topic Re: NTP Services Restart - VDX VCS_Logical Chassis in Data Center (VDX)

NTP Services Restart - VDX VCS_Logical Chassis

TL — Tue, 20 May 2025 23:01:01 GMT

Greetings - We have approx a half dozen groups of VDX chassis (6740F, 6740-T) configured as VCS_Logical Chassis - each with 4-6 nodes.

Two of the VCS are showing mismatched timestamps between the primary node of the VCS and all the other nodes in that group - the others being (4) hours ahead - as if the NTP configuration is not being distributed to all the nodes in the VCS.

We use the same NTP configuration across all of our VCS groups - and the others are not exhibiting the issue. We tried completely removing and re-adding the NTP config, but the condition persists.

*Is there any way to recycle the NTP services on a VCS - without a reboot?

Re: NTP Services Restart - VDX VCS_Logical Chassis

Truyen_Phan — Wed, 21 May 2025 17:17:47 GMT

Hello,

Please confirm if the timezone is set the same for all VDX as it's set per RB:

VDX1# sh run rb clock
rbridge-id 1
clock timezone America/Los_Angeles
!
rbridge-id 2
clock timezone America/Los_Angeles
!

There are no user level commands to restart the NTP service. You can try removing the NTP server configuration, then setting it to a dummy IP (ex. 192.168.0.1) which will update the config. Then, remove it again and re-enter the correct NTP server configuration. After, the principal RB will then push a time sync to the rest of the VCS.

Re: NTP Services Restart - VDX VCS_Logical Chassis

TL — Thu, 22 May 2025 19:08:00 GMT

We completely removed the NTP and re-added it - still not correct. The primary node would not disseminate it. We manually set the Timezone on each of the nodes and that seemed to work - but it reverted (on the nodes that were not primary).

*But, we did not try stripping the NTP config and re-adding it with a dummy IP.