Record each subnet with its gateway, DNS and DHCP pool, tie each address to the equipment that holds it, and see how full the subnet is and its next free addresses.

Overview

The Subnets page lists each subnet with its network and name, VLAN, Location, Gateway, and how many addresses are Recorded (with the percentage full). Filter by Location or VLAN. IPv4 and IPv6 both work.

A subnet's page shows:

• Settings: gateway, DNS servers, DHCP pool and the usable addresses.
• Recorded: how many addresses are recorded, with a bar that turns yellow and then red as the subnet fills.
• Next free: the lowest free addresses, leaving out the gateway and the DHCP pool.
• Subnets inside, for a larger network, with the Free blocks between them.
• Named ranges, such as printers or phones, each with its own fill and next free address.
• The addresses recorded in the subnet.

Requirements

• Role: to see subnets and addresses, See VLANs, subnets and addresses (every built in role by default). To add, edit and delete them, Add, edit and delete VLANs, subnets and addresses (Admin, Manager and Technician by default).

Step 1: Add a subnet

1. Open Network, then Subnets, and click Add subnet.
2. Enter the Network in CIDR form, such as 10.0.5.0/24, and a Name, such as Office LAN.
3. Optionally choose the Location and VLAN, and enter the Gateway, DNS servers, DHCP pool from and DHCP pool to, and a Description.
4. Save. The subnet's page opens.

Step 2: Record addresses

1. On the subnet's page, click Add address. The next free address is filled in. Or click any address under Next free to record that one.
2. Choose the Kind: Static, Reserved or DHCP reservation.
3. Choose the Equipment that holds it, or describe it in Or what holds it (such as Printer in reception).
4. Add a Hostname and Note if you like, and save.

The equipment's page lists its addresses in its Network section, each linking back to the subnet.

Subnets inside a subnet

Record a large network, such as 10.0.0.0/16, and the smaller subnets inside it, and the large one's page lists them under Subnets inside with the Free blocks still unused between them.

1. On the larger subnet's page, click Add subnet inside. Or click a free block to start a subnet with that range.
2. Fill in the form as in Step 1 and save.

Each smaller subnet's page links back to the one it sits in.

Named ranges

A named range is a run of addresses inside a subnet, such as printers from .50 to .99.

1. On the subnet's page, in Named ranges, click Add range.
2. Enter a Name, the From and To addresses, and an optional Note.
3. Save.

Each range shows how many of its addresses are recorded and its next free one (click it to record it), or Full. Deleting a range removes only the name; the addresses in it stay.

Notes

Note: Deleting a subnet deletes the addresses recorded in it. The activity log keeps the history.

Note: Deleting an address makes it free in the subnet again.

Note: If you manage clients, each client has its own subnets, and Add subnet appears only while you work in one client.

Troubleshooting

"10.0.5.0/24 is already recorded at this location, as Office LAN." The same network is already recorded at that location. Open the existing subnet, or choose a different location.

"The gateway has to be inside 10.0.5.0/24." The gateway, DHCP pool and addresses must all fall within the subnet's network.

"The pool has to end after it starts."DHCP pool to must be a higher address than DHCP pool from.

"No free address outside the DHCP pool." Every address outside the pool and the gateway is recorded. Shrink the pool, or use a larger subnet.

"That address is already recorded." Each address is recorded once per subnet. Edit the existing entry.