The answer depends on the technology, access medium and managed services.
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At the most high level, there’s the perceived cost of the technology services. In general, the market supports the notion that using Internet connectivity with VPN security (IPSec) is the most cost-effective solution to meet a tight budget. Whereas MPLS is deemed to be a high cost in part due to features such as privacy and quality of service (QoS). And then there’s the new market contender, SD-WAN.
Above, the Medivet team at one of our free WAN pricing and technology workshops.
Saving money on network operations is a high-level goal and could potentially result in negative consequences without the correct analysis. A crucial often missed component of WAN cost reduction is how managed networks bought on the basis of low pricing often constrain businesses resulting in hidden costs due to business process impact. Let's look at each networking capability type.
The Internet VPN is experiencing somewhat of a resurgence due to the popularity of BYOD (Bring your own Device), remote working and public based cloud computing. In the late 1990s and early 2000s, the Internet VPN became an attractive alternative to Frame Relay and ATM. The Enterprise had become used to paying relatively high premiums. The realising that businesses could leverage their Internet connectivity for WAN services created a new market.
Today, public based IP VPN is viewed as a basic cost effective method of securing networking devices, home workers and small branch offices. I freely admit that this view is very generalist as there are multiple large organisations using IPSec solutions but the market view is one of specific use cases with the perception of low cost.
Around 2002, layer 3 VPRn (Virtual Private Routed Networks - referred to as MPLS) hit the seen with promises of end to end traffic priority (QoS) and inherent privacy removing the complexity of IPSec. The value justified the cost premium vs. Internet connectivity. With 2Mbps connectivity bandwidth representing the most popular option, QoS provided an opportunity to prioritise mission-critical traffic. The average Enterprise was willing to pay the cost for privacy and application control.
There is a significant amount of buzz surrounding SD-WAN both from the ability to support any connectivity type with significant feature benefits through to huge cost savings.
The buzz surrounding SD-WAN is huge right now.
In reality, the majority of cost saving preaching is from SD-WAN vendors leveraging Internet connectivity as a comparison to MPLS solutions. In other words, the marketing suggests an Enterprise should be able to procure the most cost-effective public IP (Internet) connection for any given location and layer on an SD-WAN device. There is truth in that statement, but the implications must be carefully considered when looking at WAN cost. Global latency, service levels, support and even the stability of using multiple telco services are just a few considerations.
Our BT Partnership firmly believes SD-WAN technology represents the future of WAN services based on the fundamentals of data security, treatment of application traffic and the capability to terminate and circuit type from whichever global provider you may believe to represent a good fit.
SD-WAN discussions are out of scope for this article, but readers should check out our article on SD-WAN vs. MPLS to gain further clarity.
As a technology, SD-WAN is more than cost saving achieved by leveraging cheap Internet connectivity. In fact, one of the key SD-WAN benefits resides in the technologies ability to support any data connectivity medium.
The edge router - CPE (Customer Premise Equipment) capability and type is directly attributed to both throughput and solution feature-set. We normally propose Cisco hardware but sometimes deal with Juniper depending on the BT product in question. Over and above features and throughput, you may require two routers in a high availability configuration which increases cost.
The feature-set may include QoS, Firewall services, reporting, encryption and so forth. With every solution feature, more memory and CPU performance will be required resulting in a larger, more capable device with higher costs.
The tail circuit - The access pricing to your site will be based on distance to the provider's network and circuit size. A location situated out of a metro area will result in higher cost vs. An office next door to the local PoP (Point of Presence). In some instances, metro office locations may be classed as on-net resulting in massive cost reduction due to no networking tail requirement.
Other elements include diversity where a second circuit is routed as failover to the primary with no single point of failure, subject to survey. The WAN cost implication depends on work required to create the diversity and tail circuit distance to the second diverse PoP location.
WAN circuit size - The cost of Ethernet services has decreased measurably over the last five years. The average Enterprise is now opting for 1Gbps services which are perhaps the most prominent change vs. the tradition 100Mbps option. To further decrease WAN cost, further data networking options exist including tiered bandwidth and burst traffic options.
Managed WAN services - The elements of Managed Services are numerous, but essentially the cost will relate to both the hardware, installation, support and people resources servicing your account on an ongoing basis. When comparing WAN providers, the elements offered within contract vs. the elements offered as extras must be identified. Resources such as project management and service management may be included within your costs, but often, specialist teams are an additional component of proposed products.
Network monitoring - Good statistical data analysis will save money due to insights provided when growth or decline of traffic is identified. Armed with good all round data, you’re business will be able to baseline measurements for every component of the network and measure over time. The cost of adding statistics varies depending on the value proposition as newer technology is brought to the market.
Change requests - The subject of change costs could relate to simple ongoing administration changes to the network or more complex additions due to business growth perhaps by merger or acquisition. Understanding your business strategy will go someway to understanding the impact of growth and change.
In general, WAN providers will support your organisation with simple change requests for a nominal fee. The more complex changes may require additional technical design authority or project management - clarity on these potential costs is highly recommended.
Contract length - Discounts are provided for term contracts, typically 3 or 5 years. The assumption often made by IT teams is that
Data Security and Cloud - The network today is much more than simple connectivity. IT teams now have to consider the surrounding elements of comms to calculate the cost of WAN services. Security is of paramount importance, representing a significant component of WAN cost. One of the reasons SD-WAN services are receiving attention is in part due to the inbuilt granular security policies. The ability, regardless of connection, to apply packet inspection. Cloud resources support the WAN via backup and storage and DR (Disaster Recovery).
Global connectivity - National UK connectivity is easier to predict when setting WAN cost budgets, although PoP distance remains a factor. On the flip side, Global WAN costs are somewhat harder to calculate as the pricing is far more variable vs. region. As an example, UAE pricing is often found to be the highest of any location on a global basis. At a base level, the further your office from the local, regional POP, the greater the data bandwidth pricing increase.
Achieving the best possible commercial outcome is dependant on a couple of factors:
Above. The elements of WAN pricing.
Got a project? Start a proposal.Until this is the case, IT teams must articulate the components of their requirements and seriousness to buy the capability. Special pricing (as the department is typically called) will, as a rule, provide more focus on bid submissions which state a) the requirements and b) the intent to buy the service.
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