
248
Chapter 6 System configuration using the Console Interface
320985-A Rev 01
Using SNTP
The Simple Network Time Protocol (SNTP) feature synchronizes the Universal
Coordinated Time (UTC) to an accuracy within 1 second. This feature adheres to
the IEEE RFC 2030 (MIB is the s5agent). With this feature, the system can obtain
the time from any RFC 2030-compliant NTP/SNTP server.
The system attempts to connect to the NTP server at least three times, with five
minutes duration between each retry. If the connection fails after three attempts,
the system waits for the next synchronization time (the default is 24 hours) and
begins the process again.
SNTP provides a real-time timestamp for the software, shown as Greenwich
Mean Time (GMT).
If SNTP is enabled (the default value is disabled), the system synchronizes with
the configured NTP server at boot-up and at user-configurable periods thereafter
(the default sync interval is 24 hours). The first synchronization is not performed
until network connectivity is established.
SNTP supports primary and secondary NTP servers. The system tries the
secondary NTP server only if the primary NTP server is unresponsive.
Configuring with CLI
You can use the CLI to configure the SNTP feature, ensuring that you complete
the following steps:
1
Set the primary and secondary NTP server.
2
Enable SNTP.
3
Display the UTC time.
4
Optionally, to ensure the synchronization happens immediately, force a
synchronization.
Note:
If you have trouble using this feature, try other NTP servers. Some
NTP servers may be overloaded or currently inoperable.
Summary of Contents for 425-24T
Page 20: ...20 Contents 320985 A Rev 01 ...
Page 38: ...38 Preface 320985 A Rev 01 ...
Page 198: ...198 Chapter 4 Getting Started with Device Manager 320985 A Rev 01 ...
Page 212: ...212 Chapter 5 Using the Web based management interface 320985 A Rev 01 ...
Page 318: ...318 Chapter 7 System configuration using the CLI 320985 A Rev 01 ...
Page 336: ...336 Chapter 8 Ethernet port management using the CLI 320985 A Rev 01 ...
Page 384: ...384 Chapter 11 Administering the switch using Web based management 320985 A Rev 01 ...
Page 404: ...404 Chapter 12 Configuring the switch using Web based management 320985 A Rev 01 ...
Page 424: ...424 Installing an SFP Transceiver 320985 A Rev 01 ...
Page 442: ...442 Default settings 320985 A Rev 01 ...
Page 468: ...468 Command List 320985 A Rev 01 ...
Page 474: ...474 Technical specifications 320985 A Rev 01 ...
Page 488: ...488 Index 320985 A Rev 01 ...