Cisco - clock set how to make it permanent ?

[Arup Dutta]

hello,
on catalyst 3750 (EMI) how to set clock in a permanent way ?
after a reboot clock comes back to March 1993 without saving
the time and day settings in ROM.
I have to "clock set" it every time.
how to fix it?
thanks

AD

[Bert Gevers]

Hello Arup,

The 3750 FAQ provides the answer to your question:

http://www.cisco.com/en/US/products/hw/switches/ps5023/products_tech_note09186a00807ccc79.shtml#clock

Basically, the 3750 does not have a battery-supported system clock.  Therefore, it is advisable to configure the system to use NTP to synchronize it's clock upon reload.

HTH,

Bert

[Arup Dutta]

Hi Bert,

Thanking you for your quick support .could you tell me please how

i can configure NTP server into my switch.

Regards,

AD

On Thu, Nov 4, 2010 at 12:01 PM, bgevers <

[Bert Gevers]

Hello AD,

the quick summary is to configure 'ntp server '' on the device.

The NTP server can be internal on your network or an NTP Server on the internet (eg. NIST).

The full configuration guide in regards to NTP can be found here:

http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_55_se/configuration/guide/swadmin.html

Bert

[Leo Laohoo]

If you have Windows servers, you can configure them to be an authoritative NTP server.

How to configure an authoritative time server in Windows XP
http://support.microsoft.com/kb/314054

How to configure an authoritative time server in Windows Server
http://support.microsoft.com/kb/816042

How to configure an authoritative time server in Windows 2000
http://support.microsoft.com/kb/216734

Otherwise, use a dedicated NTP server that synchronizes itself using GPS.

Please don't forget to rate our useful posts.  Thanks. 

[Leo Laohoo]

Thanks for the rating.