See: http://dev.zenoss.org/trac/ticket/4997

I had originally opened: http://dev.zenoss.org/trac/ticket/5376, 4997 partially addresses this.

Also see:

http://dev.zenoss.org/trac/ticket/5627

http://dev.zenoss.org/trac/ticket/5628

Which address other issues with interface monitoring that I had pointed out.

Basically, the interface status icons on the OS tab work based on events that are currently in the active event console.

To have the status on the OS tab accurately reflect the status of the interfaces you would need to follow the steps here:

docs/DOC-2494

But the event class for the new interface status isn't /Net/Link, I forget what it is, once I find out which class it is I'll modify that document so that it works with the interface status setup for 2.5.

(Just for the record, interface status was never actually properly reflected in the older versions of Zenoss with up to date status.  It only updated when the device was modeled.  That is going to change in King Crab.)

Zenoss is a good product and I know that all software have bugs but, for a product that claim to be "Enterprise", in my opinion this is a BIG and unacceptable defect. I'm an enterprise customer and I'll open a ticket hoping that this will be fixed asap.