多租户 iPSK 子网与 DHCP 作用域设计器
使用 Identity Pre-Shared Keys 为公寓和学生住宅网络规划 IP 分配和 DHCP 参数。
规划您的子网分配
1. Base IP address block
Enter the starting private IPv4 subnet block (RFC 1918) for the building estate.
2. Number of units
3. Expected devices per unit
10 Devices4. Starting VLAN ID
Base VLAN tag for 802.1Q trunkingSizing 100 units with up to 10 devices each requires 16 IPs per unit (/28 subnet). Your parent pool reserves 2,048 total IP addresses.
Subnet allocation map preview (First 6 of 100 units)
Download the full CSV or JSON file above to obtain all 100 unit records.
| Unit identifier | Subnet CIDR | Gateway IP | Usable DHCP pool range | Broadcast IP | VLAN ID |
|---|---|---|---|---|---|
| Apartment 1 | 10.0.0.0/28 | 10.0.0.1 | 10.0.0.2 - 10.0.0.14 | 10.0.0.15 | VLAN 101 |
| Apartment 2 | 10.0.0.16/28 | 10.0.0.17 | 10.0.0.18 - 10.0.0.30 | 10.0.0.31 | VLAN 102 |
| Apartment 3 | 10.0.0.32/28 | 10.0.0.33 | 10.0.0.34 - 10.0.0.46 | 10.0.0.47 | VLAN 103 |
| Apartment 4 | 10.0.0.48/28 | 10.0.0.49 | 10.0.0.50 - 10.0.0.62 | 10.0.0.63 | VLAN 104 |
| Apartment 5 | 10.0.0.64/28 | 10.0.0.65 | 10.0.0.66 - 10.0.0.78 | 10.0.0.79 | VLAN 105 |
| Apartment 6 | 10.0.0.80/28 | 10.0.0.81 | 10.0.0.82 - 10.0.0.94 | 10.0.0.95 | VLAN 106 |
Wireless controller configuration generator
Select your network hardware stack to produce ready-to-deploy CLI commands and JSON profiles.
# Cisco Meraki MX Security Appliance DHCP & Dynamic VLAN Configuration
# Property Profile: Multi-Tenant Residential WiFi (VLANs 101 to 200)
# WPA2 / WPA3 Enterprise SSID with Identity Pre-Shared Keys (iPSK)
# RADIUS Dynamic VLAN Attribute: Tunnel-Private-Group-ID
# Sample per-unit DHCP scopes (Units 1 to 6):
vlan_101:
name: "Apartment_1"
id: 101
appliance_ip: "10.0.0.1"
subnet: "10.0.0.0/28"
netmask: "255.255.255.240"
dhcp_handling: "Run a DHCP server"
dhcp_lease_time: "1 day"
dhcp_start: "10.0.0.2"
dhcp_end: "10.0.0.14"
dns_nameservers: "custom"
custom_dns: ["1.1.1.1", "8.8.8.8"]
client_isolation: true
vlan_102:
name: "Apartment_2"
id: 102
appliance_ip: "10.0.0.17"
subnet: "10.0.0.16/28"
netmask: "255.255.255.240"
dhcp_handling: "Run a DHCP server"
dhcp_lease_time: "1 day"
dhcp_start: "10.0.0.18"
dhcp_end: "10.0.0.30"
dns_nameservers: "custom"
custom_dns: ["1.1.1.1", "8.8.8.8"]
client_isolation: true
vlan_103:
name: "Apartment_3"
id: 103
appliance_ip: "10.0.0.33"
subnet: "10.0.0.32/28"
netmask: "255.255.255.240"
dhcp_handling: "Run a DHCP server"
dhcp_lease_time: "1 day"
dhcp_start: "10.0.0.34"
dhcp_end: "10.0.0.46"
dns_nameservers: "custom"
custom_dns: ["1.1.1.1", "8.8.8.8"]
client_isolation: true
vlan_104:
name: "Apartment_4"
id: 104
appliance_ip: "10.0.0.49"
subnet: "10.0.0.48/28"
netmask: "255.255.255.240"
dhcp_handling: "Run a DHCP server"
dhcp_lease_time: "1 day"
dhcp_start: "10.0.0.50"
dhcp_end: "10.0.0.62"
dns_nameservers: "custom"
custom_dns: ["1.1.1.1", "8.8.8.8"]
client_isolation: true
vlan_105:
name: "Apartment_5"
id: 105
appliance_ip: "10.0.0.65"
subnet: "10.0.0.64/28"
netmask: "255.255.255.240"
dhcp_handling: "Run a DHCP server"
dhcp_lease_time: "1 day"
dhcp_start: "10.0.0.66"
dhcp_end: "10.0.0.78"
dns_nameservers: "custom"
custom_dns: ["1.1.1.1", "8.8.8.8"]
client_isolation: true
vlan_106:
name: "Apartment_6"
id: 106
appliance_ip: "10.0.0.81"
subnet: "10.0.0.80/28"
netmask: "255.255.255.240"
dhcp_handling: "Run a DHCP server"
dhcp_lease_time: "1 day"
dhcp_start: "10.0.0.82"
dhcp_end: "10.0.0.94"
dns_nameservers: "custom"
custom_dns: ["1.1.1.1", "8.8.8.8"]
client_isolation: true
适用于物业运营商的技术网络设计
Identity Pre-Shared Keys 允许多租户物业托管单个 SSID，同时将每个公寓的设备隔离到其专属的私有 VLAN 中。该设计器可帮助工程师规划父 IP 空间大小、定义 DHCP 作用域并分配干净的子网。
网络设计变量
- 针对智能家居和游戏设备，为每个公寓单元提供 VLAN 隔离。
- 合理规划 DHCP 作用域租期，防止地址耗尽。
- 为主流企业级无线控制器直接生成配置模板。
The WiFi bubble architecture for multi-tenant housing
