From: Bogdan Sass (bogdan.sass@catc.ro)
Date: Sun Nov 16 2008 - 13:42:40 ARST
GAURAV MADAN wrote:
> Hi Group
>
> Somehow I am not getting my NTP synchronised . Can someone help me in this .
> I have R1
> / \
> / \
> R2 R3
> R1 as Hub and R2 and R3 as spokes
>
> R1 as NTP server and R2 and R3 as clients.
>
Check your authentication keys. As you can see below, they are
different from one router to the other.
> R1
> ******
> R1(config)#do sh run | inc ntp
> ntp authentication-key 1 md5 02250D480809 7
>
Decrypted password: Cisco
> ntp master 2
>
> R2
> **********
> R2(config)#do sh run | inc ntp
> ntp authentication-key 1 md5 0802455D0A16 7
>
Decrypted password: f6;n-k
> ntp authenticate
> ntp trusted-key 1
> ntp server 131.1.12.1 key 1 prefer
> R2(config)#
>
> R3
> **********
> R3(config)#do sh run | inc ntp
> ntp authentication-key 1 md5 01300F175804 7
>
Decrypted password: Ciscof
> *Nov 16 14:14:41.037: NTP Core(NOTICE): ntp_receive: dropping message:
> crypto-NAK.
>
^^^^^^^^^^ Mismatched keys
-- Bogdan Sass CCNP,CCSP,JNCIA-ER,CCIE #22221 (RS) Information Systems Security Professional "Curiosity was framed - ignorance killed the cat"Blogs and organic groups at http://www.ccie.net
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