8

Time Protocols

Contents

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

TimeP Time Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

SNTP Time Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

Selecting a Time Synchronization Protocol or Turning Off Time

Protocol Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3 General Steps for Running a Time Protocol on the Switch: . . . . . . . . 8-3 Disabling Time Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4

SNTP: Viewing, Selecting, and Configuring . . . . . . . . . . . . . . . . . . . . . 8-4 Menu: Viewing and Configuring SNTP . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5 CLI: Viewing and Configuring SNTP . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-8

TimeP: Viewing, Selecting, and Configuring . . . . . . . . . . . . . . . . . . . . 8-14 Menu: Viewing and Configuring TimeP . . . . . . . . . . . . . . . . . . . . . . . . 8-15 CLI: Viewing and Configuring TimeP . . . . . . . . . . . . . . . . . . . . . . . . . . 8-17

SNTP Unicast Time Polling with Multiple SNTP Servers . . . . . . . . 8-22Address Prioritization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-22 Adding and Deleting SNTP Server Addresses . . . . . . . . . . . . . . . . . . . 8-22 Menu: Operation with Multiple SNTP Server Addresses Configured 8-24

SNTP Messages in the Event Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-24

8-1