Modern residential developments - including Build to Rent (BTR), Purpose-Built Student Accommodation (PBSA), senior living, and social housing - require seamless property-wide connectivity without compromising resident privacy. Broadcasting individual SSIDs per apartment causes severe 2.4 GHz and 5 GHz channel congestion, while a single shared WPA2 password exposes devices to neighbors on the same Layer 2 broadcast domain.
The WiFi Bubble architecture solves this dilemma. A single property-wide SSID is broadcast across all enterprise access points. When a tenant authenticates using their unique Identity Pre-Shared Key (iPSK) or Private Pre-Shared Key (PPSK), the wireless controller consults a cloud RADIUS server and assigns the client to their dedicated private VLAN. Smart TVs, gaming consoles, Apple AirPlay streamers, and laptops communicate securely within the apartment bubble while remaining isolated from other residents.
Explore our comprehensive framework on resident onboarding, operational economics, and IoT device management in the Multi-Tenant WiFi Guide. For enterprise authentication mechanics, review the Enterprise WiFi Security Guide.
Subnet sizing and CIDR prefix allocation benchmarks
Selecting the correct subnet mask per apartment balances host capacity against IP address consumption. Use these sizing benchmarks to plan your parent network allocation across multi-dwelling buildings:
| Unit count | Max devices/unit | Per-unit CIDR mask | Usable hosts/unit | Parent network CIDR | Total parent IPs |
|---|---|---|---|---|---|
| 25 Units (Boutique BTR) | Up to 5 devices | /29 (255.255.255.248) | 6 hosts | /24 (256 IPs) | 256 addresses |
| 50 Units (Student Block) | Up to 13 devices | /28 (255.255.255.240) | 14 hosts | /22 (1,024 IPs) | 1,024 addresses |
| 100 Units (Standard MDU) | Up to 13 devices | /28 (255.255.255.240) | 14 hosts | /21 (2,048 IPs) | 2,048 addresses |
| 250 Units (Large Residential) | Up to 29 devices | /27 (255.255.255.224) | 30 hosts | /19 (8,192 IPs) | 8,192 addresses |
| 500 Units (Urban Campus) | Up to 29 devices | /27 (255.255.255.224) | 30 hosts | /18 (16,384 IPs) | 16,384 addresses |
Multi-tenant wireless authentication comparison
Evaluating wireless authentication methods for multi-dwelling residential buildings requires balancing IoT device compatibility against administrative complexity and security:
| Authentication architecture | IoT & Smart TV support | Layer 2 isolation | Client onboarding experience | Controller support |
|---|---|---|---|---|
| iPSK / PPSK (Recommended) | Native WPA2/WPA3-Personal passkey. 100% compatible with headless smart devices. | Automated dynamic VLAN steering per key. Complete inter-tenant isolation. | Frictionless. Resident enters key once; smart devices discover local bubble. | Cisco Meraki, HPE Aruba, Ruckus, Juniper Mist, Extreme. |
| 802.1X Enterprise (EAP-TLS/PEAP) | Poor. Most smart plugs, game consoles, and streaming sticks lack 802.1X supplicants. | Dynamic VLAN assignment via RADIUS Tunnel attributes. | Requires certificate installation or username/password entry. High support tickets. | Universal across enterprise hardware. |
| Captive Portal Web Login | Incompatible with headless IoT without MAC authentication bypass. | Client isolation or shared guest subnet. No local device communication. | Browser pop-up required on connect. Ideal for visitors, poor for permanent residents. | Supported via Purple Cloud integrations. |
| Shared WPA2/WPA3 Pre-Shared Key | Native compatibility. | Zero isolation. All residents share the same broadcast domain (Chromecast hijacking risk). | Simple entry, but impossible to revoke a single departing tenant without re-keying all. | Consumer and enterprise APs. |
Enterprise controller implementation blueprints
Deploying multi-tenant identity keys requires configuring dynamic VLAN tags and RADIUS authorization on your wireless infrastructure:
Enable iPSK with RADIUS authentication on the MR access point SSID. The RADIUS server returns Tunnel-Private-Group-ID to dynamically place the device into the tenant VLAN routed by the MX Security Appliance.
