Routing Calculators
30 free routing calculators in Networking.
- Administrative DistanceCompare administrative distances across routing protocols to determine the preferred route.
- BGP Best Path CalculatorCompare two BGP paths through the real tie-break order and see which attribute decides the winner.
- BGP Community CalculatorConvert between AS:value and 32-bit BGP community notation, in hex, and identify well-known community values.
- BGP Prefix CalculatorCalculate the number of BGP prefixes and routing table impact for an address block.
- BGP Route Reflector PlannerCompare iBGP full-mesh session counts against a route-reflector design and size the sessions each RR carries.
- ECMP DistributionCalculate how traffic is load-balanced across equal-cost multi-path routes.
- EIGRP MetricCalculate the composite EIGRP metric from bandwidth, delay, reliability and load.
- Failover Time CalculatorWork out failover time from BFD or hello timers plus switchover, and turn it into packet loss and yearly downtime.
- LDP Session CalculatorSize LDP sessions, label bindings and hello load across an MPLS core using liberal label retention.
- Longest Prefix MatchDetermine which routing table entry wins for a destination using longest prefix match.
- MPLS LSP CalculatorCount the LSPs a PE mesh needs, the label space they consume and the RSVP-TE refresh load they generate.
- MPLS MTU CalculatorSize core MTU for an MPLS label stack at 4 bytes per label, including VPN and entropy labels.
- Next Hop CalculatorDetermine the next-hop gateway for a destination based on the routing table entries.
- OSPF Area PlannerSplit an OSPF domain into areas and size each LSDB, showing what stub and totally-stubby areas filter out.
- OSPF CostCalculate OSPF interface cost from link bandwidth using the reference bandwidth formula.
- OSPF Neighbor CalculatorCount OSPF adjacencies on any network type and see how much DR/BDR election cuts against a full mesh.
- Policy-Based Routing CalculatorEstimate matched traffic, ACE evaluations and CPU cost when PBR runs in hardware versus in software.
- Recursive Route CalculatorTrace recursive next-hop resolution depth, its control-plane cost and the platform recursion limit.
- RIP MetricCalculate the RIP hop-count metric for a route and check it against the maximum hop limit.
- Route Flap CalculatorApply BGP flap damping: accumulate penalty per flap, compare to the suppress limit and get the suppression time.
- Route Lookup CalculatorRun longest prefix match over four candidate routes and see exactly which one forwards a given destination.
- Route SummarizationSummarize multiple contiguous routes into the smallest covering supernet.
- Routing Convergence CalculatorAdd up detection, flooding, SPF and FIB installation to get end-to-end routing convergence and the worst term.
- Routing Health Score CalculatorScore routing health from convergence, table utilisation, flap rate, session state and path redundancy.
- Routing Table SizeEstimate memory and entry requirements for a routing table given prefix counts.
- Segment Routing SID CalculatorDerive prefix-SID labels from an SRGB base and index, and check SRGB utilisation across the domain.
- SR-MPLS CalculatorCheck an SR-MPLS label stack against platform MSD and MTU, and compare state held versus RSVP-TE.
- Static Route CalculatorBuild a static route from a destination and prefix, and see whether its administrative distance beats the dynamic protocol.
- VRF Capacity CalculatorSize VRFs against platform route and VRF limits, with RIB memory and the resource that caps you first.
- VRF Route Leaking CalculatorMeasure how much route leaking between VRFs amplifies the routing table under hub, mesh or selective policy.