piedthepiper
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VM Networking question
So guys,
I came across this config on a host and it puzzled me a bit. How could all the VMs attached to this vSwitch, still be getting network connectivity ?
My initial guess is that once the vms were using a vmnic, then someone will have put all the uplinks into standby mode made they stayed connected?
The host is running ESXi 5.1
standbynics_edited.png
I came across this config on a host and it puzzled me a bit. How could all the VMs attached to this vSwitch, still be getting network connectivity ?
My initial guess is that once the vms were using a vmnic, then someone will have put all the uplinks into standby mode made they stayed connected?
The host is running ESXi 5.1
standbynics_edited.png
that is a possible theory, use esxtop and this will confirm, which VMs are using which uplink.
why someone would put all nics into standby is beyond me!
why someone would put all nics into standby is beyond me!
ASKER
Esxtop showed the vms using various up links out of the 4.
When you set them all as standby vcenter warns you that you have no active up links.
So my guess is that since the physical ports are active, putting them in standby mode on the vswitch makes no difference on the vswitch as they are connected to the physical layer fine.
They are always up and as such the vms will use them
What a bizzare config
When you set them all as standby vcenter warns you that you have no active up links.
So my guess is that since the physical ports are active, putting them in standby mode on the vswitch makes no difference on the vswitch as they are connected to the physical layer fine.
They are always up and as such the vms will use them
What a bizzare config
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D'oh! Didn't even notice the NICs in standby....
ASKER
Absolutely it is nowhere near best practice, whoever set this up needs a talking to. I changed them all to active/active right away.
I wish I knew the thought process involved!
I wish I knew the thought process involved!
Similarly, a vSwitch might have 255 virtual ports and four physical uplink ports.