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configure a Cisco 2960G for optimal ISCSI Performance

Hello I have a Single Netapp 2020 SAN. I want to use the SAN in combination with a Cisco WS-C2960G-24TC-L switch. besides the obvious administrative commands are there any recommended commands I should run on the switch to optimize SCSI performance?
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jbla9028
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jbla9028
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Paul SolovyovskyCommented:
Couple of things you can do.  I have setup many of the FAS2020s and 2960G.

Are you running two controllers on the Netapp? One or two 2960s?  

You could enable jumbo frames on Netapp, switches, virtual hosts.

What are you running..CIFS, NFS, ISCSI on the Netapp?  What type of hosts are you running for virtualization?
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jbla9028Author Commented:
Right now I'm just going to run the FAS2020 on 1 2960G switch. I have 1 head on the SAN. The hosts will currently just be ISCSI windows 2008 machines. no VMWare boxes on this SAN at the moment..

 
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Paul SolovyovskyCommented:
Are you using software or hardware iSCSI initiators?
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jbla9028Author Commented:
Software based.
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Paul SolovyovskyCommented:
Since the 2020 only has two nics you have probably configured a VIF, you can manage the 2020 through the BMC.

On the switch create two VLANs, the one for iSCSI should not be routed.  You should configure the FAS, the SAN, and the servers for jumbo frames.

Check FAS notes and see if you can enable multipathing on software iscsi, if so then do it (assuming you have two nics for iscsi on the windows hosts)

Unless you have multipathing you will not be able to use more than a single nic worth of throughput since etherchannel (should be configured on the switch ports as well) will be an IP to IP connection (iscsi initiator to iscsi target) and thus not going beyong a single physical connection.  Multipath will allow you use both nics.

Configure snapdrive on the windows hosts, it will make your life much easier..if you have the licenses.
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eeRootCommented:
Set up an isolated/non-routed VLAN for the SAN to keep traffic off of the rest of the network.  Increase the MTU to 9000, or greater.  And if possible, set up a monitoring tool to watch the switch ports and alert you if the traffic exceeds a certain amount.  For example, get an email if the port utilization goes over 75% for more then 5 minutes
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jbla9028Author Commented:
if I use NIC TEAMing is that not recommended? IE I have a dell R710 and I teamed 2 NICs together that are connecting to the SAN. is it better to just break the team, issue and IP address on each NIC and setup the multipathing?
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Paul SolovyovskyCommented:
Unless you configure Multipath for the SAN side it will only use a single nic of the team, basically failover.  Keep the team but setup multiple vmkernel ports.  Link below offers some insight.  It's for lefthand but essentialy the same for all software iscsi

http://www.scribd.com/doc/24586958/Configuring-Left-Hand-ISCSI-and-VSPHERE-MPIO
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jbla9028Author Commented:
I'm using straight windows 2008. No VMWare. I have a server with just windows 2008 installed and I'm using the microsoft ISCSI initiator that windows 2008 comes with.
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Paul SolovyovskyCommented:
my mistake.  I wouldn't team the nics I would configure each one a seperate IP and use the MPIO in MS iSCSI initiator.  Check best practice
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jbla9028Author Commented:
excellent. Thanks.
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