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Highlighted
Beginner

ntp changed aftr two days on 2901

Dear All

i have 2901 router , i configured on ntp , after two days the time changed , how to solve this ?

VG-KC(config)#do sh ntp sta

Clock is synchronized, stratum 5, reference is 127.127.7.1

nominal freq is 250.0000 Hz, actual freq is 250.0275 Hz, precision is 2**18

reference time is D5FBD6EF.E19F58F3 (15:32:47.881 kuwaitz Sun Oct 6 2013)

clock offset is 0.0000 msec, root delay is 0.00 msec

root dispersion is 375.02 msec, peer dispersion is 375.02 msec

VG-KC#sh ntp associations

      address         ref clock     st  when  poll reach  delay  offset    disp
*~127.127.7.1      127.127.7.1       4    36    64  377     0.0    0.00     0.0
~212.26.18.43     0.0.0.0          16     -    64    0     0.0    0.00  16000.
~212.26.18.41     0.0.0.0          16     -  1024    0     0.0    0.00  16000.
* master (synced), # master (unsynced), + selected, - candidate, ~ configured


VG-KC#
VG-KC#sh vers
Cisco IOS Software, 2801 Software (C2801-IPVOICEK9-M), Version 12.4(21a), RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2008 by Cisco Systems, Inc.
Compiled Mon 29-Sep-08 16:30 by prod_rel_team

ROM: System Bootstrap, Version 12.4(13r)T, RELEASE SOFTWARE (fc1)

VG-KC uptime is 1 day, 22 hours, 52 minutes
System returned to ROM by reload at 04:35:19 kuwaitz Fri Oct 4 2013
System restarted at 16:42:12 kuwaitz Fri Oct 4 2013
System image file is "flash:c2801-ipvoicek9-mz.124-21a.bin"


This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to
export@cisco.com.

Cisco 2801 (revision 7.0) with 233472K/28672K bytes of memory.
Processor board ID FCZ125391FT
2 FastEthernet interfaces
8 Voice FXO interfaces
3 DSPs, 48 Voice resources
DRAM configuration is 64 bits wide with parity disabled.
191K bytes of NVRAM.
62720K bytes of ATA CompactFlash (Read/Write)

Configuration register is 0x2102

4 REPLIES 4
Highlighted
Beginner

Hi,

In the output you can see that the NTP servers(212.26.18.43  &  212.26.18.41 ) have stratum value of 16.

Any stratum number that is above 15 is considered as unsynchronized.

VG-KC#sh ntp associations

      address         ref clock     st  when  poll reach  delay  offset    disp
*~127.127.7.1      127.127.7.1       4    36    64  377     0.0    0.00     0.0
~212.26.18.43     0.0.0.0          16     -    64    0     0.0    0.00  16000.
~212.26.18.41     0.0.0.0          16     -  1024    0     0.0    0.00  16000.

If these ntp servers are within your network then you can change the stratum values between 1- 15.

also you can refer this document.

https://supportforums.cisco.com/docs/DOC-1263

Regards,

Piyush Jain

Please rate helpful posts.

Highlighted

Hi,

did you configure the router as ntp server or you need to associate the router with ntp reference ?

212.26.18.43     0.0.0.0          16     -    64    0     0.0    0.00  16000.

~212.26.18.41     0.0.0.0          16     -  1024    0     0.0    0.00  16000.

are not accessible ?

HTH

Anas

please rate all helpful posts

Highlighted

Dear Anas

i configured as following :

clock timezone myzone +3 0

clock set xx:xx:xx 30 dec 2013

ntp master 5

there is some missing ?

Highlighted

Hello

Based on your configuration , you missed to configure ntp server.you have to use the below commands

ntp server 212.26.18.43

clock timezone myzone +3

ntp master 5

ntp source loopback 0                               if you take a reference for ntp , select loopback as stable interface.If you have other routers you can use it.

can you share wit us , if your ntp will be used for CME or CUCM?.

Thank you

please rate all useful information

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