HP VC-Module : pauseFlood

The domain controller port issues this morning we caused by the active NIC being disconnected, however upon investigation I found the error message “Port was  disabled because a pause flood was detected”  from my Virtual connect System Logs.

The symptoms are the network card shows as “not connected” is “disconnected” – if you have no GUI you will need ifconfig for ESX/Xenserver

To confirm this Connect to the HP virtual Connect -> Hardware -> Click on InterConnect Bays -> Click Bay 1 or Bay 2 ->Verify the status under Server Ports tab. It displays the Port status of “Not Linked/Pause Flood Detected”. It confirms the issue was caused by pause Flood. In some cases, a flex-10 port can enter into disabled state due to the triggering of “pause-flood”, or network-loop.

This was the case on ST1W6043 – so now to fixing it, which required admin intervention:

Use putty to connect to the “VC” IP address and enter the command : show-port protect

You can see above that there are multiple ports “suspended” for pauseFlood, so to get these ports working use the command: reset port-protect

Then as you can see the faulted port is now fixed:

->show port-protect
Port Protection Features
=======================
Protection    State
Capability
=======================
networkLoop   Enabled
pauseFlood    Enabled


This usually occurs due to out of date drivers and firmware versions, but in the case of ST1W6043 it was SEP with a firewall policy which was causing an down state to often………hence the port got disabled.