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Problem with NTP Server

 
 
Ranga
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      04-24-2006
Hi,

I have enabled NTP Server on Windows 2000 Server and configured the
same as ntp server in my Routers ( 2550 Switch, 1720 Router, 7200
Router,2600). One the server I can see packets with port 123. Also on
Server i see the matches for NTP packets. Both Router and Server are on
same LAN and no ports are blocked. But the time is not getting
synchronised.
Can any one please help on this.

Thanks.

 
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AM
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      04-24-2006
Ranga wrote:

> Can any one please help on this.


You specified you have no ports blocked but do you have any ACL configured on any of those devices?
Moreover try to specify the source port for the NTP service:

ntp source <interface closest to the NTP server>

Let us know

A.
 
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Merv
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      04-24-2006
post output of

show version

show ntp assoc

show ntp status

 
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Hans-Dieter Kreutzner
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      04-24-2006
Ranga wrote:

> Hi,
>
> I have enabled NTP Server on Windows 2000 Server and configured the
> same as ntp server in my Routers ( 2550 Switch, 1720 Router, 7200
> Router,2600). One the server I can see packets with port 123. Also on
> Server i see the matches for NTP packets. Both Router and Server are on
> same LAN and no ports are blocked. But the time is not getting
> synchronised.
> Can any one please help on this.
>
> Thanks.


The MS timesrver supports only a SNTP subset - for full NTP on Windows, try
free tftpd32, its builtin NTP server works great in my lab. Using this one
means disabling the MS timeserver first.
http://tftpd32.jounin.net/

Hans
 
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Vladimir
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      04-24-2006
Synchronisation takes a while - sometimes 5 minutes
(maybe more). By patient...



Ranga wrote:
> Hi,
>
> I have enabled NTP Server on Windows 2000 Server and configured the
> same as ntp server in my Routers ( 2550 Switch, 1720 Router, 7200
> Router,2600). One the server I can see packets with port 123. Also on
> Server i see the matches for NTP packets. Both Router and Server are on
> same LAN and no ports are blocked. But the time is not getting
> synchronised.
> Can any one please help on this.
>
> Thanks.
>

 
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Ranga
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      04-26-2006
Hi Here it is:

sh ntp status
Clock is unsynchronized, stratum 16, no reference clock
nominal freq is 250.0000 Hz, actual freq is 249.9957 Hz, precision is
2**18
reference time is C7D14F69.48D8B8DB (23:05:37.284 IST Sun Mar 26 2006)
clock offset is 2678427478.0148 msec, root delay is 1.13 msec
root dispersion is 8564397.22 msec, peer dispersion is 16000.00 msec

show ver
Cisco Internetwork Operating System Software
IOS (tm) C3550 Software (C3550-I5Q3L2-M), Version 12.1(22)EA1, RELEASE
SOFTWARE
(fc1)
Copyright (c) 1986-2004 by cisco Systems, Inc.
Compiled Mon 12-Jul-04 09:21 by madison
Image text-base: 0x00003000, data-base: 0x0083AEF4

ROM: Bootstrap program is C3550 boot loader

GilatL3 uptime is 18 weeks, 4 days, 21 hours, 18 minutes
System returned to ROM by power-on
System restarted at 01:47:32 IST Sat Dec 17 2005
System image file is "flash:/c3550-i5q3l2-mz.121-22.EA1.bin"

cisco WS-C3550-48 (PowerPC) processor (revision H0) with 65526K/8192K
bytes of m
emory.
Processor board ID CAT0712Y0A8
Last reset from warm-reset
Bridging software.
Running Layer2/3 Switching Image

