Here's the setup. We have an ESX Host, our ArcServ manager and 2 NetApp FAS2050s (3 filers total) on a vlan used for iSCSI traffic. Currently, we're only using iSCSI as the protocol to transfer our physical server backups to the netapp. The problem is, any traffic that is sent across this VLAN is ALWAYS broadcast to every port that is associated with this VLAN. Is this normal behavior? Our storage networks are compartmentalized enough and our current iSCSI usage is low enough that this isn't a crtical issue at this point. I'd prefer to assume this isn't normal and am wondering if anyone else has seen this behavior and has any idea what might be causing it?
After setting up the iSCSI connections, we did a fairly large dump of all of our current physical server backups to the netapp. During this transfer we noticed in our network usage monitor that every port associated with that VLAN had exactly the same amount of traffic going to it for the duration of the copy. We then verified what we believed was happening using wireshark on a separate port assigned that VLAN. The packets properly show the SRC and DST mac addresses and IP addresses for the transfers.
As far as we can tell, our iscsi vlan is setup exactly the same as our nfs vlan, but we see no issues with the nfs ports. I believe my coworker opened a ticket with Extreme Networks regarding this and we'll continue to hunt for the issue.