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select NTP server version on IOS router

david.tran
Level 4
Level 4

‎12-27-2012 05:12 PM - edited ‎03-04-2019 06:31 PM

I have the following commands on my Cisco 3845 router running IOS version 12.2(24)T4:

ntp server 192.168.1.1 prefer

ntp server 192.168.1.2

ntp source loopback0

I see that the router is sending out NTP version 4; however, my NTP server is configured to accept only NTP version 3.  Anything other than version 3 will be dropped.

How do I go about to configure NTP on the Cisco IOS router to send out only version 3 and not version 4?

Thanks,

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david.tran
Level 4
Level 4

‎12-27-2012 05:19 PM

Found it

ntp server 192.168.1.1 version 3 prefer

ntp server 192.168.1.2 version 3

ntp source loopback0

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