So my previous post was completely wrong. Using the 10Gb an 1Gb ports at the same time is supported and works fine. It turns out that the ports were just ‘hung’. We simply had to reset them. {Frustrating} These are now responding and supporting our CIFS server. Thank you for your review and input on this.
We are preparing to migrate our primary NAS file system from a VNX7500 to a newer Isilon cluster. VNX file version is 7.1.76-4 and the array is no longer under EMC support.  Current NAS interface connections are just the 1Gb copper Ethernet ports. The datacenter deployed 10Gb relatively recently. To expedite the 30TB data migration, I would like to enable the 10Gb fiber ports this VNX has. However, we are having trouble getting the network to see the VNX 10Gb ports.  For simplicity, it is a standard configuration of Device fxg-1-0 (for both A and B data-mover sides) with the same Interface IP network configuration as the 1Gb connections. No virtual device configurations for FSN, truncking, and no VLAN Tagging.  There are link lights, the Network team has verified switch port configurations, and no port errors indicating week signal. However, the switches never see the VNX 10Gb port and it does not register in the arp table.  We have referenced "Configuring and Managing Networking on VNX" for this configuration, and searched community discussions. We have tested with Device fxg-1-0 and fxg-1-1 (A and B sides), and even a different IP network.  I would appreciate any suggestions as to what I could have missed or misconfigured in this.  Thank you, Bryan
Can't get 10Gb NAS connectivity