vCenter local login while DNS not available

[flokuek]

Hi all,

I've got two questions below which occurred to us this morning.

1. Login with local creds into vCenter did not work while DNS was unavailable

So this morning our DNS servers which were set on the vcenter appliance had an outage. We wanted to login to the vcenter using the  administrator @ vsphere.local but that failed. We then changed the dns servers on the appliance to a working dns server and et voila it worked. So that let's me wonder why we even have local creds if they don't work if DNS is not available.. am I missing something here?

2. While we had the DNS outage we jumped on one of the ESXi hosts and wanted to restart a VM which had multiple network adapters attached. Post reboot 3 out of 5 adapter would not connect. Adding or editing adapters failed with the following error: Addition or reconfiguration of network adapters attached to non-ephemeral distributed virtual port groups (VM-PROD) is not supported. Once we gained back access to vCenter we were able to connect the adapters. That also let's me wonder why we couln't connect those from the Host itself?

Thanks in advance!

[IRIX201110141]

2.
Because the default option when creating a portgroup on a vDS is from type "static binding" which is not manageable directly by an ESXi it self. To avoid that problem you should at least have the portgroup where your VCSA and other important infrastructure VMs are connected need a "ephemeral" one.

 

Regards,
Joerg

[flokuek]

 Thanks for explaining! Appreciated.