WAN Resilience Design
Automatic failover across multiple transport paths with validated recovery behavior under simulated failure conditions.
Network Resilience
Designing Networks That Continue to Function When Things Go Wrong
Most organizations discover resilience gaps during an outage, not before one. Network resilience isn't a product to purchase — it's a design discipline to apply.
IVI designs and validates network resilience architectures across WAN, campus, and data center environments, then operates them through Aegis to ensure resilience configurations remain correct over time.
Validated resilience design with tested failover procedures and ongoing monitoring.
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A Different Approach
Resilience as a design audit followed by validated architecture improvements
Before recommending anything, we map the actual failure modes in your current environment: where single points of failure exist, where redundancy is designed but not validated, and where recovery depends on manual processes that have never been tested.
The Challenge
Most organizations discover network resilience gaps during an outage, not before one. Critical failures reveal missing failover paths, misconfigured redundancy, and untested recovery procedures.
Circuit fails with no failover path
Redundant uplinks are misconfigured
Remote access depends on failed infrastructure
Recovery procedures exist only in memory
Core Capabilities
We design and validate resilience improvements prioritized by business impact across all network layers.
Campus HA Architecture
Sub-second failover using MLAG and EVPN with tested link and device failure scenarios.
Out-of-Band Management
Independent management access using cellular appliances and console servers for remote recovery capability.
How It Works
Six-phase approach from assessment through ongoing monitoring.
1
Resilience Assessment
Document topology, identify single points of failure, and produce risk-rated gap analysis with remediation roadmap.
2
Architecture Design & Implementation
Design and implement resilience improvements across WAN, campus, data center, and OOB management layers.
3
Validation & Monitoring
Conduct structured failover testing, develop recovery procedures, and configure Aegis resilience monitoring.
What You Get
Complete resilience architecture with validated failover and ongoing monitoring.
Resilience Assessment Report
Risk-rated gap findings by layer and site with remediation roadmap.
Implemented Architecture
Resilience improvements across WAN, campus, data center, and OOB management.
Validated Failover Testing
Documented test results for each failure scenario with measured recovery times.
Recovery Procedures
Tested runbooks and tabletop exercises for each validated failure scenario.
Operational Outcomes
- Quantified reduction in single points of failure
- Validated WAN failover with documented recovery times
- Campus switching resilience under simulated failures
- Out-of-band management access when primary network fails
- Documented, trained, and tested recovery procedures
- Ongoing resilience monitoring through Aegis
Ideal Fit
- Organizations with network outages causing significant business impact
- BCP/DR reviews identifying network as unaddressed dependency
- Redundancy configurations never tested under realistic failure conditions
- Compliance or cyber insurance requirements for documented recovery capabilities
- Remote sites requiring on-site response due to lack of OOB management
Industry Applications
Resilience design tailored to industry-specific operational requirements
Recommendation: keep to one or two short sentences.
Manufacturing
Network downtime translates directly to production disruption. WAN resilience maintains cloud ERP connectivity, campus HA protects plant floor networks.
Best Fit
Organizations with production-critical network dependencies.
Healthcare
Network outages have patient care implications. Resilience design protects EHR access, imaging systems, and clinical communications.
Best Fit
Clinical environments requiring continuous network availability.
Financial Services
Regulatory requirements for network resilience with documented recovery capabilities and tested failure scenarios.
Best Fit
Organizations with explicit business continuity requirements.
Multi-Site Distribution
Site connectivity failures result in operational disruption. SD-WAN dual-transport failover with Aegis monitoring.
Best Fit
Organizations where site outages impact operations.
Why IVI
We validate resilience — we don't just design it
Tested Failover Validation
We conduct actual failover testing as standard practice and document observed recovery behavior.
Real vs Theoretical
The difference between 'we designed failover' and 'we tested failover and documented recovery time' is the difference between theoretical and real BCP capability.
Structured Testing
Simulated link failures, switch failures, and circuit outages with measured recovery times and application impact assessment.
Ongoing Resilience Monitoring
Aegis monitors resilience-critical configurations to detect degraded redundancy before it becomes an outage.
Proactive Detection
Alert on conditions indicating degraded resilience — secondary WAN path down, MLAG peer link errors — before primary path fails.
Configuration Drift Prevention
Continuous monitoring ensures resilience configurations remain correct over time and don't drift from validated state.
Related Resources
Related Resources
Review related solution pages, supporting materials, and additional resources that help explain where this solution fits and how it can be applied.
FAQs
Frequently Asked Questions
Common questions about network resilience and business continuity services.
We have SD-WAN deployed at all sites. Isn't WAN failover already handled?
SD-WAN provides the mechanism for failover, but it must be correctly configured and validated. Many deployments have secondary transports that are provisioned but not tested — failover policies haven't been validated, secondary paths lack adequate bandwidth, or application policies don't route correctly on backup transports.
How do we access network devices at remote sites when the network is down?
This is the out-of-band management problem. We deploy cellular management appliances — 4G/5G devices providing console access over cellular networks regardless of primary WAN state. For data centers, we use console servers with OOB management interfaces independent of the infrastructure they manage.
We have BCP requirements to document network recovery time objectives. How does IVI help?
Our assessment produces failure scenario analysis mapping network components to business applications with recovery time estimates. After implementing improvements and testing, we document observed recovery times for each validated scenario, giving your BCP program measured RTOs rather than estimates.
We don't have a formal BCP program. Is network resilience still relevant?
Yes. Network resilience design is valuable independent of formal BCP programs. Business impact from network outages is real whether documented or not. Organizations without formal BCP often have the most significant resilience gaps because improvements get deferred indefinitely without a framework driving the conversation.
What's the difference between redundancy and resilience?
Redundancy is having backup components. Resilience is having validated, tested failover that actually works under realistic failure conditions. Many networks have redundant hardware with misconfigured failover policies, untested recovery procedures, or single points of failure in the management plane.
How long does failover testing take and will it impact production?
Testing is conducted during planned maintenance windows with careful coordination. We simulate failures in controlled ways — disconnecting specific links or powering down redundant devices — to validate failover behavior. Well-designed resilience should provide seamless failover with minimal or no production impact.