Router NTP and Win2K Server

[PinkLips]

All my edge routers are synched to my core router's time. I want my core router to synch with my Windows 2000 Server. I run the command ntp sever x.x.x.x on the core router, but it's not working. When I do sh ntp status on the core router, it says that it is not synchronized. How can I get my router time to synch with my Win2K server?

Thanks,
Nicole

 

[bell1996]

Verify that your server is using the same port number as the router. Some devices use UDP port 37 with others use UDP port 123. I don't recall which port the router uses (I'll research this later).

 

[plshlpme]

for firewall issues you may have to specify the source interface that you are using to sync to the server...

when you do a show ntp ass..
what do you see

 

[PinkLips]

i'm not going through any fw. when i do sh ntp ass, it sees that ntp is configured, but the time never changes on the router to match the server's time.

Thanks,
Nicole

 

[plshlpme]

do you have to specify on the win2k server who is authorized to to connect to you?

when you do a show ntp ass can you put the output?
does it say syncronized? or configured?

example

router#sho ntp ass

address ref clock st when poll reach delay offset disp
*~a.a.a.a b.b.b.b 4 38 64 377 193.3 -7.95 0.4
* master (synced), # master (unsynced), + selected, - candidate, ~ configured

 

[plshlpme]

sho ntp stat
is another good command to help

 

[ADB100]

I don't think the standard Time Service in Windows 2000 will work. I have tried this a few times and never got it working - the Windows Time Service is SNTP and not NTP, you can probably get a low-end router (800-series) or a Wireless Access Point to sync the time off Windows 2000, but anything wanting an NTP server won't work.
The best solution is to sync a core router off a real time server on the Internet (there are loads....) or a GPS device, then sync your Windows 2000 Domain controller off that, as well as your internal switches etc.

Andy