What connectivity does a small business need for cloud migration?
A small business migrating to the cloud needs a stable, sufficiently fast internet connection with low latency, reliable upload capacity and resilience appropriate to its dependence on cloud applications. It should also use properly configured firewalls and secure remote-access controls, with a backup connection considered where losing connectivity would prevent staff from working.
For cloud migration, a small business needs connectivity that can support both the transfer of data into cloud services and the organisation’s normal day-to-day traffic. This means assessing the internet service, internal network, routing, security controls and connection dependencies together rather than choosing a package based on download speed alone.
Separate migration traffic from normal usage
Moving files, databases, virtual machines or backups to the cloud can create a temporary increase in outbound traffic. If this uses the same capacity as voice calls, video meetings, remote desktop sessions and business applications, staff may experience disruption during the migration. A migration plan should therefore identify when large transfers will take place, how much data needs to move and whether the transfer can be throttled or staged.
Upload capacity is particularly important because many cloud migrations send data from the business premises to a hosted environment. A connection with a strong download specification but limited upload capacity may make data transfer take longer than expected. The assessment should use measured traffic patterns and the size and type of the data rather than relying solely on the advertised speed of the service.
Check quality, not just capacity
Cloud applications are affected by packet loss, jitter and inconsistent latency as well as by congestion. These issues can make hosted desktops feel unresponsive, interrupt real-time communications and cause sessions to disconnect. Testing should take place at different times and from the locations where staff actually work, including offices with wireless access points, remote sites and any premises connected through site-to-site links.
Latency also depends on the route between the business and the cloud platform. Applications that are interactive, such as remote desktops or cloud-based telephone systems, generally need a consistent path rather than simply a large maximum bandwidth figure. Where several offices will use the same cloud environment, each site should be assessed individually; the main office’s connection does not compensate for a poorly connected branch.
Review the office network
The connection to the premises is only one part of performance. Switches, wireless access points, cabling, network address translation and internal routing can all become bottlenecks. Before migration, check that:
- network equipment has sufficient capacity for the expected number of users and devices;
- wired connections are available for equipment that needs consistent performance;
- wireless coverage supports the areas where cloud applications are used;
- guest, operational and administrative traffic are separated where appropriate; and
- older network equipment will support the required security and traffic-management features.
Quality-of-service rules may be useful where essential traffic competes with large transfers or less important downloads. These rules need careful testing, since prioritising one service can reduce the capacity available to another.
Consider how users and services will connect
Cloud access may involve web applications, synchronised files, hosted desktops, application programming interfaces, backup services and connections between on-site systems and cloud resources. Each has different traffic characteristics. For example, synchronisation tools may generate continuing background traffic, while cloud backup may create large outbound transfers. Mapping these dependencies helps establish whether the connection can support the proposed design.
Remote and multi-site workers should be included in the assessment. The business should document how users will reach cloud services, whether traffic is routed directly to the internet or through a central office, and whether any virtual private network adds processing or bandwidth overhead. Centralising all traffic through one site can simplify control, but it can also make that site and its connection a constraint.
Plan for name resolution and routing
Cloud services depend on reliable domain name resolution. Incorrect or poorly performing DNS configuration can prevent users from reaching applications even when the internet connection itself is working. Migration planning should also review firewall rules, routing tables, proxy settings and any filtering that could block required cloud endpoints. These changes should be tested before users are moved across.
Some cloud platforms use changing service addresses or distribute traffic across multiple locations. Security rules based on a small, fixed list of addresses may therefore become difficult to maintain. The appropriate approach depends on the service, but access controls should be based on documented provider requirements and reviewed as part of change management.
Decide whether one connection is sufficient
A second connection may be appropriate where loss of the primary service would stop access to essential systems. It should be evaluated for genuine independence: two services that share the same physical route, cabinet or upstream provider may not provide the separation expected. Failover should be configured and tested, including the behaviour of firewalls, VPNs, DNS and cloud applications when the route changes.
For smaller organisations, a secondary fixed line or mobile-based service may be suitable in some locations. The right option depends on local availability, expected usage, security requirements and the consequences of losing access. It is also important to confirm whether the backup has enough capacity for essential work rather than assuming it can support every service at full scale.
Use a structured connectivity assessment
- List the cloud applications, users, sites, devices and data sets involved.
- Measure current download and upload utilisation, latency, packet loss and peak demand.
- Estimate the additional traffic created by migration, synchronisation, backup and remote access.
- Test the internal network, wireless coverage, routing and security equipment.
- Define which services are essential during a connection failure.
- Test migration traffic and failover before the wider rollout.
- Continue monitoring performance after migration so that recurring congestion or routing problems can be identified.
Connectivity requirements should be documented alongside the cloud migration plan, including ownership of each connection, escalation arrangements with the provider, configuration records and the tests needed after any change. A managed IT provider such as S2 Technology Group can help assess business connectivity as part of a broader cloud and infrastructure review, ensuring that the proposed cloud design matches the organisation’s actual network conditions.
Connectivity for cloud migration should be assessed as a business service, not selected on advertised speed alone. The contract and technical specification should show whether the connection is suitable for sustained business use, cloud access and any security or site-to-site services the migration design requires.
Before choosing or renewing a connection, confirm:
- whether the service has usage limits, traffic management or restrictions that could affect cloud synchronisation and backups;
- what fault-reporting process, service commitments and maintenance arrangements apply;
- whether a fixed public IP address is needed for a firewall, virtual private network or other access control;
- which equipment is supplied, who manages it and whether it can support the required security configuration; and
- whether the provider can supply technical information for escalation, monitoring and future capacity planning.
These details help distinguish a connection that is merely fast from one that fits the proposed cloud architecture. They should be recorded with the migration design so that changes to the service, provider or network equipment can be assessed before they affect access to cloud systems.
