[c-nsp] NTP no longer slewing clock under 12.2(33)SXJ2 ???

[Matthew Huff]

Ugh.

Even though Cisco's documentation clearly states that ntp access groups are not configured by default and the default is all access, for security reasons they now default to no updates.

You would think this would through off an error in the syslog especially if "ntp logging" is configured.

So, setting up an acl and defining "ntp acess-group peer xxx" solves the issue.

> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On
> Behalf Of Matthew Huff
> Sent: Sunday, January 08, 2012 12:30 PM
> To: 'cisco-nsp at puck.nether.net'
> Subject: [c-nsp] NTP no longer slewing clock under 12.2(33)SXJ2 ???
> 
> Upgraded this weekend from 12.2(33)SXI5 to SXJ2. Everything appears fine accept NTP. I
> understand that SJ2 upgrades NTP from v3 to v4, but although it appears to be working, the
> local clock never slews (corrects to NTP time). The offsets in ntp stay stable, rather
> than converging on the correct time.
> 
> Anyone else seen this?
> 
> switch-core1#show ntp associations
> 
>   address         ref clock       st   when   poll reach  delay  offset   disp
> +~128.4.1.1       .PPS.            1    431    512   377  6.220 186.249  9.071
>  ~127.127.1.1     .LOCL.           7      4     16   377  0.000   0.000  0.238
> +~209.81.9.7      .GPS.            1    420    512   377 76.374 189.382 13.435
> +~69.36.224.15    .GPS.            1    179    512   377 80.046 188.355 17.814
> -~64.183.55.54    109.99.226.215   3    421    512   377 84.159 175.329  9.469
> -~204.152.184.72  .GPS.            1    427    512   377 74.559 185.210 12.907
> +~216.218.254.202 .CDMA.           1    400    512   377 75.982 189.300 11.174
> -~18.26.4.105     .CDMA.           1    406    512   377 36.859 173.421 14.156
> *~209.51.161.238  .CDMA.           1    436    512   377  4.063 188.962 11.768
> -~130.207.244.240 .GPS.            1    412    512   377 28.666 184.413 10.079
> +~198.60.22.240   .GPS.            1    349    512   377 64.370 187.676 14.138
>  * sys.peer, # selected, + candidate, - outlyer, x falseticker, ~ configured
> 
> switch-core1#show ntp status
> Clock is synchronized, stratum 2, reference is 209.51.161.238
> nominal freq is 250.0000 Hz, actual freq is 249.9999 Hz, precision is 2**24
> reference time is D2B44C27.24A08416 (12:08:55.143 EST Sun Jan 8 2012)
> clock offset is 188.9620 msec, root delay is 4.06 msec
> root dispersion is 215.24 msec, peer dispersion is 11.76 msec
> loopfilter state is 'CTRL' (Normal Controlled Loop), drift is 0.000000180 s/s
> system poll interval is 512, last update was 1219 sec ago.
> 
> switch-core1#show clock detail
> 12:29:18.402 EST Sun Jan 8 2012
> Time source is NTP
> Summer time starts 02:00:00 EST Sun Mar 11 2012
> Summer time ends 02:00:00 EDT Sun Nov 4 2012
> 
> ----
> Matthew Huff             | 1 Manhattanville Rd
> Director of Operations   | Purchase, NY 10577
> OTA Management LLC       | Phone: 914-460-4039
> aim: matthewbhuff        | Fax:   914-460-4139
> 
> 
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