network·Cisco topology icons + IP/CCTV (ONVIF) conventions·security, business·complexity 3/3·since v0.6.0
CCTV camera network topology
IP-video surveillance topology — Internet → perimeter firewall → core switch → PoE switches → dome/PTZ/bullet cameras, with the cameras isolated on their own 192.168.20.0/24 subnet and an NVR for recording.
For the CCTV / security integrator
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Scenario
A security integrator is documenting an IP-CCTV install for hand-off. The cameras need their own isolated subnet (so they can't route to the corporate LAN), Power-over-Ethernet from the access switches, and a single NVR recording everything. The diagram has to be editable and printable so it can be reused for the next building.
What the diagram shows
- The camera subnet
192.168.20.0/24is drawn as a dashed boundary enclosing the three cameras and both PoE switches — the cameras' IPs are validated against the CIDR, so a typo'd address is caught, not silently rendered. - Camera body styles are real silhouettes:
type: dome,type: ptz, andtype: bulleteach render differently, the way an integrator's drawings distinguish them. - PoE links (
poe) are drawn in green with a power tag — these carry both data and power to the cameras. - The uplinks are a trunk carrying VLAN 20 at 1G; the fiber backbone to the core is orange at 10G; the ISP hand-off is a serial/WAN circuit.
Annotation key
| Element | Meaning |
|---|---|
| Dashed blue box | Logical subnet (label = CIDR) |
| Green link + PoE | Power-over-Ethernet to a camera |
| Orange link | Fiber uplink |
Trunk · VLAN 20 · 1G | 802.1Q trunk carrying VLAN 20 at 1 Gbps |
Swap layout: tiered for layout: tree to get a pure hierarchy, or add more subnet / vlan boundaries as the install grows.