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CE5855-48T4S2Q-EI NTP trace timeout

Created: Nov 4, 2020 05:06:21Latest reply: Nov 4, 2020 06:25:41 613 11 0 0 0
  HiCoins as reward: 0 (problem unresolved)

HI All


I'm configured NTP detail as below :

        ntp ipv6 server disable

        ntp refclock-master 4

        ntp unicast-server 10.223.38.1 source-interface Vlanif998 preferred

        ntp unicast-server 10.223.38.54 source-interface Vlanif998

went i display ntp status it's show :

        <H5855>dis ntp status

         clock status: synchronized

         clock stratum: 3

         reference clock ID: 10.223.38.1

         nominal frequency: 100.0000 Hz

         actual frequency: 100.0002 Hz

         clock precision: 2^16

         clock offset: -520.9136 ms

         root delay: 60.96 ms

         root dispersion: 257.21 ms

         peer dispersion: 59.97 ms

         reference time: 04:52:54.500 UTC Nov 4 2020(E34CB226.7FFFFFFF)

        synchronization state: spike (clock will be set in 197 secs)

        <H5855>


i found synchronization state: spike. And went i try to display ntp session it's show: 

        <H5855>dis ntp session

         clock source: 127.127.1.0

         clock stratum: 2

         clock status: configured, insane, valid

         reference clock ID: LOCAL(0)

         reach: 255

         current poll: 64

         now: 45

         offset: 0.0000 ms

         delay: 0.00 ms

         disper: 1.21 ms


         clock source: 10.223.38.54

         clock stratum: 2

         clock status: configured, selected, sane, valid

         reference clock ID: 223.255.185.2

         reach: 255

         current poll: 1024

         now: 844

         offset: 164.2286 ms

         delay: -0.04 ms

         disper: 42.40 ms


         clock source: 10.223.38.1

         clock stratum: 2

         clock status: configured, master, sane, valid

         reference clock ID: 223.255.185.2

         reach: 255

         current poll: 64

         now: 64

         offset: -368.2600 ms

         delay: -0.02 ms

         disper: 1.20 ms

        <H5855>


I found clock source: 10.223.38.1 and 10.223.38.54 have reference clock ID: 223.255.185.2. So went i try to display ntp trace it's show: 

        <H5855>dis ntp trace

         server 127.0.0.1, stratum 3, offset -0.2960 s, synch distance 0.333

         server 10.223.38.1, stratum 2, offset -0.2285 s, synch distance 0.096

         223.255.185.2:       *Timeout*

        <H5855>


This switch can't outgoing to internet. Can i fix this issue ?


Featured Answers

Recommended answer

chenhui
Admin Created Nov 4, 2020 06:25:41

Hi,
You mean the ntp trace timeout? As you said, CE5855 cannot access the internet, so the ntp trace to the 223.255.185.2 failed is normal.
View more
  • x
  • convention:

WATTA
WATTA Created Nov 4, 2020 06:37:47 (0) (0)
Hi Chenhui

     i have some question when i ntp trac server 10.223.38.1,offset is very low but when i display ntp status or ntp session why clock offset is very high
How i can fix it ?  
chenhui
chenhui Reply WATTA  Created Nov 4, 2020 06:48:45 (0) (0)
Hi,
NTP server 10.223.38.1 syncronize the time to the reference clock ID 223.255.185.2, which means all the switches will syncronize to this NTP server. The offset value displayed from the output of command display ntp status indicates the value to the 223.255.185.2.
Example https://support.huawei.com/hedex/hdx.do?docid=EDOC1100020548&id=dc_cfg_ntp_0023&lang=en might help you clear the difference between that two value.  
WATTA
WATTA Reply chenhui  Created Nov 4, 2020 07:09:57 (0) (0)
Hi
that's clear
i have new question. the clock offset value in display ntp status is related with display ntp trace or not ?
As above i try to display ntp status it's show reference clock ID: 10.223.38.1 and the clock offset: -520.9136 ms but when i try to ntp trace it's show server 10.223.38.1, stratum 2, offset -0.2285 s
i'm not clear in this issue  
chenhui
chenhui Reply WATTA  Created Nov 4, 2020 11:41:07 (0) (0)
Hi,
The offset displayed in the output of command display ntp status is the offset between the local system clock and the NTP server, while the offset displayed in the output of command display ntp trace is offset to the superior reference clock. In your situation, I think, that first offset value is the difference between the CE switch and 223.255.185.2, and the second one is the difference between the CE and 10.223.38.1 itself.  
WATTA
WATTA Reply chenhui  Created Nov 5, 2020 02:01:14 (0) (0)
Hi,
" In your situation, I think, that first offset value is the difference between the CE switch and 223.255.185.2 "
That mean why i recive NTP spike in NTP status right ?
How i can fix the NTP spike ? because i think this is the root cause of ntp state change in my CE switch.  
chenhui
chenhui Reply WATTA  Created Nov 5, 2020 08:22:51 (0) (0)
Is it possible to check the NTP status on 10.223.38.1? CE5855 syncronize the time to 10.223.38.1, and 10.223.38.1 synchronize time to 223.255.185.2, is the offset value on 10.223.38.1 also big?  
WATTA
WATTA Reply chenhui  Created Nov 6, 2020 04:50:19 (0) (0)
Hi,
I check NTP status on 10.223.38.1 the offset value less than 2ms  
chenhui
chenhui Reply WATTA  Created Nov 6, 2020 06:48:22 (0) (0)
The offset between the CE5855 and 10.223.38.1 exceed 128ms, which cause the time synchronizing failure. Can you please help to check the configuration on both end?  
chenhui
chenhui Reply WATTA  Created Nov 6, 2020 07:12:17 (0) (0)
Can the CE5855 syncronize the ime to 10.223.38.1?  
All Answers
Hi, we are working on it now.
View more
  • x
  • convention:

