From: wei mou (router.mou@gmail.com)
Date: Sun Dec 24 2006 - 13:56:03 ART
hi,
you can check on this page:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cr/hcf_r/cfn_05h.htm#wp1046533
look for NTP command. hope can help a bit.
some thoughts:
1. we should not set the ntp clock-period. the router set automatically.
2. i see the time configurations on both routers are quite different. think
it might be helpful to set them closer.
plan to do some experiment when get chance, plz keep me posted on this
issue.
Regards
Steve
On 12/19/06, Tim <ccie2be@nyc.rr.com> wrote:
>
> I'm not 100% sure but...
>
> maybe if you remove the "ntp master 11" command on R1.
>
> I think that command should only be used when R1 is NOT getting ntp from a
> lower stratum source.
>
> HTH, Tim
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Vinu
> Sent: Tuesday, December 19, 2006 5:41 AM
> To: Cisco certification
> Subject: Need some insight on NTP
>
> dear all,
> i have a problem in NTP....
>
> i have a third party stratum X(stratum 9) and in R1 i also have a local
> master(stratum 11), r1 is getting clock from X and R@ is getting clock
> from
> r1, the problem is R2 is no synchronising with R1...in R2 it
> shows...*Clock
> is unsynchronized, stratum 16*
>
>
>
> MY stratum is x
>
> *r1*
> *ntp clock-period 17207899
> ntp master 11
> ntp server 10.0.20.45 (ip address of X)*
>
> r1#sh ntp status
> Clock is synchronized, stratum 10, reference is 10.0.20.45
> nominal freq is 250.0000 Hz, actual freq is 249.5927 Hz, precision is
> 2**24
> reference time is C9323E0D.15397840 (16:01:41.082 IST Tue Dec 19 2006)
> clock offset is -860.8162 msec, root delay is 1.59 msec
> root dispersion is 1703.00 msec, peer dispersion is 831.88 msec
>
> r1#sh ntp asso
> address ref clock st when poll reach delay offset
> disp
> +~127.127.7.1 127.127.7.1 10 45 64 377 0.0 0.00
> 0.0
> *~10.0.20.45 127.127.1.1 9 52 64 377 4.2 -1070.
> 262.5
> * master (synced), # master (unsynced), + selected, - candidate, ~
> configured
>
>
> *r2*
> *ntp clock-period 17180320
> ntp server 10.63.0.2 (IP address of R1)*
>
> r2#sh ntp associations
>
> address ref clock st when poll reach delay offset
> disp
> ~10.63.0.2 10.0.20.45 10 275 1024 377 12.0 -4658.
> 127.0
> * master (synced), # master (unsynced), + selected, - candidate, ~
> configured
>
> r2#sh ntp status
> *Clock is unsynchronized, stratum 16*, no reference clock
> nominal freq is 250.0000 Hz, actual freq is 249.9934 Hz, precision is
> 2**18
> reference time is C92BD520.47490F92 (19:20:24.278 IST Thu Dec 14 2006)
> clock offset is 84.2051 msec, root delay is 6.84 msec
> root dispersion is 16943.60 msec, peer dispersion is 15875.02 msec
>
>
>
> --
> Regards,
> Vinu
>
> "A person should not be too honest. Straight trees are cut first and
> honest
> people are screwed first."
>
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