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Network Resilience Assessment
Test assumptions about network redundancy, provider diversity and recovery paths before an outage exposes gaps in a Cisco or Meraki design.
Devices supported
across the UK
Client locations
supported
Traffic handled
at peak time
Average
response time
Average response is not a resolution time or a contractual guarantee. Support scope and response commitments are agreed for each engagement.
A network resilience assessment checks how much confidence you can place in the recovery arrangements of your existing network. MCI reviews Cisco and Meraki designs, configurations and available test evidence to identify where the intended resilience is supported by facts and where it remains an assumption. The result helps you decide what to test, improve or document next.
This differs from designing a new resilient architecture. The assessment starts with the estate you have and the services the business expects to retain when something fails. It asks whether those expectations are reasonable and whether the relevant behaviour has actually been demonstrated.
A clear requirement
Turn the business need into a practical network scope with visible dependencies.
A controlled delivery
Plan implementation, testing and rollback before production changes begin.
A supportable result
Leave useful records, ownership and escalation routes behind.
Identify the services and failure scenarios that matter
We establish which business activities need to continue and the conditions under which the network is expected to support them. Device failure, circuit loss, maintenance and loss of a site can create different requirements.
The scope should distinguish the network’s responsibility from application and provider dependencies. A redundant network path cannot by itself restore an application whose own recovery arrangement is incomplete.
Existing service commitments and previous incidents are useful evidence. They help identify where the organisation’s expectations differ from the design or where a past failure exposed a dependency that has not yet been addressed.
Standards & partnerships
Confidence in the team behind your network.
Cisco Partner
Cisco Meraki
Cyber Essentials
Cyber Essentials PlusMCI Network Services is operated by Proxar Ltd. Certifications apply to the certified legal entity and the scope of its certificates. View accreditation information
Review the real independence of redundant components
We examine the physical and logical relationships behind the apparent redundancy. Shared power, common cable routes, a single upstream service or a common management dependency can affect several components at once.
Some information must come from a provider or facilities team. Where physical diversity has not been evidenced, the report states that limitation. Two circuit references should not be treated as proof of independent paths through the building and carrier network.
The assessment also considers whether the surviving components can carry the intended service. Capacity, routing and security policy after a failure are part of resilience, not separate matters to be investigated only when the primary path is lost.
A useful starting point
Tell us what is happening.
A short description of the problem is enough for an initial discussion.
Compare configuration and documentation with intended behaviour
We review the relevant failover, routing and management settings against the documented design. Inconsistencies may reveal that the environment has changed since the last test or that a nominal backup is not configured for its expected role.
Operational records can show whether the recovery procedure is usable. The team needs to know how to recognise the failure, reach the environment and carry out any required manual action.
Where documentation is missing, documentation recovery can capture the current state. The assessment should not invent a recovery process from incomplete records and present it as an established procedure.
Different environments. The same care.
Built around the work
your network supports.
Finance, banking and the wider private sector. We start with the systems and people that depend on your connections.
Finance & banking
Market-data paths, routing and provider coordination on clients’ behalf.
Financial-market services ↗Offices & multi-site teams
Reliable access between people, workplaces and business applications.
Office network design ↗Data centres & cloud
Network boundaries, workload connections and operational ownership.
Data centre networks ↗Use testing where it is appropriate and authorised
A controlled test can provide stronger evidence than a configuration review alone, but its impact must be understood. We define the scenario, expected result, observation points and stop conditions before any disruptive action.
Application owners may need to participate in confirming recovery. A routing change can occur as intended while a business service remains unavailable or performs below the accepted level. The test should observe the service that matters, not only the network protocol.
Where a test cannot be performed, the remaining uncertainty is recorded. A desktop assessment, a configuration check and a successful live failover test are different forms of evidence and should be labelled accordingly.
Prioritise improvements and retesting
Findings identify confirmed weaknesses, unverified assumptions and useful operational improvements. Recommendations explain their significance and the work needed to address them.
Some issues may be resolved through documentation, access or configuration changes. Others may require circuit diversity, additional capacity or a different architecture. Resilience design develops the solution where the assessment identifies a structural weakness.
After changes, the relevant tests and records need updating. Resilience is not a permanent attribute established by one exercise; later changes to applications, circuits or configurations can alter the behaviour that was previously demonstrated.
Resilience assessment questions
Can you assess resilience without causing an outage?
A document and configuration review can provide useful findings without deliberately failing components. It cannot prove every live recovery behaviour. We distinguish what has been assessed from what has been tested and propose further validation where it would materially improve confidence.
Does a successful failover test guarantee future recovery?
No. It demonstrates behaviour under the tested conditions and configuration. The result remains valuable, but its scope and date matter. Changes to the estate or dependencies may require the relevant scenario to be reviewed and tested again.
Can the assessment include provider circuits?
Yes, at the agreed boundary and with available evidence. Physical diversity and provider-side behaviour may require confirmation or participation from the carrier. We do not claim visibility into infrastructure that has not been examined.
What should we prepare?
The intended recovery expectations, network diagrams and records of previous tests or incidents are useful. Arrange a network resilience assessment to establish where evidence is strong and where the business is relying on assumptions.
Talk to a specialist
Need a specialist view?
Tell us what is affected, what changed and what your team has already checked. A short outline is enough to start.
+44 203 196 6566Choose option 1
sales@proxar.co.ukUK-wide service.
Most of our engineers are based in Kent, with a focus on London, Sussex, Essex and Berkshire.
Existing customers should use their agreed support and escalation channels. This form is for service enquiries, not a monitored emergency ticket.
Tell us what you need.
A short outline is enough. Please do not include passwords or sensitive network details.
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