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Question about NTP..?

 
MohammadH
Regular Advisor

Question about NTP..?

Hi

we confugure NTP for switch E4800 and it working fine but after the update the switch to the latest update (A5500EI-CMW520-R2215) it stop working l don't why l try to confugure NTP again but still no use what l do ??

8 REPLIES
manuel.bitzi
Trusted Contributor

Re: Question about NTP..?

With 2215 NTPv4 was introduced. Could you send some outputs:

 

display ntp status

display ntp session

display version

 

 

br

Manuel

 

H3CSE, MASE Network Infrastructure [2011], Switzerland
MohammadH
Regular Advisor

Re: Question about NTP..?

Hi

thank you for reply

 

the outputs is

display ntp status:

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

Clock status: unsynchronized
Clock stratum: 16
Reference clock ID: none
Nominal frequency: 100.0000 Hz
Actual frequency: 100.0000 Hz
Clock precision: 2^18
Clock offset: 0.0000 ms
Root delay: 0.00 ms
Root dispersion: 0.00 ms
Peer dispersion: 0.00 ms
Reference time: 00:00:00.000 UTC Jan 1 1900(00000000.00000000)

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

display ntp session:

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

       source          reference       stra reach poll  now offset  delay disper
********************************************************************************
    [5]172.16.10.61    0.0.0.0           16     0   64    -    0.0    0.0    0.0
    [5]95.129.55.109   0.0.0.0           16     0   64    -    0.0    0.0    0.0
note: 1 source(master),2 source(peer),3 selected,4 candidate,5 configured
Total associations :  2

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

display version:

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

Switch 4800G 48-Port Software Version 5.20 Release 2215
Copyright (c) 2004-2012 3Com Corp. and its licensors. All rights reserved.
Switch 4800G 48-Port uptime is 0 week, 0 day, 19 hours, 44 minutes

Switch 4800G 48-Port with 1 Processor
256M    bytes SDRAM
32768K  bytes Flash Memory

Hardware Version is REV.C
CPLD Version is 002
Bootrom Version is 609
[SubSlot 0] 48GE+4SFP Hardware Version is REV.C
[SubSlot 1] 2 CX4 Hardware Version is REV.A
[SubSlot 2] 2 SFP+ Hardware Version is REV.A

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

this is the outputs.

 

thank you

Best regard

manuel.bitzi
Trusted Contributor

Re: Question about NTP..?

hmm ... i've checked it with my 5500 EI on R2215 and it works with the simply command "ntp-service unicast-server 95.129.55.109".

 

disp ntp stat
 Clock status: synchronized
 Clock stratum: 4
 Reference clock ID: 95.129.55.109
 Nominal frequency: 100.0000 Hz
 Actual frequency: 100.0000 Hz
 Clock precision: 2^17
 Clock offset: -6.9388 ms
 Root delay: 55.01 ms
 Root dispersion: 49.03 ms
 Peer dispersion: 39.02 ms
 Reference time: 10:05:19.145 UTC May 31 2012(D371C0DF.25212513)

 

whatsup your ntp configuration? ntp server software?

H3CSE, MASE Network Infrastructure [2011], Switzerland
MohammadH
Regular Advisor

Re: Question about NTP..?

Hi

My NTP configuration is :

l try this with  priority and with out it:

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

ntp-service unicast-server 172.16.10.61 priority
clock timezone KWT add 03:00

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

and  we use NTP server software (meinberg 4.2.4)

and still not working ?

 

Thank you

Best regard

manuel.bitzi
Trusted Contributor

Re: Question about NTP..?

Looks like an issue between the switch and your software. try to debug it:

 

<x>

terminal deb

terminal log

terminal mon

deb ntp-se packet

db ntp-se event

 

unconfig & reconfig ntp

 

br

Manuel

H3CSE, MASE Network Infrastructure [2011], Switzerland
MohammadH
Regular Advisor

Re: Question about NTP..?

Hi

I never use command debug before but l try it :

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

terminal deb

terminal log

terminal mon

deb ntp-se packet

db ntp-se event

 

unconfig & reconfig ntp

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

after l try it it give me :

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

*Apr 28 09:54:14:723 2000 IT-04 NTP/7/debug_NTP_packet_xmt:
 packet to 172.16.10.61
 leap: 3, version: 3, mode: 3, vrfindex: 0
 stratum: 0, poll: 64, precision: 2^18
 rdel: 0.000, rdsp: 0.000, refid: 0.0.0.0
 reftime: 00:00:00.000 UTC Jan 1 1900(00000000.00000000)
 orgtime: 00:00:00.000 UTC Jan 1 1900(00000000.00000000)
 rectime: 00:00:00.000 UTC Jan 1 1900(00000000.00000000)
 xmttime: 09:54:14.720 UTC Apr 28 2000(BCB3DE46.B87B56B8)

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

more then one but no working maybe l done something wrong what l do next ??

 

Thank you

Best Regard

manuel.bitzi
Trusted Contributor

Re: Question about NTP..?

Hi Mohammad

 

This is the first packet sent from the switch to the ntp-server. It looks as desired. But if there are really no other packets, the timeserver doesnt respond you.

 

Can you ping the timeserver from the switch? are there any logs on the timeserver? is a firewall between the switch and the timeserver?

 

btw: the last command is: debug ntp-se event

 

br

Manuel

H3CSE, MASE Network Infrastructure [2011], Switzerland
MohammadH
Regular Advisor

Re: Question about NTP..?

Hi