9

Time Protocols

Contents

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2

TimeP Time Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2

SNTP Time Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2

Overview: Selecting a Time Synchronization Protocol or Turning Off Time Protocol Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3

General Steps for Running a Time Protocol on the Switch: . . . . . . . . 9-3

Disabling Time Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4

SNTP: Viewing, Selecting, and Configuring . . . . . . . . . . . . . . . . . . . . . . . . . 9-4

Menu: Viewing and Configuring SNTP . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5

CLI: Viewing and Configuring SNTP . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-8

Viewing the Current SNTP Configuration . . . . . . . . . . . . . . . . . . . . 9-8

Configuring (Enabling or Disabling) the SNTP Mode . . . . . . . . . . 9-9

TimeP: Viewing, Selecting, and Configuring . . . . . . . . . . . . . . . . . . . . . . . . 9-14

Menu: Viewing and Configuring TimeP . . . . . . . . . . . . . . . . . . . . . . . . 9-15

CLI: Viewing and Configuring TimeP . . . . . . . . . . . . . . . . . . . . . . . . . . 9-16

Viewing the Current TimeP Configuration . . . . . . . . . . . . . . . . . . 9-17

Configuring (Enabling or Disabling) the TimeP Mode . . . . . . . . 9-18

SNTP Unicast Time Polling with Multiple SNTP Servers . . . . . . . . . . . . . 9-21

Address Prioritization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-22

Adding and Deleting SNTP Server Addresses . . . . . . . . . . . . . . . . . . . 9-22

Menu Interface Operation with Multiple SNTP Server Addresses

Configured . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-24

SNTP Messages in the Event Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-24

9-1