EtherChannel Port Groups 9-4

Ethernet Flow Points 9-5

Connecting Interfaces 9-5

Using Interface Configuration Mode 9-6

Procedures for Configuring Interfaces 9-6

Configuring a Range of Interfaces 9-7

Configuring and Using Interface Range Macros 9-8

Using the Ethernet Management Port 9-10

Understanding the Ethernet Management Port 9-10

Supported Features on the Ethernet Management Port 9-12

Configuring the Ethernet Management Port 9-12

TFTP and the Ethernet Management Port 9-12

Configuring Ethernet Interfaces 9-13

Default Ethernet Interface Configuration 9-13

Configuring Interface Speed and Duplex Mode 9-14

Speed and Duplex Configuration Guidelines 9-14

Setting the Interface Speed and Duplex Parameters 9-15

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 Interface MTU 9-21

Monitoring and Maintaining the Interfaces 9-21

Monitoring Interface Status 9-21

Clearing and Resetting Interfaces and Counters 9-23

Shutting Down and Restarting the Interface 9-23

CHAPTER

10 Configuring VLANs 10-1

Understanding VLANs 10-1

Supported VLANs 10-3

Normal-Range VLANs 10-3

Extended-Range VLANs 10-4

VLAN Port Membership Modes 10-4

UNI VLANs 10-4

Creating and Modifying VLANs 10-5

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Default Ethernet VLAN Configuration 10-5

VLAN Configuration Guidelines 10-6

Creating or Modifying an Ethernet VLAN 10-7

Assigning Static-Access Ports to a VLAN 10-8

Displaying VLANs 10-9

Configuring VLAN Trunks 10-9

Trunking Overview 10-9

IEEE 802.1Q Configuration Considerations 10-10

Default Layer 2 Ethernet Interface VLAN Configuration 10-10

Configuring an Ethernet Interface as a Trunk Port 10-11

Interaction with EtherChannels 10-11

Configuring a Trunk Port 10-11

Defining the Allowed VLANs on a Trunk 10-12

Configuring the Native VLAN for Untagged Traffic 10-13

Configuring Trunk Ports for Load Sharing 10-14

Load Sharing Using STP Port Priorities 10-14

Load Sharing Using STP Path Cost 10-15

CHAPTER

11 Configuring Ethernet Virtual Connections (EVCs) 11-1

Supported EVC Features 11-2

Understanding EVC Features 11-3

Ethernet Virtual Connections 11-3

Service Instances and EFPs 11-3

Encapsulation 11-4

Bridge Domains 11-6

Split-Horizon 11-6

Rewrite Operations 11-7

Configuring EFPs 11-8

Default EVC Configuration 11-8

Configuration Guidelines 11-8

Creating Service Instances 11-9

Configuration Examples 11-10

Configuring a Service Instance 11-10

Encapsulation Using a VLAN Range 11-10

Two Service Instances Joining the Same Bridge Domain 11-10

Bridge Domains and VLAN Encapsulation 11-11

Rewrite 11-11

Split Horizon 11-11

Hairpinning 11-12

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Egress Filtering 11-12

Examples of Unsupported Configurations 11-13

Overlapping Encapsulation 11-13

Global Rewrite Operation Limitation on a Switch 11-14

Configuring Other Features on EFPs 11-15

EFPs and EtherChannels 11-15

EFPs and Layer 2 Protocols 11-16

MAC Address Forwarding, Learning and Aging on EFPs 11-16

Configuring IEEE 802.1Q Tunneling and Layer 2 Protocol Tunneling using EFPs 11-17

