某局点时钟没有同步

现场配置了NTP服务，并且绑定了vpn实例，目前时钟无法同步，其他设备S6520相同的配置能同步成功

===============display clock=============== 

07:01:00.298 Asia/Shanghai Fri 10/13/2023

Time Zone : Asia/Shanghai add 08:00:00

检查配置没发现什么问题

#

clock timezone Asia/Shanghai add 08:00:00

clock protocol ntp mdc 1

# 

ntp-service enable

ntp-service peer acl 2100

ntp-service unicast-server 100.200.X.X vpn-instance management priority source M-GigabitEthernet1/0/0/0

ntp-service unicast-server 100.200.X.X vpn-instance management source M-GigabitEthernet1/0/0/0

#

acl number 2100

description ntp-server

rule 5 permit vpn-instance management source 100.200.X.X 0

rule 10 permit vpn-instance management source 100.200.X.X 0

ntp状态是同步的：

以下为10.13上午9：30时收集的debug信息：暂时未发现异常

<GX4-HLW-SW-Core>*Oct 13 01:27:11:072 2023 GX4-HLW-SW-Core NTP/7/PACKET_SEND: -MDC=1;

 packet to 100.200.104.41, length: 48

 leap: 0, version: 4, mode: 3, vrfindex: 1

 stratum:  4, poll: 6, precision: 2^-23

 rdel: 65.216, rdsp: 24.155, refid: 100.200.X.X

 reftime: e8d31b2d.12a625e4  Fri, Oct 13 2023  1:26:05.072

 orgtime: e8d31b2d.11faa179  Fri, Oct 13 2023  1:26:05.070

 rectime: e8d31b2d.12a625e4  Fri, Oct 13 2023  1:26:05.072

 xmttime: e8d31b6f.126b7b80  Fri, Oct 13 2023  1:27:11.071

*Oct 13 01:27:11:072 2023 GX4-HLW-SW-Core NTP/7/PACKET_RECV: -MDC=1;

 packet from 100.200.104.41 to 100.200.100.1 on M-GigabitEthernet1/0/0/0

 leap: 0, version: 4, mode: 4, vrfindex: 1

 stratum:  3, poll: 6, precision: 2^-24

 rdel: 64.911, rdsp: 19.241, refid: 203.107.X.X

 reftime: e8d318a9.30fa5f50  Fri, Oct 13 2023  1:15:21.191

 orgtime: e8d31b6f.126b7b80  Fri, Oct 13 2023  1:27:11.071

 rectime: e8d31b6f.11ed8ce7  Fri, Oct 13 2023  1:27:11.070

 xmttime: e8d31b6f.11f9619a  Fri, Oct 13 2023  1:27:11.070

 inptime: e8d31b6f.12903528  Fri, Oct 13 2023  1:27:11.072

*Oct 13 01:27:11:072 2023 GX4-HLW-SW-Core NTP/7/ACL: -MDC=1; Access restrict: 0x00000008.

*Oct 13 01:27:11:072 2023 GX4-HLW-SW-Core NTP/7/AUTH: -MDC=1; Received a packet at 31158739, from 100.200.104.41, mode 4, ky ID 00000000, length 48, authentication result 0

*Oct 13 01:27:11:072 2023 GX4-HLW-SW-Core NTP/7/PARAM: -MDC=1; Clock filter param: number 8, offset -0.001371, delay 0.00032, dispersion 0.003379, jitter 0.000818, burst 0

*Oct 13 01:27:11:073 2023 GX4-HLW-SW-Core NTP/7/SELECT: -MDC=1; endpoint -1, -0.063945

*Oct 13 01:27:11:073 2023 GX4-HLW-SW-Core NTP/7/SELECT: -MDC=1; endpoint -1, -0.057422

*Oct 13 01:27:11:073 2023 GX4-HLW-SW-Core NTP/7/SELECT: -MDC=1; endpoint  0, -0.001549

*Oct 13 01:27:11:073 2023 GX4-HLW-SW-Core NTP/7/SELECT: -MDC=1; endpoint  0, -0.001371

*Oct 13 01:27:11:073 2023 GX4-HLW-SW-Core NTP/7/SELECT: -MDC=1; endpoint  1, 0.054679

*Oct 13 01:27:11:073 2023 GX4-HLW-SW-Core NTP/7/SELECT: -MDC=1; endpoint  1, 0.060848

*Oct 13 01:27:11:073 2023 GX4-HLW-SW-Core NTP/7/SELECT: -MDC=1; peer 100.200.X.X, offset -0.001371, low -0.057422, high .054679, flags 00000421

*Oct 13 01:27:11:073 2023 GX4-HLW-SW-Core NTP/7/SELECT: -MDC=1; peer 100.200.X.X, offset -0.001549, low -0.057422, high .054679, flags 00000401

*Oct 13 01:27:11:073 2023 GX4-HLW-SW-Core NTP/7/SELECT: -MDC=1; Survivor 100.200.X.X, distance 3.007603

*Oct 13 01:27:11:073 2023 GX4-HLW-SW-Core NTP/7/SELECT: -MDC=1; Survivor 100.200.X.X, distance 4.008430

*Oct 13 01:27:11:073 2023 GX4-HLW-SW-Core NTP/7/SELECT: -MDC=1; Combine offset -0.001371479, jitter 0.000818399

*Oct 13 01:27:11:073 2023 GX4-HLW-SW-Core NTP/7/SYNCH: -MDC=1; Synchronized to peer 100.200.X.X

*Oct 13 01:27:11:073 2023 GX4-HLW-SW-Core NTP/7/SELECT: -MDC=1; Clock update at 31158739, sample 31158544, session ID 40934 offset -0.001371

*Oct 13 01:27:11:073 2023 GX4-HLW-SW-Core NTP/7/ADJUST: -MDC=1; Reset clock state, time count difference 10, state 5->5, pol 6, count -6, offset -0.001

*Oct 13 01:27:11:073 2023 GX4-HLW-SW-Core NTP/7/ADJUST: -MDC=1; Adjust local clock: offset -0.001371479 jitter 0.000470736 req -29.779 stab 0.006 poll 6

发现时区名称不符合规范

将Shanghai修改为shanghai即可