Problem with NTP Server

Discussion in 'Cisco' started by Ranga, Apr 24, 2006.

  1. Ranga

    Ranga Guest

    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.
     
    Ranga, Apr 24, 2006
    #1
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  2. Ranga

    AM Guest

    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.
     
    AM, Apr 24, 2006
    #2
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  3. Ranga

    Merv Guest

    post output of

    show version

    show ntp assoc

    show ntp status
     
    Merv, Apr 24, 2006
    #3
  4. 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
     
    Hans-Dieter Kreutzner, Apr 24, 2006
    #4
  5. Ranga

    Vladimir Guest

    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.
    >
     
    Vladimir, Apr 24, 2006
    #5
  6. Ranga

    Ranga Guest

    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
     
    Ranga, Apr 26, 2006
    #6
  7. Ranga

    Ranga Guest

    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
     
    Ranga, Apr 26, 2006
    #7
  8. Ranga

    Merv Guest

    try using the ref clock at 172.28.64.31

    no ntp server 195.1.1.252
    ntp server 172.28.64.31
     
    Merv, Apr 26, 2006
    #8
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