Posted on March 22, 2021 3:54 am
 |  Asked by Baek SongWoo
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Hi Team

NTP status does not change from Starting after we set up NTP.

Why doesn’t NTP work?

Below is our TEST information. Please keep in mind.

ntp server vrf NMS_VRF prefer source Loopback11
ntp server vrf NMS_VRF source Loopback11
ntp serve all vrf NMS_VRF
interface Loopback11
ip address
ntp serve

show ntp associations
NTP starting…
remote refid st t when poll reach delay offset jitter

ping vrf NMS_VRF source
PING ( from : 72(100) bytes of data.
80 bytes from icmp_seq=1 ttl=64 time=0.737 ms
80 bytes from icmp_seq=2 ttl=64 time=0.413 ms
80 bytes from icmp_seq=3 ttl=64 time=0.391 ms
80 bytes from icmp_seq=4 ttl=64 time=0.384 ms
80 bytes from icmp_seq=5 ttl=64 time=0.381 ms

Posted by Naveen Chandra
Answered on March 22, 2021 4:38 am

Hi Baek,

Thanks for writing to the forum. Could you please make sure that the UDP port 123 is open in both directions, throughout the path from your switch to the remote NTP servers you wish to synchronize with?



Posted by Baek SongWoo
Answered on March 25, 2021 9:50 am

Thank you for your answer.
Verified that the udp 123 port is open from the switch to the remote NTP server.

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