Network uplink Redundancy Lost

I receive a network redundancy lost error on a ESXi 5.5 host even though there is no sign of a connection error.  The cable is connected and the switch port shows it is online.  There is a vSwitch configured to connect to a SAN.  There are 2 NIC's configured and both of them show up as online in the vCenter.  If I disconnect one of the NIC's from that vSwitch I get a "network connectivity lost" error.
NytroZAsked:
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Completely normal, you must have had a moment, where connection was down.
NytroZAuthor Commented:
I think I may have described the issue poorly.  I have an error that is persistant to one of my hosts.  Is says "network uplink redundancy lost".  Both nic's to the SAN are connected.  I also see partial/no redundancy in my storage view which leads me to believe that it detects one of the connections to the SAN as failed.  I only disconnected the cable from the NIC to see if I would receive a different error.

network-redund-error.png
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Have you cleared the error message, does it still appear as an alert ?

Have you checked both nics, and checked they are up and not down.
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NytroZAuthor Commented:
I checked both nic's and they are both up.  disconnecting either nic gives me a network connectivity lost error.  I recently did updates on the host server and was wondering if maybe I need to update the drivers on the nic now.  The error did not show up right after the ESX updates but more like a few days.
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
if you clear the error, does it still remain ?

check firmware, and drivers for the nics.

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NytroZAuthor Commented:
Clearing the error got rid of it.  Is it really that easy?
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Yes, the Alarms latch on, until you clear them.

So you've had a "spike" a nic has gone down, and the alarm is on. - until you clear or Acknowledge.
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