I admit the naming convention is a little confusing.  When the ESRS product was first introduced in January 2006, it was called EMC Secure Remote Support Gateway or ESRS Gateway.  We sometimes refer to it as ESRS 1.  It was a general purpose solution that supported most of the EMC products available.  The second generation of the product (ESRS 2) was introduced in July 2010 and the name was changed to EMC Secure Remote Support IP Solution or ESRS IP Solution.  The idea was to refer to ESRS 1 as ESRS Gateway and ESRS 2 as ESRS IP Solution.  In actuality, most people refer to the current product as ESRS Gateway and that's probably from habit and to differentiate between it and the later products that were introduced with "IP Client" in their names.   The ESRS IP Client for CLARiiON was introduced in July, 2010 and was designed to only manage CLARiiON devices.  The ESRS IP Client for VNX was introduced later and manages legacy CLARiiON and VNX.  We have since released ESRS Device Client for Symmetrix and VNXe Device Client.  The device clients are designed to manage a single product.  Since you already have the ESRS Gateway, it would not be necessary to install the IP Client for CLARiiON/VNX.
Hello, I open this discussion to clear some points. If I understand correctly ESRS GW and ESRS IP Client are two different SWs. What is the difference between ESRS IP client and ESRS GW?  I have installed ESRS GW. It is monitored DMX box.  Is it needed to install ESRS IP over ESRS GW machine to monitor clarion CX box?
What is the difference between ESRS IP client and ESRS GW?