Hi all,

I deployed several 837 where ntp clients have been working fine.
But with one in particular there's no way for the client to be synchronized with the master. In particular below are 
output from status and ntp association:



Clock is unsynchronized, stratum 16, no reference clock
nominal freq is 250.0000 Hz, actual freq is 249.9998 Hz, precision is 2**20
reference time is 00000000.00000000 (01:00:00.000 cet Mon Jan 1 1900)
clock offset is 0.0000 msec, root delay is 0.00 msec
root dispersion is 0.00 msec, peer dispersion is 0.00 msec


       address         ref clock     st  when  poll reach  delay  offset    disp
  ~192.168.31.254   0.0.0.0          16     8    64    0     0.0    0.00  16000.
  * master (synced), # master (unsynced), + selected, - candidate, ~ configured


It is strange that client (IMHO) connects to the master but doesn't receive a reference clock.

Any suggestion is really welcome.

Alex.

Hi Alex,

AM schrieb:
> [...]
> 
>       address         ref clock     st  when  poll reach  delay  
> offset    disp
>  ~192.168.31.254   0.0.0.0          16     8    64    0     0.0    0.00  
> 16000.
>  * master (synced), # master (unsynced), + selected, - candidate, ~ 
> configured
> 
> 
> It is strange that client (IMHO) connects to the master but doesn't 
> receive a reference clock.

Why do you think the client connected to the master? "reach 0" says it 
all, your little cisco did never manage to get a reply from your NTP 
server, so ...

> Any suggestion is really welcome.

1. Can you ping your NTP server from the Cisco?
2. Are there any restrictions configured on the NTP server? (show us 
your config file)

> 
> Alex.

Kind regards,
Heiko




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Heiko Gerstung wrote:
> Hi Alex,
> 
> 1. Can you ping your NTP server from the Cisco?
Yes,

> 2. Are there any restrictions configured on the NTP server? (show us 

I've enabled only udp 123 port on a firewall put in the middle between 837 and the server as for other 837 deployed.

> your config file)

ntp clock-period 17179628
ntp server 130.149.17.21
ntp server 212.82.32.15
ntp server 150.145.55.6

I can add that

1) setting a public ntp server on the client worked fine: it means the client was synchronized;
2) other 837 connected to the ntp server via VPN have been working fine with the same firewall settings;


Thanks,
  Alex.

Alex,

> 
> ntp clock-period 17179628
> ntp server 130.149.17.21
> ntp server 212.82.32.15
> ntp server 150.145.55.6
> 
> I can add that
> 
> 1) setting a public ntp server on the client worked fine: it means the
> client was synchronized;
> 2) other 837 connected to the ntp server via VPN have been working fine
> with the same firewall settings;

Sorry, no more ideas here, as far as I can see you are using a Cisco as
your NTP server ("master"), therefore maybe the guys in the cisco groups
can help...

> Thanks,
>  Alex.

Sorry for not being able to help you out, good luck!

Kind regards,
Heiko