Hi,
You mean the ntp trace timeout? As you said, CE5855 cannot access the internet, so the ntp trace to the 223.255.185.2 failed is normal.
View more
  • x
  • convention:

WATTA
WATTA Created Nov 4, 2020 06:37:47 (0) (0)
Hi Chenhui

     i have some question when i ntp trac server 10.223.38.1,offset is very low but when i display ntp status or ntp session why clock offset is very high
How i can fix it ?  
chenhui
chenhui Reply WATTA  Created Nov 4, 2020 06:48:45 (0) (0)
Hi,
NTP server 10.223.38.1 syncronize the time to the reference clock ID 223.255.185.2, which means all the switches will syncronize to this NTP server. The offset value displayed from the output of command display ntp status indicates the value to the 223.255.185.2.
Example https://support.huawei.com/hedex/hdx.do?docid=EDOC1100020548&id=dc_cfg_ntp_0023&lang=en might help you clear the difference between that two value.  
WATTA
WATTA Reply chenhui  Created Nov 4, 2020 07:09:57 (0) (0)
Hi
that's clear
i have new question. the clock offset value in display ntp status is related with display ntp trace or not ?
As above i try to display ntp status it's show reference clock ID: 10.223.38.1 and the clock offset: -520.9136 ms but when i try to ntp trace it's show server 10.223.38.1, stratum 2, offset -0.2285 s
i'm not clear in this issue  
chenhui
chenhui Reply WATTA  Created Nov 4, 2020 11:41:07 (0) (0)
Hi,
The offset displayed in the output of command display ntp status is the offset between the local system clock and the NTP server, while the offset displayed in the output of command display ntp trace is offset to the superior reference clock. In your situation, I think, that first offset value is the difference between the CE switch and 223.255.185.2, and the second one is the difference between the CE and 10.223.38.1 itself.  
WATTA
WATTA Reply chenhui  Created Nov 5, 2020 02:01:14 (0) (0)
Hi,
" In your situation, I think, that first offset value is the difference between the CE switch and 223.255.185.2 "
That mean why i recive NTP spike in NTP status right ?
How i can fix the NTP spike ? because i think this is the root cause of ntp state change in my CE switch.  
chenhui
chenhui Reply WATTA  Created Nov 5, 2020 08:22:51 (0) (0)
Is it possible to check the NTP status on 10.223.38.1? CE5855 syncronize the time to 10.223.38.1, and 10.223.38.1 synchronize time to 223.255.185.2, is the offset value on 10.223.38.1 also big?  
WATTA
WATTA Reply chenhui  Created Nov 6, 2020 04:50:19 (0) (0)
Hi,
I check NTP status on 10.223.38.1 the offset value less than 2ms  
chenhui
chenhui Reply WATTA  Created Nov 6, 2020 06:48:22 (0) (0)
The offset between the CE5855 and 10.223.38.1 exceed 128ms, which cause the time synchronizing failure. Can you please help to check the configuration on both end?  
chenhui
chenhui Reply WATTA  Created Nov 6, 2020 07:12:17 (0) (0)
Can the CE5855 syncronize the ime to 10.223.38.1?  

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