From requirements to topology
Application traffic patterns, user distribution and security zones determine the topology. Campus, branch and data center face different problems, and applying one template to all three is the most common mistake.
- Application traffic is split into east-west and north-south
- Branch design starts from link count and redundancy
- Security zones are embedded into the topology from the start
- The growth curve feeds the capacity plan
Wireless design and site survey
Wireless coverage is verified on site, not on a floor plan. Wall materials, rack height and device density change signal behavior; the coverage map comes from measurement and is retested after deployment.
- The coverage map is produced through measurement
- Density is a more frequent bottleneck than coverage
- Channel planning accounts for neighboring premises
- Measurement is repeated after go-live
Hardware and lifecycle
Device selection follows the port density, power budget and software support the topology requires. End-of-support dates are tracked on one calendar, and refresh aligns to budget periods.
- Uplink capacity is sized for the next cycle, not for today
- Stacking and redundancy choices constrain later expansion
- Spare parts and lead times are agreed before purchase
- Devices sharing a role are procured in one batch where possible
Configuration consistency
A significant share of network faults arises not from hardware but from configurations that have drifted apart. Template-based configuration and drift detection keep devices in the same role behaving the same way.
- A configuration template is defined per device role
- Drift detection runs regularly and is reported
- Changes leave a record and can be reversed
- Configuration backups are taken on a schedule