802.1Q Tunneling (QinQ) 11-17

Layer 2 Protocol Tunneling 11-21

EFPs and Ethernet over Multiprotocol Layer Switching (EoMPLS) 11-24

Bridge Domain Routing 11-24

EFPs and Switchport MAC Addresses 11-25

EVC and Switchports 11-25

EFPs and MSTP 11-29

Monitoring EVC 11-29

CHAPTER

12 Configuring Command Macros 12-1

Understanding Command Macros 12-1

Configuring Command Macros 12-1

Default Command Macro Configuration 12-2

Command Macro Configuration Guidelines 12-2

Creating Command Macros 12-3

Applying Command Macros 12-4

Displaying Command Macros 12-5

CHAPTER

13 Configuring STP 13-1

Understanding Spanning-Tree Features 13-1

STP Overview 13-2

Spanning-Tree Topology and BPDUs 13-2

Bridge ID, Switch Priority, and Extended System ID 13-3

Spanning-Tree Interface States 13-4

Blocking State 13-5

Listening State 13-6

Learning State 13-6

Forwarding State 13-6

Disabled State 13-6

How a Switch or Port Becomes the Root Switch or Root Port 13-7

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Spanning Tree and Redundant Connectivity 13-7

Spanning-Tree Address Management 13-8

Accelerated Aging to Retain Connectivity 13-8

Spanning-Tree Modes and Protocols 13-9

Supported Spanning-Tree Instances 13-9

Spanning-Tree Interoperability and Backward Compatibility 13-10

STP and IEEE 802.1Q Trunks 13-10

Configuring Spanning-Tree Features 13-10

Default Spanning-Tree Configuration 13-11

Spanning-Tree Configuration Guidelines 13-11

Changing the Spanning-Tree Mode. 13-12

Disabling Spanning Tree 13-13

Configuring the Root Switch 13-14

Configuring a Secondary Root Switch 13-15

Configuring Port Priority 13-16

Configuring Path Cost 13-18

Configuring the Switch Priority of a VLAN 13-19

Configuring Spanning-Tree Timers 13-20

Configuring the Hello Time 13-20

Configuring the Forwarding-Delay Time for a VLAN 13-21

Configuring the Maximum-Aging Time for a VLAN 13-21

Displaying the Spanning-Tree Status 13-22

CHAPTER

14 Configuring MSTP 14-1

Understanding MSTP 14-2

Multiple Spanning-Tree Regions 14-2

IST, CIST, and CST 14-2

Operations Within an MST Region 14-3

Operations Between MST Regions 14-3

IEEE 802.1s Terminology 14-5

Hop Count 14-5

Boundary Ports 14-6

IEEE 802.1s Implementation 14-6

Port Role Naming Change 14-6

Interoperation Between Legacy and Standard Switches 14-7

Detecting Unidirectional Link Failure 14-7

Interoperability with IEEE 802.1D STP 14-8

Understanding RSTP 14-8

Port Roles and the Active Topology 14-9

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Rapid Convergence 14-9

Synchronization of Port Roles 14-11

Bridge Protocol Data Unit Format and Processing 14-12

Processing Superior BPDU Information 14-13

Processing Inferior BPDU Information 14-13

Topology Changes 14-13

Configuring MSTP Features 14-14

Default MSTP Configuration 14-14

MSTP Configuration Guidelines 14-15

Specifying the MST Region Configuration and Enabling MSTP 14-16

Configuring the Root Switch 14-17

Configuring a Secondary Root Switch 14-18

Configuring Port Priority 14-19

Configuring Path Cost 14-21

Configuring the Switch Priority 14-22

MSTP and Ethernet Flow Points (EFPs) 14-23

Configuring the Hello Time 14-23

Configuring the Forwarding-Delay Time 14-23

Configuring the Maximum-Aging Time 14-24

Configuring the Maximum-Hop Count 14-24

Specifying the Link Type to Ensure Rapid Transitions 14-25

Designating the Neighbor Type 14-26

Restarting the Protocol Migration Process 14-26

Displaying the MST Configuration and Status 14-27

CHAPTER

15 Configuring Optional Spanning-Tree Features 15-1

