NTP error

[adamgibs7]

Dears,

I get the below logs in the router , but the time is in sync properly I don't know what does the error  mentioned ,, hence I tried to search but couldn't find related to the error, can any body explain me what exactly the error is.

The router models are 2851: c2800nm-advsecurityk9-mz.151-4.M10.bin and 1941: c1900-universalk9-mz.SPA.155-3.M5.bin

NTP Core (NOTICE): ntp_receive: dropping message: MODE_PRIVATE restriction.

Thanks

[Meheretab Mengistu]

Hi,

Are you running NTPv4? If so, NTP private mode packet processing is enabled by default in NTPv4.
You can disable private mode using "no ntp allow mode private" configuration command.

HTH,
Meheretab

[adamgibs7]

Dears

I am not running NTP v4 there are normal NTP commands how I can know whether it is enabled or not ??

thanks

[Meheretab Mengistu]

Thanks for the update. Please post the output of "sh run | sec ntp".

HTH,
Meheretab

[adamgibs7]

ntp logging
ntp authentication-key 1 md5 XXX1 7
ntp authenticate
ntp trusted-key 1
ntp server 10.10.10.10 key 1 prefer

[Meheretab Mengistu]

Please look at the following two docs:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/bsm/configuration/15-mt/bsm-15-mt-book/bsm-time-calendar-set.html#GUID-FD1DB23A-9A9D-46DA-B650-0587D8A18C3B
and
https://tools.cisco.com/security/center/viewAlert.x?alertId=19540

HTH,
Meheretab

[Georg Pauwen]

Hello,

post the output of 'show ntp information', it should look something like below:

Router#sh ntp information
Ntp Software Name : Cisco-ntpv4
Ntp Software Version : Cisco-ntpv4-1.0
Ntp Software Vendor : CISCO
Ntp System Type : Cisco IOS / NPE400

[JohnRosso3555]

I'm on a Cisco CAT 9500-16x IOS-XE Gibraltar 16.12.x and I also get this error too. How may I stop this as well?

DRF312cisco-WWW#show ntp information
Ntp Software Name : Cisco-ntpv4
Ntp Software Version : Cisco-ntpv4-1.0
Ntp Software Vendor : CISCO
Ntp System Type : Cisco IOS / X86

DRF312cisco-WWW(config)#no ntp allow mode private
%NTP: This configuration command is deprecated.
DRF312cisco-WWW(config)#