外网交换机配置公网NTP服务器，时间不同步

交换机可以Ping通公网服务器域名，但时间一直不同步

[1F-1#-WW-JR-A2-27U]dis cu | include  ntp

 clock protocol ntp

 ntp-service enable

 ntp-service unicast-server ***.***

 ntp-service unicast-peer ***.***

 ntp-service unicast-server ***.***

[1F-1#-WW-JR-A2-27U]dis cu | in

[1F-1#-WW-JR-A2-27U]dis cu | include  nds

[1F-1#-WW-JR-A2-27U]dis cu | include  dns

 dns server 202.100.96.68

[1F-1#-WW-JR-A2-27U]dis cu | in

[1F-1#-WW-JR-A2-27U]dis cu | include  clock

 clock timezone Beijing add 08:00:00

 clock protocol ntp

[1F-1#-WW-JR-A2-27U]display  ntp status

 Clock status: unsynchronized

 Clock stratum: 16 

 Reference clock ID: none

 Clock jitter: 0.000000 s

 Stability: 0.000 pps 

 Clock precision: 2^-23

 Root delay: 0.00000 ms 

 Root dispersion: 25.86365 ms 

 Reference time: 00000000.00000000  Mon, Jan  1 1900  8:05:52.000

 System poll interval: 8 s