Does this NetApp have a BMC module? Different controller models have different out-of-band management (OOB) modules. The OOB module could be called bmc, sp or rlm. I would recommend typing the following commands into the console:
rlm status bmc status sp status
This should help you identify which type of module the NetApp is using. It should also provide you with the IP address information for the interface as well as a link status. If autosupport is configured on the NetApp and the RLM/BMC/SP is authorized to send email through the outbound email server, you should be able to replace "status" with "test" to confirm that the interface can access the network.
After that, I recommend confirming basic IP connectivity.
1. Does the RLM/BMC/SP respond to ping? If not, is the switch port 10/100Mbps (most OOB interfaces today only support 10/100Mbps). Are the IP address, netmask, and gateway correct? Etc.? 2. Are you connecting via SSH (RLM/BMC/SP modules do not support telnet)