Global WAN services are network services that connect an organization’s sites in several countries, including offices, factories, data centers and cloud regions, into one wide area network. A provider or group of providers sources the local connections in each country, links them over long-distance paths, and usually manages the result with common policies, monitoring and support. The goal is a network that performs, is supported and is billed consistently, regardless of where a site is.
At a glance
- A global WAN combines local access in each country with long-distance transport between regions.
- Common building blocks are MPLS, private backbones, dedicated internet access, broadband, cellular, and SD-WAN as an overlay.
- Services range from a single carrier’s network to managed multi-carrier models sourced by aggregators.
- Distance, local regulation and in-country lead times shape design as much as technology does.
- One contract, one support desk and one view of performance are often the main reasons to buy it as a service.
What problem it solves
When a company grows across borders, its network usually grows site by site. Each country office ends up with its own local provider, contract, currency, support process and equipment. Nobody can see how the whole network performs, problems bounce between providers, and opening a new country means starting from scratch.
Global WAN services bring that under one design. Traffic between regions rides predictable paths instead of whatever route the internet takes, which matters for voice, video and applications hosted far from users. A single provider or managed service takes responsibility for sourcing, installing and supporting connections in each country, and gives the organization one place to go when something breaks.
How it works
Local access. Each site needs a connection to the provider’s network or to the internet, usually from an in-country carrier. Options and quality vary widely by country, from fiber dedicated internet access in major cities to broadband, fixed wireless, cellular or satellite elsewhere.
Long-distance transport. Traffic between regions crosses a provider’s backbone, a private MPLS network or the public internet. Private backbones and MPLS offer more predictable latency and support classes of service. The internet is cheaper and available everywhere, but its performance between continents varies.
Overlay and policy. Most modern global WANs run SD-WAN at each site to choose between available paths per application, encrypt traffic and apply consistent policy. Some providers run SD-WAN gateways on their backbone so internet-connected sites can join the private network close to where they are. Security services, often delivered as secure access service edge (SASE), may be built into the same service.
Operations. The service typically includes round-the-clock monitoring, a single support desk, coordination with local carriers for repairs, and reporting across all sites. How much of that is included, and how fast faults are fixed in each country, differs by provider and is set in the contract.
For more on designing and sourcing a global network, see our Global WAN Services solution page.
When it matters for buyers
- Expanding into new countries. Lead times and options differ by country, so plan connectivity early and have a fallback for opening day.
- Consolidating after acquisitions. Merging several regional networks is a chance to move to one design and one set of contracts.
- Users far from the applications they use. Distance adds latency that only path design can reduce.
- Too many providers to manage. A managed or aggregated model can reduce the number of contracts and support desks.
- Renewing an older MPLS network. Many sites can move to SD-WAN over local internet, while critical paths stay private.
Questions to ask vendors
- In which countries do you own your network, and where do you rely on partners for local access?
- What are realistic installation lead times in each of our countries?
- Who coordinates repairs with local carriers, and what repair times apply in each country?
- What latency between our main regions can you commit to in the SLA?
- How do you handle countries with special regulatory rules, such as restrictions on cross-border links or encryption?
- Can we see performance and incidents for every site in one portal?
- Is billing in one currency on one invoice, and how are local taxes handled?
- How do we add or remove sites during the contract term?
How it differs from SD-WAN
SD-WAN is a technology: software at each site that steers traffic across available connections and applies policy. A global WAN service is the whole international network, including the local access circuits in each country, the long-distance paths between them, and the management and support around them. SD-WAN is often one component of a global WAN service, but buying SD-WAN alone does not source the connections in each country.
Problems this helps with
- Every country office has a different provider, contract and support process
- Applications are slow for staff on the other side of the world
- Opening a site abroad takes months to get connected
- No single view of how the network performs across regions
