clock synchronization

[Natha340Mai340]

Hello everyone, I'm need synchronization clock device ( Switches e routers ) of the my network with a server ntp inside network.

I've done the command follow in a switch ( for test ) but it isn't working.

SEAA(conf)#ntp server 128.2.7.31

the switch clock keep show the same hour and date.

SEAA-001#show clock
*21:42:01.835 UTC Tue Mar 9 1993
SEAA-001#

What I need do ??

thank

[mrdogantr]

Hi Maicon,

     Can you send "show ntp status" and "show ntp associations" outputs.

regards.

Muammer

[Natha340Mai340]

SEAA-001#show ntp status
Clock is unsynchronized, stratum 16, no reference clock
nominal freq is 119.2092 Hz, actual freq is 119.2092 Hz, precision is 2**18
reference time is 00000000.00000000 (00:00:00.000 UTC 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

SEAA-001#show ntp as
SEAA-001#show ntp associations

      address         ref clock     st  when  poll reach  delay  offset    disp
~128.2.7.31       0.0.0.0          16     -    64    0     0.0    0.00  16000.
* master (synced), # master (unsynced), + selected, - candidate, ~ configured
SEAA-001#

SEAA-001#show clock
*23:02:00.076 UTC Tue Mar 9 1993

[mrdogantr]

Post "debug ntp events"  and "debug ntp packets"

--------------------

Muammer.

[Natha340Mai340]

Sorry, but I'm conected by telnet...so I cant see debug message.

there is other tip ??

thank

[manish arora]

try

sw(config)#ntp client enable

Post sh ntp status & sh ntp associations detail

Helpful link for setting up timezones & daylight savings.

http://www.cisco.com/en/US/docs/switches/lan/catalyst5000/catos/5.x/configuration/guide/ntp.html

Manish

[Natha340Mai340]

Manish, there is no this command in my switch.

SEAA-001#show version
Cisco IOS Software, C3560 Software (C3560-IPBASE-M), Version 12.2(35)SE5, RELEAS
E SOFTWARE (fc1)

thank

[manish arora]

What version of NTP are you running on your server ?

try :-

ntp server X.X.X.X version 2 prefer

Manish

[Natha340Mai340]

My NTP server is a Windows NT. but, I can't get the version the NTP server that runing on server yet.

I only know it's on Windows NT.

thank

[manish arora]

Hi,

I did checked you sh ntp association again , the POLL value of 64 normally indicate that the Clock is unreachable, can you please verify that the switch is able to reach the NTP server ? I would run a wireshark on the server to see if it's reciveing any poll packets from the switch.

Also, by 3560 switches use version 3 of NTP , so verify what version of ntp are you running on your server.

also "terminal monitor" is the command for enabling console messages on telnet windows.

Manish

[Leo Laohoo]

Have you tried other Cisco switches?

[Natha340Mai340]

yes I tried on other....but the same problem....I think it's something in my configuration.

thank