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тАО04-14-2014 06:38 PM
тАО04-14-2014 06:38 PM
I have a client migrating to a a Nimble SAN and once finished we are going to have 2 paths per ESXi server. This will be using the Qlogic QLE4062 iSCSI HBA.
Question is in the configuration of each HBA you can enable Arp Redirection. Do we do this with Nimble?
I have seen this be required for SAN's similar to Nimble's.
Solved! Go to Solution.
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тАО04-15-2014 05:58 PM
тАО04-15-2014 05:58 PM
SolutionThe Nimble best practice is to use a software iSCSI adapter however a hardware HBA will work. Also be cognizant that some hardware adapters provide less iSCSI connections than software adapters and I am aware of a customer that reverted to the software adapter to get to the higher number of connecitons.
According to Nimble support Nimble does not need ARP redirect so you can leave it off. One of my peers recently installed a Nimble array in a configuration that had a Qlogic 4062 ISCSI HBA with hardware initiator for ISCSI traffic. He pointed out that unlike a software adapter dynamic discovery wonтАЩt work and you have to use static discovery to pick up the Nimble volumes. Also a vSwitch was not required in this configuration since it was direct from initiator (w/ vmhba) to array target ports.
Hope this helps.
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тАО04-16-2014 08:48 AM
тАО04-16-2014 08:48 AM
Re: Qlgoic HBA & arp redirect
More for Nimble support
"To verify that the correct drivers are in use, flowcontrol will be on by default for ESXi. This can be checked from the ESXi server CLI using the following command.
ethtool --show-pause -vnicX
VMware's page is here and explains how to set flow control for the NIC.
If you can not set flow control for the NIC, or it is not automatically on, it is a very good indication that the driver is incorrect for the adapter/VNIC"
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тАО05-01-2014 09:28 AM
тАО05-01-2014 09:28 AM
Re: Qlogic HBA ARP Redirect
Note that the Qlogic represents itself only as an Storage HBA to ESXi and not as a network adapter.
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тАО05-01-2014 09:30 AM
тАО05-01-2014 09:30 AM
Re: Qlogic HBA ARP Redirect
I remember trying to use fancy Qlogic 10Gb cards with an iSCSI offload function and had the discovery issue too. With that 10Gb we went soft iSCSI. Since it was dedicated 10Gb nic for just the SAN.