Cisco Catalyst 3750-X User Manual

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Catalyst 3750-X and 3560-X Switch Software Configuration Guide
OL-21521-01
Chapter 7 Administering the Switch
Managing the System Time and Date
Displaying the Time and Date Configuration
To display the time and date configuration, use the show clock [detail] privileged EXEC command.
The system clock keeps an au
thoritative flag that shows whether the time is authoritative (believed to be
accurate). If the system clock has been set by a timing source such as NTP, the flag is set. If the time is
not authoritative, it is used only for display purposes. Until the clock is authoritative and the
authoritative flag is set, the flag prevents peers from synchronizing to the clock when the peers’ time is
invalid.
The symbol that precedes the sho
w clock display has this meaning:
• *—Time is not authoritative.
• (blank)—Time is authoritative.
• .—Time is authoritative, but NTP is not synchronized.
Configuring the Time Zone
Beginning in privileged EXEC mode, follow these steps to manually configure the time zone:
The m
inutes-offset variable in the clock timezone global configuration command is available for those
cases where a local time zone is a percentage of an hour different from UTC. For example, the time zone
for some sections of Atlantic Canada (AST) is UTC-3.5, where the 3 means 3 hours and.5 means 50
percent. In this case, the necessary command is clock timezone AST -3 30.
To set the time to UTC, use the no clock t
imezone global configuration command.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
clock timezone zone hours-offset
[minutes-offset]
Set the time zone.
The switch keeps internal time in universal time coordinated (UTC), so
thi
s command is used only for display purposes and when the time is
manually set.
• For zone, enter the name of the time zone to be displayed when
standard time is in effect. The default is UTC.
• For hours-offset, enter the hours offset from UTC.
• (Optional) For minutes-offset, enter the minutes offset from UTC.
Step 3
end Return to privileged EXEC mode.
Step 4
show running-config Verify your entries.
Step 5
copy running-config startup-config (Optional) Save your entries in the configuration file.

Cisco Catalyst 3750-X Specifications

General

Switching Capacity	160 Gbps
Stacking Bandwidth	64 Gbps
Max Stacking Units	9
Layer Support	Layer 2 and Layer 3
Form Factor	Rack-mountable
DRAM	256 MB
Flash Memory	64 MB
Model	Cisco Catalyst 3750-X Series
Ports	24 or 48 10/100/1000 Ethernet ports
Uplink Interfaces	4 SFP or 2 SFP+
Features	StackWise Plus, EnergyWise
Image	IP Base or IP Services
Operating Temperature	0 to 40°C
Operating Humidity	10 to 85% noncondensing