Although ESRS is not a licensed feature, the OneFS cluster must be licensed for ESRS to be enabled.
When configured, ESRS monitors the Isilon cluster and sends alerts about the health of the devices. Isilon Technical Support personnel can establish remote sessions through SSH or the EMC back end interface. During remote sessions, support personnel can run remote support scripts that gather diagnostic data about cluster settings and operations. Diagnostic data is sent over the secure ESRS connection to EMC ESRS.
If you enable remote support, Isilon Technical Support personnel can establish a secure SSH session with the cluster through the ESRS connection. Remote access to the cluster is only in the context of an open support case. You can allow or deny the remote session request by Isilon Technical Support personnel.
A complete description of ESRS features and functionality is available in the most recent version of the EMC Secure Remote Services Technical Description. Additional ESRS documentation is available on EMC Support by Product.