NoteIf the AMS is not on the same subnet as the SVM management IP addresses, theDiscovery server used as a proxy must reside on the same switch network broadcastdomain (Physical or VLAN), in order to allow seamless detection and MGMT IPaddress configuration of the SVM and ESXi IP addresses of all nodes in the system.The ScaleIO Data IP network requires 2 separate subnets.NoteMultiple IP subnets used for the ScaleIO data network cannot be on the same subnet.For more information, see this VMware limitation in the following link:http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2010877.Table 4 ScaleIO data IP network for Subnet #1Item Description CommentsN Number of nodesIP addresspool forSubnet #1The pools of IP addresses used for static allocation forthe following groups:1. Node_DATA1_IP = internal (interconnect) IPaddresses of the ScaleIO Ready Node servers2. SVM_DATA1_IP = ScaleIO Storage VM ManagementIP addresses3. MDM_Cluster_Virtual_IP_DATA1 = the Virtual IPaddresses of the MDM cluster in the "Data1" networkFor clarity, the firstsubnet is referred toas "Data1"The formula to calculate the subnet pool or subnet needs is: N*Node_DATA1_IP+N*SVM_DATA1_IP+MDM_Cluster_Virtual_IP_DATA1Table 5 ScaleIO data IP network for Subnet #2Item Description CommentsN Number of nodesIP addresspool forSubnet #2The pools of IP addresses used for static allocation forthe following groups:1. Node_DATA2_IP = internal (interconnect) IPaddresses of the ScaleIO Ready Node servers2. SVM_DATA2_IP = ScaleIO Storage VM ManagementIP addresses3. MDM_Cluster_Virtual_IP_DATA2 = the Virtual IPaddresses of the MDM cluster in the "Data2"networkFor clarity, thesecond subnet isreferred to as"Data2"The formula to calculate the subnet pool or subnet needs is: N*Node_DATA2_IP+N*SVM_DATA2_IP+MDM_Cluster_Virtual_IP_DATA2Network Architecture and Physical Connectivity38 Hardware Configuration and Operating System Installation Guide - ESXi Servers