User's Manual

4 – Managing Switches
Setting the Date/Time and Enabling NTP Client
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4.5
Setting the Date/Time and Enabling NTP Client
The Date/Time and Network Time Protocol (NTP) dialog enables you to manually
set the date and time on a switch, or to enable NTP Client to synchronize the date
and time on the switch with an NTP server. Enabling the NTP client ensures the
consistency of date and time stamps in alarms and log entries. An Ethernet
connection to an NTP server is required. When date/time is set or displayed in the
firmware, it is always in Universal Time, However, when displayed in the
Date/Time dialog, the value is always in local time. To set the date and time on a
switch, do the following:
1. Select a switch in the topology display, and open the faceplate display.
2. Open the Switch menu, and select Set Date/Time....
3. Choose one of the following:
 Enter the year, month, day and time in the Switch Date/Time dialog,
then click OK. The new date and time take effect immediately.
 Click the NTP Client Enabled checkbox to enable the switch to
synchronize its time with an NTP server. Enter the IP address of the
NTP server. Ethernet connection to NTP server is required. Click the
OK button to save the settings.
4.6
Resetting a Switch
Resetting a switch reboots the switch using configuration parameters in memory.
Depending on the reset type, a switch reset may or may not include a power-on
self test or it may or may not disrupt traffic. Table 4 - 2 describes the types of switch
resets.
During a hotreset operation, fabric services will be unavailable for a short period
(30-75 seconds depending on switch model). Verify all administrative changes to
the fabric (if any) are complete before performing an Nondisruptive Code Load
and Activation (NDCLA). When upgrading firmware across a fabric using
non-disruptive activation, upgrade one switch at a time and allow 75 seconds
between switches.
Common administrative operations that change the fabric include:
 Zoning modifications
 Adding, moving or removing devices attached to the switch fabric. This
includes powering up or powering down attached devices.
 Adding, moving or removing ISLs or other connections.
CAUTION!
Changes to the fabric may disrupt the NDCLA process.