Contents

HSRP and Standby Cluster Command Switches

6-11

Virtual IP Addresses

6-12

 

Other Considerations for Cluster Standby Groups 6-12

Automatic Recovery of Cluster Configuration

6-13

IP Addresses

6-14

 

 

Hostnames

6-14

 

 

Passwords

6-15

 

 

SNMP Community Strings

6-15

 

Switch Clusters and Switch Stacks 6-16

 

TACACS+ and RADIUS 6-17

 

LRE Profiles

6-17

 

 

 

 

Using the CLI to Manage Switch Clusters

6-18

 

 

 

 

 

 

 

Catalyst 1900 and Catalyst 2820 CLI Considerations 6-18

 

 

Using SNMP to Manage Switch Clusters

6-19

 

 

 

 

 

 

Administering the Switch

 

 

 

 

 

 

 

 

 

C H A P T E R 7

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

 

 

 

 

 

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

 

 

 

 

 

 

 

 

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

 

 

 

 

 

 

 

 

OL-9775-02

 

 

 

 

 

 

 

 

vii

 

 

 

 

 

 

 

 

 

 

 

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Cisco Systems 3750E manual Catalyst 1900 and Catalyst 2820 CLI Considerations, Vii