Understanding Optional Spanning-Tree Features 15-1

Understanding Port Fast 15-2

Understanding BPDU Guard 15-2

Understanding BPDU Filtering 15-3

Understanding EtherChannel Guard 15-3

Understanding Root Guard 15-3

Understanding Loop Guard 15-4

Configuring Optional Spanning-Tree Features 15-5

Default Optional Spanning-Tree Configuration 15-5

Optional Spanning-Tree Configuration Guidelines 15-5

Enabling Port Fast 15-5

Enabling BPDU Guard 15-6

Enabling BPDU Filtering 15-7

Enabling EtherChannel Guard 15-8

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Enabling Root Guard 15-9

Enabling Loop Guard 15-9

Displaying the Spanning-Tree Status 15-10

CHAPTER

16 Configuring Resilient Ethernet Protocol 16-1

Understanding REP 16-1

Link Integrity 16-3

Fast Convergence 16-4

VLAN Load Balancing 16-4

Spanning Tree Interaction 16-6

REP Ports 16-6

Configuring REP 16-6

Default REP Configuration 16-7

REP Configuration Guidelines 16-7

Configuring the REP Administrative VLAN 16-8

Configuring REP Interfaces 16-9

Setting Manual Preemption for VLAN Load Balancing 16-13

Configuring SNMP Traps for REP 16-13

Monitoring REP 16-14

CHAPTER

17 Configuring Flex Links and the MAC Address-Table Move Update Feature 17-1

Understanding Flex Links and the MAC Address-Table Move Update 17-1

Flex Links 17-1

VLAN Flex Link Load Balancing and Support 17-2

Flex Link Multicast Fast Convergence 17-3

Learning the Other Flex Link Port as the mrouter Port 17-3

Generating IGMP Reports 17-3

Leaking IGMP Reports 17-4

MAC Address-Table Move Update 17-6

Configuring Flex Links and MAC Address-Table Move Update 17-7

Default Configuration 17-7

Configuration Guidelines 17-8

Configuring Flex Links 17-8

Configuring VLAN Load Balancing on Flex Links 17-10

Configuring the MAC Address-Table Move Update Feature 17-11

Monitoring Flex Links and the MAC Address-Table Move Update 17-13

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CHAPTER

18 Configuring IGMP Snooping 18-1

Understanding IGMP Snooping 18-1

IGMP Versions 18-2

Joining a Multicast Group 18-3

Leaving a Multicast Group 18-4

Immediate Leave 18-5

IGMP Configurable-Leave Timer 18-5

IGMP Report Suppression 18-5

Configuring IGMP Snooping 18-6

Default IGMP Snooping Configuration 18-6

Enabling or Disabling IGMP Snooping 18-6

Configuring a Multicast Router Port 18-7

Configuring a Host Statically to Join a Group 18-8

Enabling IGMP Immediate Leave 18-8

Configuring the IGMP Leave Timer 18-9

Configuring TCN-Related Commands 18-10

Controlling the Multicast Flooding Time After a TCN Event 18-10

Recovering from Flood Mode 18-10

Disabling Multicast Flooding During a TCN Event 18-11

Disabling IGMP Report Suppression 18-12

Displaying IGMP Snooping Information 18-12

Configuring IGMP Filtering and Throttling 18-13

Default IGMP Filtering and Throttling Configuration 18-14

Configuring IGMP Profiles 18-14

Applying IGMP Profiles 18-15

Setting the Maximum Number of IGMP Groups 18-16

Configuring the IGMP Throttling Action 18-17

Displaying IGMP Filtering and Throttling Configuration 18-18

CHAPTER

19 Configuring Traffic Control 19-1

Configuring Storm Control 19-1

Understanding Storm Control 19-1

Default Storm Control Configuration 19-3

Configuring Storm Control and Threshold Levels 19-3

Configuring Port Blocking 19-5

Default Port Blocking Configuration 19-5

Blocking Flooded Traffic on an Interface 19-5

Configuring EVC MAC Security 19-6

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Understanding MAC Security 19-7

