Hi,
Some pointers.
Following KB states: Any NetApp storage appliance (Not sure if that also means ESERIES) that utilizes a RJ45 console port, a DB-9 to RJ-45 adapter is required to utilize the RJ-45 console port.
Also take a look at this KB, very informative on RJ45 and console port:
https://kb.netapp.com/app/answers/answer_view/a_id/1036257
Please note: RJ45 serial console port to DB9 or USB to DB9 utilizes slower baudrate, so it should be - 9600-8-N-1. USB to USB can be higher.
I have only seen ESERIES in pictures, so I guess eseries netapp engineers will know this for sure.
Thanks!