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.