Secure MAC Addresses 19-7

Security Violations 19-7

Default EVC MAC Security Configuration 19-8

MAC Address Security Guidelines 19-9

Enabling and Configuring EVC MAC Security 19-9

Displaying Traffic Control Settings 19-12

CHAPTER

20 Configuring CDP 20-1

Understanding CDP 20-1

Configuring CDP 20-2

Default CDP Configuration 20-2

Configuring the CDP Characteristics 20-2

Disabling and Enabling CDP 20-3

Disabling and Enabling CDP on an Interface 20-4

CDP and Ethernet Flow Points (EFPs) 20-4

Monitoring and Maintaining CDP 20-5

CHAPTER

21 Configuring LLDP and LLDP-MED 21-1

Understanding LLDP and LLDP-MED 21-1

Understanding LLDP 21-1

Understanding LLDP-MED 21-2

Configuring LLDP and LLDP-MED 21-3

Default LLDP Configuration 21-3

Configuring LLDP Characteristics 21-3

Disabling and Enabling LLDP Globally 21-4

Disabling and Enabling LLDP on an Interface 21-5

Configuring LLDP-MED TLVs 21-6

LLDP and Ethernet Flow Points (EFPs) 21-7

Monitoring and Maintaining LLDP and LLDP-MED 21-7

CHAPTER

22 Configuring UDLD 22-1

Understanding UDLD 22-1

Modes of Operation 22-1

Methods to Detect Unidirectional Links 22-2

Configuring UDLD 22-3

Default UDLD Configuration 22-4

Configuration Guidelines 22-4

Enabling UDLD Globally 22-5

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Enabling UDLD on an Interface 22-5

Resetting an Interface Disabled by UDLD 22-6

UDLD and Ethernet Flow Points (EFPs) 22-6

Displaying UDLD Status 22-7

CHAPTER

23 Configuring RMON 23-1

Understanding RMON 23-1

Configuring RMON 23-3

Default RMON Configuration 23-3

Configuring RMON Alarms and Events 23-3

Collecting Group History Statistics on an Interface 23-5

Collecting Group Ethernet Statistics on an Interface 23-5

Displaying RMON Status 23-6

CHAPTER

24 Configuring System Message Logging 24-1

Understanding System Message Logging 24-1

Configuring System Message Logging 24-2

System Log Message Format 24-2

Default System Message Logging Configuration 24-3

Disabling Message Logging 24-3

Setting the Message Display Destination Device 24-4

Synchronizing Log Messages 24-5

Enabling and Disabling Time Stamps on Log Messages 24-7

Enabling and Disabling Sequence Numbers in Log Messages 24-7

Defining the Message Severity Level 24-8

Limiting Syslog Messages Sent to the History Table and to SNMP 24-9

Enabling the Configuration-Change Logger 24-10

Configuring UNIX Syslog Servers 24-11

Logging Messages to a UNIX Syslog Daemon 24-11

Configuring the UNIX System Logging Facility 24-12

Displaying the Logging Configuration 24-13

CHAPTER

25 Configuring SNMP 25-1

Understanding SNMP 25-1

SNMP Versions 25-2

SNMP Manager Functions 25-3

SNMP Agent Functions 25-4

SNMP Community Strings 25-4

Using SNMP to Access MIB Variables 25-4

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SNMP Notifications 25-5

SNMP ifIndex MIB Object Values 25-5

MIB Data Collection and Transfer 25-6

Configuring SNMP 25-6

Default SNMP Configuration 25-7

SNMP Configuration Guidelines 25-7

Disabling the SNMP Agent 25-8

Configuring Community Strings 25-8

Configuring SNMP Groups and Users 25-10

Configuring SNMP Notifications 25-12

Setting the CPU Threshold Notification Types and Values 25-16

Setting the Agent Contact and Location Information 25-17

Limiting TFTP Servers Used Through SNMP 25-17

Configuring MIB Data Collection and Transfer 25-18

Configuring the Cisco Process MIB CPU Threshold Table 25-20

SNMP Examples 25-21

Displaying SNMP Status 25-23

CHAPTER

26 Configuring Network Security with ACLs 26-1

Understanding ACLs 26-1

Supported ACLs 26-2

Port ACLs 26-3

Router ACLs 26-4

VLAN Maps 26-5

Handling Fragmented and Unfragmented Traffic 26-5

Configuring IPv4 ACLs 26-6

Creating Standard and Extended IPv4 ACLs 26-7

IPv4 Access List Numbers 26-8

ACL Logging 26-8

Creating a Numbered Standard ACL 26-9

Creating a Numbered Extended ACL 26-10

Resequencing ACEs in an ACL 26-14

Creating Named Standard and Extended ACLs 26-14

Using Time Ranges with ACLs 26-16

Including Comments in ACLs 26-18

Applying an IPv4 ACL to a Terminal Line 26-18

Applying an IPv4 ACL to an Interface 26-19

Hardware and Software Treatment of IP ACLs 26-20

Troubleshooting ACLs 26-21

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IPv4 ACL Configuration Examples 26-22

