Enabling NTP on 3750 Switches ?

[Sagar18]

I have 3750 and several
2960 Switches in my office.
I want to set up any 1 of
my switches as an NTP
master and other switches
recieve time from it. But
both the above models
dont support NTP MASTER
command. I dont want to
involve server in this
process. So what is the
other alternative. Can I use
a client xp machine to be a
NTP Master. Is there any
softwares which can do
this.
NB: I cant upgrade my IOS

 

[ADB100]

There are various freeware NTP servers available for Windows - have a search. You can also configure a Windows Server as an NTP master, however if there is Internet access available (or can be) then I'd configure one of your 3750's to sync to a 'real' NTP server on the Internet. Or even better buy a GPS clock and sync to this?

Andy

 

[burtsbees]

Do any of your switches support the "ntp peer" command?

What is your edge router model(s)?

You can usually configure your switch as an NTP server by the peer command...

switch-10-1-1-1#conf t
switch(config)#ntp peer 10.1.1.13

and on 10.1.1.13

switch-10-1-1-13#conf t
switch(config)#ntp server 10.1.1.1

post a sh ver from each of both models. Any Cisco device can serve as the NTP server.

Myself, I use a free internet stratum 15 NTP server on my edge router, and have all my nodes (switches, other routers, WAPs, computers, servers, printers) authenticate to my edge router.

TIMMAY!

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[Sagar18]

Thank you ADB100 and Burstbees for your reply. I am pretty confused with this small technology lol.
I have 2800 as my edge router. But I'm not supposed to configure it. My organisation set up is so complex and I dont have a direct ping to the internet from my 3750 Core switch.
Now since I'm very new to networking I have lot of doubts. What is the difference between an NTP Master and an NTP Server. If I hardcore my 3750 with a clock set command can my other 2960 who has ping to the management IP s can synchronise time from it. Sorry for my lack of knowledge on the subject.