NTP problem: insane source

[jum]

Hi,

I have a router synchronized to a time server and a few

2950 switches synchronized on the router. When I enter the command "ntp server ..." on the 2950, the synchronization occur but after 2 or 3 minutes the router appears as insane, invalid.

If I configure a "no ntp server" and then re-enter the same ntp server, the synchronization occur again but just for 2/3 minutes.

Is anybody have a idea?

[jsivulka]

Here is a link that outlines the process for configuring the 2950 for NTP

http://www.cisco.com/en/US/customer/products/hw/switches/ps628/products_configuration_guide_chapter09186a008007e8bf

[ED CARMODY]

Link doesn't work...

I have a similar problem with IOS Access Points [12.2(13)JA1]. I'm using a FreeBSD 5.1-release machine as an ntp server; APs sync fine, but eventually lose sync, reporting my ntp server as 'insane.' Killing and restarting ntp on the AP fixed the issue for a while.

[jum]

I think I have the solution. Just enter a "no ntp clock-period" to force the IOS to to revert to default the parameter and re calculate it. It solves my problem.