After proper cabling the NetApp CN1610 cluster switches, you notice that joining the second node to a cluster fails because the node is not able to communicate
with the other node.
What would be the reason for this malfunction?

A.
CN1610 is unsupported in newer clustered Data ONTAP versions.

B.
The NTP server is not set.

C.
The FASTPATH version is not supported.

D.
The cluster switches must be Cisco switches for two or more nodes in a cluster.

Explanation:
Before you set up NetApp CN1610 cluster switches verify that you have the appropriate FASTPATH firmware and reference configuration file (RCF) versions for
your version of Data ONTAP.
Incorrect:
Not A, Not C: NetApp CN1610 will work fine. If you have an existing two-node switchless cluster environment, you can migrate to a two-node switched-cluster
environment using CN1610 cluster network switches.

Clustered Data ONTAP Switch Setup and Configuration Guide, page 15
http://www-01.ibm.com/support/docview.wss?uid=ssg1S7004655&aid=1