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Switch Port Density Calculator

Calculate switch port requirements and recommended network topology

Endpoint Counts

Wired desktop computers and workstations requiring one port each.
devices
VoIP phones typically daisy-chain with PCs, sharing a port. If separate, each needs its own port.
devices
Each AP requires one uplink port, typically PoE/PoE+ powered.
APs
Network printers, scanners, MFPs, and other shared devices.
devices
IP cameras, sensors, badge readers, building automation, digital signage, etc.
devices

Planning Parameters

Percentage of additional capacity for future growth. Industry standard is 20-30% for 3-5 year planning.
%
N = no redundancy. N+1 = one spare switch per group. 2N = full duplication of all switches.
24-port switches are common for small IDFs. 48-port switches provide better density and cost per port.
Number of ports reserved for uplinks to distribution/core layer. Typically 2-4 per switch.
ports

Port Requirements

Base Device Ports
Growth Allowanceports
Total Access Ports Neededports

Switch Requirements

Usable Ports per Switch
Base Switches Required
Redundancy Switches
Total Switches
Total Uplink Ports

Topology Recommendation

References: Cisco Campus Network Design Guide, IEEE 802.3af/at/bt (PoE standards). Growth factor industry standard: 20-30% for 3-5 year planning. Topology tiers based on Cisco hierarchical model.