Allied Telesis AT-S63 - Manual (Page 36)

Chapter 1: Basic Switch Parameters
36 Section I: Basic Operations
Setting the System Time
This procedure explains how to set the switch’s date and time. Setting the
system time is important if you configured the switch to send traps to your
management stations. Traps from a switch where the time has not been
set do not contain the correct date and time. Therefore, it becomes difficult
for you to determine when the events represented by the traps occurred.
It is also important to set the system time if you intend to use the Secure
Sockets Layer (SSL) certificate feature described in, Chapter 34, ”PKI
Certificates and SSL” on page 607. Certificates must contain the date and
time when they are created.
There are two ways to set the switch’s time. One method is to set it
manually. The AT-9400 Switch has an onboard battery that maintains the
date and time even when the unit is powered off or reset. For instructions,
refer to “Setting the System Time Manually,” next.
The second method uses the Simple Network Time Protocol (SNTP). The
AT-S63 Management Software is shipped with the client version of this
protocol. You can configure the AT-S63 Management Software to obtain
the current date and time from an SNTP or Network Time Protocol (NTP)
server located on your network or the Internet. For instructions, refer to
“Setting the System Time from an SNTP or NTP Server” on page 38.
SNTP is a reduced version of the NTP. However, the SNTP client software
in the AT-S63 Management Software is interoperable with NTP servers.
The local subnet on the switch where the SNTP server is a member must
have a routing interface. The switch uses the IP address of the routing
interface as its source address when communicating with the server. To
configure routing interfaces using the menus interface, refer to Chapter
29, “Internet Protocol Version 4 Routing Interfaces” on page 543 in this
guide.
Note
Prior to version 2.0.0 of the AT-S63 Management Software, the
SNTP server had to be a member of the switch’s management
VLAN. This restriction no longer applies. The SNTP server can be
located on any local subnet of the switch, provided the subnet has a
routing interface.
Note
The default system time on the switch is midnight, January 1, 1970.