Ethernet-controller 1 has 12 Fast Ethernet/IEEE 802.3 interfaces

Ethernet-controller 2 has 12 Fast Ethernet/IEEE 802.3 interfaces

Ethernet-controller 3 has 12 Fast Ethernet/IEEE 802.3 interfaces

Ethernet-controller 4 has 12 Fast Ethernet/IEEE 802.3 interfaces

Ethernet-controller 5 has 1 Gigabit Ethernet/IEEE 802.3 interface

Ethernet-controller 6 has 1 Gigabit Ethernet/IEEE 802.3 interface

48 FastEthernet/IEEE 802.3 interface(s)
2 Gigabit Ethernet/IEEE 802.3 interface(s)

The password-recovery mechanism is enabled.
384K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address: 00:0C:31:69:A6:00
Motherboard assembly number: 73-5701-09
Power supply part number: 34-0967-01
Motherboard serial number: CAT071103J1
Power supply serial number: DCA07040J29
Model revision number: H0
Motherboard revision number: A0
Model number: WS-C3550-48-SMI
System serial number: CAT0712Y0A8
Configuration register is 0x10F


sh ntp associations

address ref clock st when poll reach delay offset
disp
~195.1.1.252 172.28.64.31 2 8 64 0 1.1 267842
16000.
* master (synced), # master (unsynced), + selected, - candidate, ~
configured

 
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Ranga
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      04-26-2006
here is the show version, sh ntp status and sh ntp asso output:

sh ntp status
Clock is unsynchronized, stratum 16, no reference clock
nominal freq is 250.0000 Hz, actual freq is 249.9957 Hz, precision is
2**18
reference time is C7D14F69.48D8B8DB (23:05:37.284 IST Sun Mar 26 2006)
clock offset is 2678427478.0148 msec, root delay is 1.13 msec
root dispersion is 8564397.22 msec, peer dispersion is 16000.00 msec

show ver
Cisco Internetwork Operating System Software
IOS (tm) C3550 Software (C3550-I5Q3L2-M), Version 12.1(22)EA1, RELEASE
SOFTWARE
(fc1)
Copyright (c) 1986-2004 by cisco Systems, Inc.
Compiled Mon 12-Jul-04 09:21 by madison
Image text-base: 0x00003000, data-base: 0x0083AEF4

ROM: Bootstrap program is C3550 boot loader

GilatL3 uptime is 18 weeks, 4 days, 21 hours, 18 minutes
System returned to ROM by power-on
System restarted at 01:47:32 IST Sat Dec 17 2005
System image file is "flash:/c3550-i5q3l2-mz.121-22.EA1.bin"

cisco WS-C3550-48 (PowerPC) processor (revision H0) with 65526K/8192K
bytes of m
emory.
Processor board ID CAT0712Y0A8
Last reset from warm-reset
Bridging software.
Running Layer2/3 Switching Image

Ethernet-controller 1 has 12 Fast Ethernet/IEEE 802.3 interfaces

Ethernet-controller 2 has 12 Fast Ethernet/IEEE 802.3 interfaces

Ethernet-controller 3 has 12 Fast Ethernet/IEEE 802.3 interfaces

Ethernet-controller 4 has 12 Fast Ethernet/IEEE 802.3 interfaces

Ethernet-controller 5 has 1 Gigabit Ethernet/IEEE 802.3 interface

Ethernet-controller 6 has 1 Gigabit Ethernet/IEEE 802.3 interface

48 FastEthernet/IEEE 802.3 interface(s)
2 Gigabit Ethernet/IEEE 802.3 interface(s)

The password-recovery mechanism is enabled.
384K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address: 00:0C:31:69:A6:00
Motherboard assembly number: 73-5701-09
Power supply part number: 34-0967-01
Motherboard serial number: CAT071103J1
Power supply serial number: DCA07040J29
Model revision number: H0
Motherboard revision number: A0
Model number: WS-C3550-48-SMI
System serial number: CAT0712Y0A8
Configuration register is 0x10F


sh ntp associations

address ref clock st when poll reach delay offset
disp
~195.1.1.252 172.28.64.31 2 8 64 0 1.1 267842
16000.
* master (synced), # master (unsynced), + selected, - candidate, ~
configured

 
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Merv
Guest
Posts: n/a
 
      04-26-2006
try using the ref clock at 172.28.64.31

no ntp server 195.1.1.252
ntp server 172.28.64.31

 
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