When a network problem strikes at 2 a.m. or a technician leaves the organization, one question comes up quickly: what is supposed to be on this network, and how is it laid out? If the answer lives only in someone's memory, troubleshooting slows down and mistakes multiply. A simple record of your IP addressing and VLANs is one of the most useful pieces of documentation you can keep, and it does not need special software.
Faster troubleshooting. Knowing the expected address ranges tells you at once whether a device is where it should be.
Fewer conflicts. Two devices claiming the same address cause confusing, intermittent problems.
Safer changes. Planning a new camera system or phone installation is easier when you know which addresses are free.
Security. An accurate inventory makes it easier to notice something that does not belong.
Smoother handovers. New staff and outside vendors can get up to speed quickly.
Site name, address and main contact
Internet provider, circuit type and account details, stored securely
Public IP addresses, if static
Record a table-style list in a document or spreadsheet with:
Name and purpose, such as staff computers, clinical devices, guest wireless, phones or cameras
VLAN number and name
Network range and subnet mask, for example a block of addresses assigned to that segment
Gateway address, the router or firewall interface for that segment
DHCP range, the pool of addresses handed out automatically
Static range, the addresses reserved for printers, servers and other fixed devices
DNS and time servers the segment uses
Notes, such as which switch ports or wireless networks use it
List devices with static addresses: servers, printers, firewalls, switches, access points, cameras, door controllers and phone systems. Include the device name, address, location, make and model, and who is responsible for it.
A VLAN separates traffic on the same physical equipment. A well-kept VLAN list explains which groups of devices can talk to each other and which cannot. For each VLAN, note:
The number and name
What devices belong to it
Which rules allow traffic to or from other VLANs
Which switch ports and wireless networks carry it
In a senior living community, for example, you might separate resident internet access, staff systems, medical devices, building systems and security cameras. Writing down why each separation exists helps future administrators keep it that way.
Use a consistent plan across sites. If every site uses the same numbering pattern, such as the third part of the address matching the VLAN, troubleshooting becomes much easier.
Leave room to grow. Do not use every address in a range on day one.
Avoid overlapping ranges between sites if you may later connect them.
Keep it version controlled. Note the date and author of each change.
Store it safely. A network diagram and address list are valuable to attackers. Keep them in an access-controlled location, but make sure at least two trusted people and your IT provider can reach them during an outage, including a printed or offline copy.
Do not store passwords in the same document. Use a password manager or vault.
Documentation is only useful if it matches reality. Update it whenever you add or change equipment, and review it at least twice a year. A quick check against the router's list of connected devices can reveal unrecorded equipment.
A one-page drawing that shows the internet connection, firewall, switches, wireless and major segments pairs well with the address list. It does not have to be fancy; boxes and labeled lines are enough, as long as the labels match the names in your spreadsheet.
UnityCare IT documents networks for healthcare and senior-living clients as part of onboarding, and can audit and update an existing record so your team has an accurate map when it matters.
Wi-Fi, switching, firewalls and internet that hold up across a whole facility.
Call or text: 405-285-3845
New customers: start@unitycareit.com
Existing customers: support@unitycareit.com
Address: UnityCare Technologies, 2524 N Broadway Ste 554, PMB 947974, Edmond, Oklahoma 73034-4172