There should be a total of 5 IP addresses on a PS6000.    The Group IP address, which is an IP ALIAS that can appear to be on each PHYSICAL network interface.   Then the 4 physical port IP addresses.   That's all the IP addresses that should appear to be associated with the array.  
I ask it about storage (EqualLogicPS6000) which we conserve it and manage. I can confirm the IP address that we did not set when we refer to this storage in "snmpwalk".As a result of having asked Dell Co.Ltd., I receive an answer when "it is the IP address that a storage manages, and this IP address is harmless". However, these IP addresses are different every time when we inquire in snmpwalk.Therefore, I cannot distinguish a malicious IP address from a harmless IP address. We think that this is a problem of security.Please teach me the way to distinguish. Thanking you in advance.
About an unclear IP address of PS6000