For my development environment, I have 2 servers running ESXi 5.1. I have multiple datastores configured, 1 of which is a Synology RS812RP+. NAS device. I have some iSCSI targets set up on this device, 2TB each. This device has 2 NICs, both of which are plugged into our Dell Force10 switches (used only for iSCSI traffic). The MTU on the NAS is set to 9000. I go thorugh my ESXi and attach to the storage, create the datastores. I can browse them, run virtual machines from them - everything seems to function fine.
After the datastores are connected for a while (last night it proved to be about 45 minutes) - I start getting alarm emails from vCenter - saying that the redundancy paths to my storage device (the synology) have been degraded. Path is down.
I also have a Equallogic SAN PS5000 and PS4100 connected to this environment. I am only getting these email alarms when the synology is connected.
Has anyone else seen this? What would cause this?
Thanks in advance
sb