Numbered ACLs 26-23

Extended ACLs 26-23

Named ACLs 26-24

Time Range Applied to an IP ACL 26-24

Commented IP ACL Entries 26-25

ACL Logging 26-25

Creating Named MAC Extended ACLs 26-26

Applying a MAC ACL to a Layer 2 Interface 26-28

Configuring VLAN Maps 26-29

VLAN Map Configuration Guidelines 26-29

Creating a VLAN Map 26-30

Examples of ACLs and VLAN Maps 26-31

Applying a VLAN Map to a VLAN 26-33

Using VLAN Maps in Your Network 26-33

Wiring Closet Configuration 26-33

Denying Access to a Server on Another VLAN 26-34

Using VLAN Maps with Router ACLs 26-35

VLAN Maps and Router ACL Configuration Guidelines 26-36

Examples of Router ACLs and VLAN Maps Applied to VLANs 26-37

ACLs and Switched Packets 26-37

ACLs and Routed Packets 26-37

ACLs and Multicast Packets 26-38

Displaying IPv4 ACL Configuration 26-39

CHAPTER

27 Configuring QoS 27-1

Understanding QoS 27-2

Modular QoS CLI Configuration 27-3

Hierarchical QoS 27-4

Classification 27-5

The match Command 27-6

Classification Based on Layer 2 CoS 27-7

Classification Based on IP Precedence 27-7

Classification Based on IP DSCP 27-7

CoS Mapping 27-8

Ingress Classification Based on QoS ACLs 27-9

Classification Based on QoS Groups 27-10

Classification Based on Discard Class 27-11

Classification Based on VLAN IDs 27-11

Contents

xx

Cisco ME 3800X and 3600X Switch Software Configuration Guide

OL-23400-01

Classification for MPLS and EoMPLS 27-11

Policing 27-13

Marking 27-14

Congestion Avoidance and Queuing 27-15

Congestion Management and Scheduling 27-17

Traffic Shaping 27-18

Class-Based Weighted Fair Queuing 27-19

Priority Queuing 27-20

Input and Output Policy Maps 27-20

Input Policy Maps 27-22

Output Policy Maps 27-22

QoS Treatment for Performance-Monitoring Protocols 27-23

Cisco IP-SLAs Probes 27-23

CPU Traffic 27-23

Configuring QoS 27-24

Default QoS Configuration 27-24

Configuration Guidelines and Limitations 27-24

Configuring Input Policy Maps 27-25

Configuring Input Class Maps 27-26

Using ACLs to Classify Traffic 27-28

Configuring Class-Based Marking 27-32

Configuring Policing 27-34

Configuring Output Policy Maps 27-41

Configuring Output Class Maps 27-41

Configuring Class-Based-Weighted Fair Queuing 27-44

Configuring Class-Based Shaping 27-47

Configuring Port Shaping 27-48

Configuring Class-Based Priority Queuing 27-49

Configuring Weighted Tail Drop 27-50

Hierarchical Policy Maps Configuration Examples 27-52

Configuring MPLS and EoMPLS QoS 27-53

Default MPLS and EoMPLS QoS Configuration 27-53

MPLS QoS Configuration Guidelines 27-54

Setting the Priority of Packets with Experimental Bits 27-54

MPLS DiffServ Tunneling Modes 27-55

Attaching a Service Policy to an Interface or EFP 27-56

Displaying QoS Information 27-57

CHAPTER

28 Configuring EtherChannels 28-1

Understanding EtherChannels 28-1

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Cisco 3845 - Security Bundle Router Software Manual

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