Design your network segmentation - assign VLAN IDs, names, and subnets with live validation and CSV export.
| ID | Name | Subnet / CIDR | Hosts | Network | Gateway | Last Usable | Broadcast | Description | |
|---|---|---|---|---|---|---|---|---|---|
| 254 | 192.168.10.0 | 192.168.10.1 | 192.168.10.254 | 192.168.10.255 | |||||
| 254 | 192.168.20.0 | 192.168.20.1 | 192.168.20.254 | 192.168.20.255 | |||||
| 510 | 192.168.30.0 | 192.168.30.1 | 192.168.31.254 | 192.168.31.255 | |||||
| 254 | 10.0.40.0 | 10.0.40.1 | 10.0.40.254 | 10.0.40.255 | |||||
| 254 | 172.16.0.0 | 172.16.0.1 | 172.16.0.254 | 172.16.0.255 | |||||
! Generated by VLANlab VLAN Planner ! Paste into IOS/IOS-XE global configuration mode ! ! VLAN definitions vlan 10 name Management vlan 20 name Servers vlan 30 name Workstations vlan 40 name IoT vlan 99 name Guest ! ! SVI Layer 3 interfaces ! (gateway = first usable host in each subnet) ! interface Vlan10 description Network devices and OOB access ip address 192.168.10.1 255.255.255.0 no shutdown ! interface Vlan20 description Production servers ip address 192.168.20.1 255.255.255.0 no shutdown ! interface Vlan30 description Employee desktops and laptops ip address 192.168.30.1 255.255.254.0 no shutdown ! interface Vlan40 description Smart devices and cameras ip address 10.0.40.1 255.255.255.0 no shutdown ! interface Vlan99 description Guest WiFi (isolated) ip address 172.16.0.1 255.255.255.0 no shutdown
Use this planner to document your network segmentation. Each VLAN gets an IEEE 802.1Q ID (1-4094), a name, and a subnet in CIDR notation. Duplicate IDs and overlapping subnets are flagged in real time. Export your plan as CSV for handoff or documentation.
Common patterns: VLAN 10 Management, 20 Servers, 30 Workstations, 40 IoT/Cameras, 50 VoIP, 99 Guest WiFi. Keeping VLAN IDs meaningful (10s or 100s steps) makes configuration readable on switches. Use VLSM Calculator to allocate subnets from a base address block first, then document them here.