交换机时间无法同步

型号S7503，Version 7.1.045, Release 7184，时间同步报错 “One-off system time adjustment failed. Error: No such file or directory ”

交换机与服务器连网络连通性正常，ntp 服务器正常。

一、display ntp-service status  显示  Clock status: synchronized

 Clock stratum: 3 

 System peer: 10.2.81.92 

 Local mode: client

二、display ntp-service trace 显示

Server     127.0.0.1

Stratum    3, jitter 0.0000, synch distance 0.0334.

Server 10.2.81.92: Timeout.

RefID      10.2.81.92

三、dis ntp-service sessions 显示

       source          reference       stra reach poll  now offset  delay disper

********************************************************************************

[12345]10.2.81.92      10.1.6.92          2   255   64   16 1.5497 2.2125 19.226

Notes: 1 source(master), 2 source(peer), 3 selected, 4 candidate, 5 configured.

一、配置如下：

 clock protocol ntp mdc 1

 ntp-service enable

 ntp-service peer acl 2000

 ntp-service unicast-server 10.2.81.92 priority source LoopBack0 version 3

===============

Basic ACL  2000, named -none-, 3 rules,

ACL's step is 5

 rule 0 permit source 10.2.81.92 0 (744 times matched)

 rule 1 permit source 10.2.1.25 0

 rule 5 deny

===============

Interface                     Physical Protocol IP Address      Description 

Loop0                         up       up(s)    10.2.1.25       LoopBack0...

二、debug 日志如下：

Jul  1 09:07:56:283 2025  NTP/7/PACKET_SEND: -MDC=1; 

packet to 10.2.81.92, length: 48 

 leap: 0, version: 3, mode: 3, vrfindex: 0 

 stratum:  3, poll: 6, precision: 2^-18 

 rdel: 33.569, rdsp: 1206712.997, refid: 10.2.81.92 

 reftime: ec0db32a.491225f5  Tue, Jul  1 2025  9:06:50.285 

 orgtime: ec0dae73.a6055ab2  Tue, Jul  1 2025  8:46:43.648 

 rectime: ec0db32a.491225f5  Tue, Jul  1 2025  9:06:50.285 

 xmttime: ec0db36c.485bef6b  Tue, Jul  1 2025  9:07:56.282 

*Jul  1 09:07:56:286 2025  NTP/7/PACKET_RECV: -MDC=1; 

 packet from 10.2.81.92 to 10.2.1.25 on LoopBack0 

 leap: 0, version: 3, mode: 4, vrfindex: 0 

 stratum:  2, poll: 6, precision: 2^-6 

 rdel: 31.250, rdsp: 44.037, refid: 10.1.6.92 

 reftime: ec0dae19.9a8bd3de  Tue, Jul  1 2025  8:45:13.603 

 orgtime: ec0db36c.485bef6b  Tue, Jul  1 2025  9:07:56.282 

 rectime: ec0daeb5.a6d58e3c  Tue, Jul  1 2025  8:47:49.651 

 xmttime: ec0daeb5.a6d58e3c  Tue, Jul  1 2025  8:47:49.651 

 inptime: ec0db36c.491996aa  Tue, Jul  1 2025  9:07:56.285 

*Jul  1 09:07:56:286 2025  NTP/7/ACL: -MDC=1; Access restrict: 0x00000008.

*Jul  1 09:07:56:286 2025  NTP/7/AUTH: -MDC=1; Received a packet at 51963800, from 10.2.81.92, mode 4, key ID 00000000, length 48, authentication result 0

*Jul  1 09:07:56:286 2025  NTP/7/PARAM: -MDC=1; Clock filter param: number 8, offset -1206.643295, delay 0.002334, dispersion 0.019450, jitter 0.006655, burst 0

*Jul  1 09:07:56:287 2025  NTP/7/SELECT: -MDC=1; endpoint -1, -1206.730229

*Jul  1 09:07:56:287 2025  NTP/7/SELECT: -MDC=1; endpoint  0, -1206.643295

*Jul  1 09:07:56:287 2025  NTP/7/SELECT: -MDC=1; endpoint  1, -1206.556362

*Jul  1 09:07:56:288 2025  NTP/7/SELECT: -MDC=1; peer 10.2.81.92, offset -1206.643295, low -1206.730229, high -1206.556362, flags 00000421

*Jul  1 09:07:56:288 2025  NTP/7/SELECT: -MDC=1; Survivor 10.2.81.92, distance 2.011719

*Jul  1 09:07:56:288 2025  NTP/7/SELECT: -MDC=1; Combine offset -1206.643295283, jitter 0.006654894

*Jul  1 09:07:56:288 2025  NTP/7/SYNCH: -MDC=1; Synchronized to peer 10.2.81.92

*Jul  1 09:07:56:289 2025  NTP/7/SELECT: -MDC=1; Clock update at 51963800, sample 51963603, session ID 44177, offset -1206.643295

*Jul  1 09:07:56:289 2025  NTP/7/ADJUST: -MDC=1; One-off system time adjustment failed. Error: No such file or directory