NTP

Some Basic #PowerCLI using foreach to modify #NTP and do #ESXi host backups #vExpert

February 6, 2019 Bilal Ahmed 0

You will have seen my earlier post about learning PowerShell, and now I am using what I think is one of the best things about PowerShell……The foreach loop. I have seen it used many times, and never fully understood it, I kind of got what it did, but now I am getting it into my head and I have been using it to try and various things. So I have been doing more bits in PowerCLI to help improve my scripting skills and just to see if I can make my life easier. Modifying NTP settings on multiple ESXi hosts There is a known bug in PowerCLI 10 where Remove-VMHostNtpServer looks like it has worked, but does not actually do […]

VCSA 6.5 AD Lookup Issues #DNS #DIG #VMware #vExpert #VCSA #vCenter

April 26, 2018 Bilal Ahmed 0

So, I have been deploying a new 6.5 VCSA as part of my plan to move away from the current 5.5 deployments I am working with (a post for another time). During testing of this new deployment, I had a user come to me with a strange error. When they changed their AD password, they lost all access to the VCSA, but everything else for them worked fine, they could log in to anything else using their AD account. I could log into the VCSA fine and other users could still log in fine too. We cleared the web cache among other things, but to no joy. I couldn’t really see anything that was wrong. A few web posts mentioned that […]

Very persistent NTP issues on VCSA and PSC appliances

May 11, 2017 Kim Bottu 3

For the 2 weeks I had been having very annoying NTP sync issues on some of my VCSA and PSC appliances in one of the datacenters. While my SSO domain and vCenter enhanced linked mode were for the most part working properly, it still bugged me that the NTP clocks on my PSC and VCSA in datacenter 1 were properly syncing with the NTP source (windows NTP source), but the NTP time on my PSC and VCSA in datacenter 2 were always off with somewhere between 3 to 7 minutes with the clocks of all my other appliances and Windows VM’s.  They did how ever sync properly with each other.  (For trouble shooting purposes, I pointed all appliances to a single NTP source in a single […]

vCNS 5.5 to NSX 6.2.3 upgrade – vCenter Lookup Not connecting

June 29, 2016 Kim Bottu 1

Yesterday I performed a vCNS 5.5 upgrade to NSX 6.2.3. I did run into issues later on the day thanks to NTP, there is a small gotcha here even if you had set it up correctly! The environment: vCenter 5.5 VCSA + embedded SSO ESXi 5.5 vCNS 5.5 ( vShield Manager + vShield APP Firewalls) some VMs ( including DHCP and Domain Controller) NTP running from a Windows Server   Performing the upgrade of vCNS is pretty straight forward:   Download the NSX upgrade package: VMware-vShield-Manager-upgrade-bundle-to-NSX-6.2.3-3979471.tar.gz. Open the vCNS vShield Manager Go to Updates and Upload Upgrade Bundle After the upgrade you might end up with a web interface which looks like a mix of vCNS and NSX. Flush the […]