Hi @MarcoBene So if I understand this correctly - you have a stack of 2 MS410-16's? If they're a stack then consider them as a single management plane. When you define your new L3 interfaces for your user devices, servers etc then these will be configured on the MS410 stack. Have a read through this: https://documentation.meraki.com/Architectures_and_Best_Practices/Cisco_Meraki_Best_Practice_Design/Best_Practice_Design_-_MS_Switching/General_MS_Best_Practices Layer 3 Features IP addressing and subnetting schema Dedicate /24 or /23 subnets for end-user access Avoid overlapping subnets as this may lead to inconsistent routing and forwarding L3 Interfaces Assign a dedicated management VLAN Avoid configuring a L3 interface for the management vlan. Use L3 interfaces only for data VLANs. This helps in separating management traffic from user data
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