Designing for Disruption: Lessons for Critical Infrastructure
Military-grade resilience concepts like DDIL and PACE show utilities, ports, and terminals how to keep operating when networks fail.
When most people picture military logistics, they think of cargo planes, convoys, and shipping containers. Underneath all of it is connectivity. Moving data is moving sustainment: if a unit cannot see where its equipment is or coordinate when it arrives, the supply chain stalls.
At a recent GovCon Wire panel, Future Technologies joined leadership from the Office of the Under Secretary of War for Research and Engineering (OUSD(R&E)) to talk through how military operations keep running in the gray zone, where an adversary disrupts communications and networks without firing a shot.
That conversation applies directly to civilian infrastructure. The Department of War depends on commercial ports, power grids, and water utilities at home to move and sustain forces. A facility that stops working when its wide-area network drops is a problem for commerce and for defense readiness at the same time.
Check the Connectivity Assumption
Many enterprise platforms are built on the assumption that high-speed fiber and cloud reachback will always be there, like running water. Defense operators plan for a different reality, which they call DDIL: denied, degraded, intermittent, or limited.
The cause varies. Jamming, a cyber incident, a hurricane, or a backhoe cutting a municipal fiber trunk all produce the same result at the site. So the useful question for any operations leader is this: if your facility loses its connection to the cloud, can your local team still dispatch crews, open gates, track critical cargo, and monitor pumps?
Operating in Island Mode
A resilient facility is designed to disconnect from the outside network and keep working locally.
A regional hospital is a good model. When a storm takes down the utility grid, transfer switches bring backup generators online within seconds, and the ICU and surgical suites keep running. The hospital islands itself from the grid by design, and its staff barely notice the switch.
Multi-access Edge Computing (MEC) does the same job for operational software. Instead of running applications in a cloud data center hundreds or thousands of miles away, the compute sits on site at the port, treatment plant, or logistics terminal. When a truck arrives during an outage, the local system still checks it in, verifies serial numbers, and directs the crew. When the external link comes back, the site sends a compressed, encrypted update to headquarters and central records catch up.
PACE Planning for the Network
Island Mode works only if the site also has more than one way to reach the outside world. The military's PACE discipline, primary, alternate, contingency, emergency, translates directly to a facility's communications design:
- Primary: commercial fiber
- Alternate: a private cellular network, such as private 5G or LTE
- Contingency: microwave or other point-to-point wireless links
- Emergency: low Earth orbit (LEO) satellite
Each path should fail independently of the others, and traffic should shift between them automatically instead of waiting for someone to reroute it by hand.
Treat Spectrum as a Site Asset
Spectrum choices carry their own dependencies. Many U.S. private networks run on shared CBRS spectrum (band n48), and CBRS radios need regular authorization from a cloud-hosted Spectrum Access System to keep transmitting. For many sites that is a reasonable tradeoff. For a facility that must keep its local network up through a long backhaul outage, or for deployments overseas, licensed mid-band options such as n78 and n79 deserve a close look. Radio spectrum should be planned and managed like any other physical asset at the site.
Working Across the Civil-Military Seam
Commercial resilience and defense readiness increasingly depend on the same infrastructure. Future Technologies designs connectivity for both, with networks engineered to keep a site running when its outside link goes down.
Every network loses its connection at some point. Resilience comes from planning for that day so the outage is a manageable event at the site.
Ports, utilities, and terminals built to run in Island Mode keep serving their communities, and the missions that depend on them, until the link comes back.
Critical Connectivity. Built Right.™
Frequently asked questions
DDIL stands for denied, degraded, intermittent, or limited connectivity. It is the military planning term for conditions where a site cannot count on a reliable link to the outside network, whether from jamming, a cyber incident, a storm, or physical fiber damage.
Island Mode means a facility can disconnect from its wide-area network and keep running on local compute and controls, similar to how a hospital runs on backup generators during a grid outage, until the outside link is restored.
PACE stands for primary, alternate, contingency, and emergency. Applied to connectivity, it means pairing commercial fiber as the primary path with private cellular, point-to-point wireless, and LEO satellite as independent backups that can take over automatically.
