Connect. Secure. Manage.
Network Resilience Design
Identify single points of failure and plan Cisco or Meraki redundancy around realistic outage scenarios, application behaviour and recovery priorities.
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.
Network resilience design plans what the service should do when a device or link fails. We agree which services must keep working, the disruption you can accept and how recovery will happen. Cisco and Meraki choices follow those needs. The design is tested against faults, rather than judged only by how many spare devices it contains.
A second circuit or spare firewall can be useful, but its value depends on the wider design. Shared power, common physical routes, insufficient surviving capacity or an inaccessible management path can undermine an apparently redundant arrangement.
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.
Define what needs to remain available
We start with business activities rather than an unrestricted promise of uptime. Which apps are essential? Can some services operate with reduced performance? Is a short interruption acceptable while an alternative path becomes active? Who makes those decisions?
The answers help establish appropriate failure scenarios and recovery aims. An ordinary office, a multi-site organisation and a network carrying financial-market services may have different priorities. The design should reflect those differences without assuming that the most complex approach is always justified.
Existing contractual commitments also need to be understood. A network design cannot change a carrier’s repair obligation or an app’s recovery behaviour. Those dependencies remain part of the overall service picture.
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
Examine shared dependencies behind separate paths
We review the physical and logical relationships between devices, circuits and locations. Two connections may still rely on a common building entry, carrier infrastructure, power source or upstream service. The design records where diversity is evidenced and where confirmation is required from another party.
Logical dependencies matter as well. Authentication, name resolution, routing control and management services can affect the ability to use an otherwise healthy path. We find these dependencies so resilience is considered across the service rather than one device at a time.
Where the current setup needs verification, a resilience assessment can establish the evidence. Design work then addresses the findings and the desired future behaviour.
A useful starting point
Not sure where to start?
Bring the requirement. We will help you define the engineering work.
Design the surviving service, not just failover
The remaining path must be capable of carrying the activities the organisation expects to continue. We consider bandwidth, device resources and the security policies applied after a failure. An alternative route that bypasses an intended control may restore network access while creating a different problem.
Routing and failover choices are assessed for the actual platforms and topology. We also consider the return to normal operation. Automatic restoration may be appropriate in one situation and undesirable in another if it causes repeated movement during an unstable fault.
For important apps, testing needs to observe more than whether a route changed. The app owner may need to confirm session recovery, data continuity or the behaviour of a connected service.
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 ↗Plan for maintenance and human decisions
Resilience design should make routine work safer. We consider whether devices can be isolated, upgraded or replaced without creating an unmanaged service risk. The design sets out the checks required before taking a component out of service and the evidence needed before returning it.
Recovery also involves people. Engineers need an appropriate route to reach the setup, current records of the settings and clear authority for significant changes. An out-of-band management arrangement can be part of the design, but its suitability depends on the surrounding access and security controls.
Cutover and rollback planning develops the execution detail for specific changes. Resilience design establishes the architecture and recovery principles that make those plans credible.
Turn resilience requirements into acceptance tests
The design should lead to a defined test programme. We identify representative failures, expected outcomes, observation points and conditions that would require the test to stop. Disruptive testing takes place only with the necessary authorisation and preparation.
Results are recorded against the design assumptions. Where a failure scenario cannot be tested, the remaining uncertainty is clear. A review of setup is useful evidence. But it should not be reported as a successful live failover exercise.
The final documentation explains the intended behaviour and any limitations the organisation has accepted. This gives support teams a useful reference when an incident occurs, rather than leaving them to interpret the architecture under pressure.
Resilience design questions
Does every site need two of everything?
No. The appropriate design depends on the impact of a failure, the recovery options and the cost of extra components. Duplication without understanding dependencies can add expense and complexity without delivering the continuity the business expects.
Can you improve resilience without replacing the whole network?
Often. Configuration, circuit diversity, management access or a targeted hardware change may address the main weakness. We assess the current design and identify which changes materially improve the agreed failure scenarios.
Will you guarantee uninterrupted service?
No design can remove every possible cause of disruption. The engagement defines specific resilience aims, dependencies and tests. Any contractual service commitments are agreed separately and should reflect the systems and duties actually within scope.
Where do we start?
Identify the activities that cannot tolerate the current recovery arrangement and any known single points of failure. Discuss network resilience design to turn those concerns into an architecture and a testable recovery plan.
Talk to a specialist
What does your network need next?
Tell us what you are planning, changing or trying to improve. We will help define a practical next step and the engineering scope.
+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.
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