Configure Cloud Authentication and Dynamic PSK on Aruba Central. User roles map each unique passphrase to local VLAN subnets and apply role-based access control policies at the AP edge.
Generate per-user DPSKs bound to tenant VLAN tags. Ruckus Virtual SmartZone handles encryption key matching locally and steers traffic directly into the corresponding Virtual Ethernet (VE) interface.
Mist AI provisions dynamic PSKs via API. Each resident key enforces client isolation, dynamic VLAN assignment, and per-resident bandwidth rate limiting without complex on-premise controllers.
DHCP scope and lease time engineering best practices
DHCP misconfiguration is the leading cause of connectivity failures in dense multi-tenant residential networks. Follow these engineering guidelines when deploying per-unit subnets:
Because resident devices remain on site for months, 24-hour DHCP lease times (86,400 seconds) minimize DHCP broadcast traffic and reduce CPU load on core gateway switches. For visitor or public common area SSIDs, use 2 to 4 hour leases to recycle transient MAC addresses.
Ensure switches are configured with DHCP snooping on access ports to prevent rogue DHCP servers (such as a resident accidentally connecting a consumer router backwards into an Ethernet wall jack).
iOS and Android rotate private MAC addresses by default. Allocating at least a /28 subnet (14 usable IPs) per apartment prevents pool exhaustion when residents own multiple devices that generate rotated MAC addresses.
关于多租户 iPSK 子网设计的所有须知
什么是 Identity Pre-Shared Key (iPSK) 以及它在多租户住宅中如何工作？
Identity Pre-Shared Key (iPSK) 又称 Private Pre-Shared Key (PPSK)，允许多个住户使用唯一的密码连接到同一个 SSID。连接时，RADIUS 服务器动态将设备分配给该公寓专属的私有 VLAN。
iPSK 与 PPSK 有何区别？
iPSK 和 PPSK 是不同无线厂商对同一架构概念的商业命名（如 Cisco Meraki iPSK、Extreme Networks PPSK、Ruckus DPSK）。它们均通过 WPA2/WPA3-Personal 将设备隔离至专用 VLAN。
如何为每个公寓单元选择正确的子网掩码？
对于标准的一居室或两居室公寓，/28 子网（255.255.255.240）提供 14 个可用主机 IP。对于小型学生单间公寓，/29（6 个主机）通常足够；而对于大型顶层公寓，建议使用 /27（30 个主机）。
为什么在多租户住宅中需要客户端隔离和动态 VLAN 分配？
在传统的共享网络中，邻居可以发现彼此的设备或投屏流量。动态 VLAN 分配提供了完整的二层（Layer 2）隔离，确保安全与隐私。
Purple 如何实现 iPSK 的自动化配置与生命周期管理？
Purple Connect 与物业管理系统 (PMS) 深度集成，在租约生效时自动生成 iPSK 并在退租时立即撤销凭据。
Deploying multi-tenant resident WiFi?
Purple automates resident onboarding, identity key generation, and private VLAN isolation across Cisco Meraki, Aruba, Ruckus, and Juniper Mist. Book a 20-minute architecture review.
Book a 20-min demoNetforge Network Multi-Tool
Run offline network health checks, path analysis, and latency diagnostic scans directly from your desktop.
Download Multi-Tool