I can only see luns on one port of my QLogic ISCSI HBA.
Posted on 2010-08-23
I have a question about a Qlogic Dual port iscsi HBA (QLE406c) setup within Vsphere 4.1 ESX, I hope someone maybe able to correct me where I have gone wrong.
I have trawled guides and help documents but can't seem to find anything that relates to my situation, most help files and setup procedures relate software ISCSI adapters and not Hardware ISCSI Adapters.
I have two hosts machines each with a Qlogic ISCSI HBA adapter in them, each port on both adapters has a fixed IP address within the same subnet. The SAN network is completely isolated from the production network, the SAN Storage device has two controllers also on the same subnet as the network
HOST1 QLOGIC HBA ISCSI port 1 192.168.2.1
HOST1 QLOGIC HBA ISCSI port 2 192.168.2.2
HOST2 QLOGIC HBA ISCSI port 1 192.168.2.3
HOST2 QLOGIC HBA ISCSI port 2 192.168.2.4
ISCSI SAN Storage Port 1 192.168.2.5
ISCSI SAN Storage Port 2 192.168.2.6
The SAN network comprises of two seperate physical network switches.
In switch 1 is HOST1 ISCSI port 1, HOST2 ISCSI port 1 and ISCSI SAN Storage Port 1
In switch 2 is HOST1 ISCSI port 2, HOST2 ISCSI port 2 and ISCSI SAN Storage Port 2
both switches are linked together but not stacked.
The LUNS on the ISCSI Storage device are avalible on both controllers so as to give redundancy.
This setup I believe will allow for the failure of either network switch or either controller on the SAN storage device.
On host1 in vsphere I add the scsi targets (192.168.2.5) and (192.168.2.6) in the dynamic discovery TAB of the Qlogic adapter Port 1. The LUNs created on the ISCSI storage Device are seen.
now for redunancy on host 1, if I try to add the same targets into port 2 of the Qlogic adapter it cannot see the LUNs at all.
I need the LUNs to be discovered on the second port to provide redunancy against a physical failure on any part of the network.
The situation is the same for HOST 2.
I'm not looking to do link aggregation, just multipathing.
I look forward to any helpful suggestions.