![]() ![]() There still seems to be some weird issues with the VMware ESXi 5 Software ISCSI Initiator even after Update 1 (build 5.0.0, 623860)… So it might not be a bad idea to start with a new vSwitch (especially because you want the Storage Heartbeat needs to be the lowest numbered vmkernal port on that vswitch). I would highly recommend you setup the Storage Heartbeat port as per the recommendations outlined on this document (Needs to be the lowest numbered vmkernal port on the vSwitch, which means this port needs to be created first on the vSwitch, and also enable Jumbo Frames on it if you are using jumbo frames in your environment). I would highly recommend you read carefully “ Configuring iSCSI Connectivity with VMware vSphere 5 and Dell EqualLogic PS Series Storage“… When we first started working on this issue, this document was not even available (they still only had the best practices for vSphere 4.1). That being said, there are a number of things that can cause this issue so i'll try to include some troubleshooting steps that might be helpful in narrowing down cause of the issue in your particular environment. I'm not sure if the switch firmware has anything to do with it but I plan on opening up a TAC case soon to see what they say.Īfter working on this issue for over a month with EqualLogic Level 3 support, Dell PowerEdge Group (responsible for VMware issues within Dell) and Directly with VMware I think we might have found a resolution to this issue. This site is reporting proper flowcontrol on for the storage ports. ![]() That site has the same switches (Cisco 3750) but a slightly older firmware (12.2.55 vs 12.2.58). On a side note, I have a replica environment that has a PS6100 and Dell R710 hosts with Intel PT quad-port cards in it for failover (I'm using the same in the primary except it's a PS6500). I would suggest trying this if you haven't already. After I added the Storage Heartbeat VMK, my retransmits fell to <0.1% and my transfer rate is much higher. I was attributing this to the flowcontrol issue that Alex pointed out. ![]() ![]() For a while my retransmits in SAN HQ have been above normal (<1% but above 0.1% where it should be <0.1%). I did not have this configured (I am using the MEMs). Specifically it mentions the heartbeat VMK for iSCSI. So I've been working on this a lot today and I've made a little progress. ![]()
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