Network Redundancy Cost Calculator

Additional cost for N+1 and ring redundancy.

Base network cost ($K)

Number of nodes

Protection Scheme

Fiber cost share (%)

Lost revenue/hr downtime ($K)

Current availability (%)

Tab to move between fields

Redundancy premium ($)

$310,000.00

≈ 7 Teslas

Cost premium (%)62

Total redundant network ($)$810,000.00

Target availability (%)99.95

Current downtime (hrs/yr)43.83

New downtime (hrs/yr)4.38

Downtime reduction (hrs/yr)39.45

Annual revenue saved ($)$394,470.00

Payback period (years)0.8

Scheme NameRing

How to Use This Calculator

Enter the primary link capacity in Mbps and the monthly cost.
Set the redundant link type (diverse fiber, wireless backup, SD-WAN failover) and its monthly cost.
Input the average revenue per hour of downtime for your business.
Review the Annual Redundancy Cost and the Annual Downtime Cost Avoided.
Compare the ROI of each redundancy option to select the most cost-effective approach.

How the result changes with Base network cost ($K)

Base network cost ($K): Non-redundant network build cost in thousands of dollars.
Number of nodes: Number of network nodes/sites in the topology.
Protection Scheme: Select network protection scheme
Fiber cost share (%): Percentage of base cost attributable to fiber/cable (vs. equipment).
Lost revenue/hr downtime ($K): Revenue lost per hour of network downtime in thousands.
Current availability (%): Current network availability without redundancy.

Redundancy premium ($): Additional cost above the base network for the chosen protection scheme.
Cost premium (%): Redundancy cost as a percentage of the base network cost.
Total redundant network ($): Total cost of the fully protected network.
Target availability (%): Estimated availability with the chosen protection scheme.
Current downtime (hrs/yr): Annual downtime hours at the current availability level.
New downtime (hrs/yr): Expected annual downtime with redundancy.
Downtime reduction (hrs/yr): Hours of avoided downtime per year.
Annual revenue saved ($): Revenue protected by avoiding downtime.
Payback period (years): Years to recoup redundancy investment from avoided downtime losses.

Identify Input Parameters
4 parameters
Base network cost ($K) = 500, Number of nodes = 8, Protection Scheme = 2, Fiber cost share (%) = 40 = 6 input(s) provided
Calculate Redundancy premium
Redundancy premium = totalRedundantCost - baseNetworkCost
310000 = $310,000
Calculate Cost premium
Cost premium = (additionalCost / baseNetworkCost) * 100
62 = 62
Calculate Total redundant network
Total redundant network = redundantEquipCost + redundantFiberCost
810000 = $810,000