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Nexus 9k: NTP works only as v2 and not v3/v4

Nadav
Level 7
Level 7

Hi all,

 

I have a Nexus 9k switch running the latest 9.3.3 NX-OS software. It's querying a modern Cisco router which is acting as an NTP server. This NTP server communicates with dozens of various other devices at either NTP v3 or v4 depending on their capability.

 

The Nexus 9k works as NTPv2 with the NTP server for some reason. I tried it with an ACL and without, with authentication and without... very odd stuff. I've determined that it's NTPv2 via packet capture which shows that the server and client are communicating in v2 even though the server is also communicating with other devices in v3 and v4.

 

Any ideas what might be causing it? Is the N9k platform really limited to NTPv2?

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