I have an implementation using Etherchannel VIFs for iSCSI with VMware that in the main works OK. However my a larger data set say 300GB is copied to a VM vCenter alerts for latency between 200 and 500ms for disk writes.
The NetApp shows no such latency through System Manager and sysstat -u shows CPU and Disk at a 60% maximum suggesting this is correct. ESXTOP does show the latency is real inside the VM.
The network people say the network is fine and not showing errors though iSCSI is shared on stacked Cisco 3750 switches.
Has anybody seen this before using such a configuration as per TR3749?