Challenge

Three sites, three islands of IT.

The organization operated from three separate facilities in the same city. Each building had evolved independently — isolated IT environments with their own management, duplicated services, fragmented security, and little resource sharing. The result was higher complexity, less cross-site visibility, and added administrative overhead.

Key challenges

  • Three independently managed IT infrastructures
  • Duplicated services and administrative effort
  • Inconsistent security policies
  • Limited inter-site bandwidth
  • Separate server and storage resources
  • No centralized monitoring and management
  • Future scalability limitations

Each site ran on separate internet connections. Even with two ISPs per location, a full outage at a site could still disrupt local operations, communications, and access to centralized services. The business needed an architecture that stayed connected even through multiple ISP failures.

Solution

A dark-fiber backbone tying the campus together.

Designed and implemented a dedicated dark fiber backbone connecting all three facilities into one unified enterprise network — high-speed, low-latency links between buildings that enabled centralized infrastructure services and consolidated IT resources.

The project included

  • Dark fiber deployment between facilities
  • Redundant network architecture design
  • VLAN segmentation
  • Centralized authentication services
  • Shared storage and virtualization platforms
  • Unified monitoring and security controls
  • Standardized network management

By integrating routing and failover across the fiber-connected sites, internet traffic could automatically reroute through another building whenever local providers went down — so losing both ISPs at one site no longer caused an outage. After implementation, all facilities operated as a single enterprise environment while keeping logical separation where needed.

Results

A unified, resilient backbone.

  • Each building retained dual-ISP connectivity
  • All three sites shared internet resources over the fiber backbone
  • Losing both ISPs at one site no longer caused an outage
  • Access stayed available via surviving providers at neighboring sites
  • Critical operations continued without manual intervention
By the numbers
Buildings connected
3
Dark fiber backbone
4-core fiber
ISP providers
6 total
Internet egress points
3
Site-to-site connectivity
Redundant
Single point of failure
Eliminated

Technical specifications

Backbone, network and resiliency.

Backbone & connectivity

  • Dedicated dark fiber between three facilities
  • 4-core fiber backbone
  • High-speed, low-latency inter-site links
  • Redundant site-to-site connectivity

Network architecture

  • VLAN segmentation
  • Layer 3 routing across sites
  • Centralized authentication services
  • Shared storage and virtualization platforms
  • Standardized network management

Internet & resiliency

  • Dual ISPs per building (6 providers total)
  • Three internet egress points
  • Cross-site internet failover
  • Automatic rerouting on local ISP loss
  • Single point of failure eliminated

Operations

  • Unified monitoring and security controls
  • Centralized infrastructure services
  • Consolidated IT resources across sites
AuthorDmytro DoianovClientConfidential / NDADateMay, 2019Share