Higher classes of service offer higher availability SLAs and allow you to increase traffic prioritization for your EVC:
- Basic (best effort): The service may be oversubscribed on the Lumen network.
- Enhanced (mid class): Enhanced EVCs (ethernet virtual circuits) can still be oversubscribed like Basic class of service EVCs; however, traffic is marked with an internal class of service marking which will prioritize your traffic over best-effort traffic during times of congestion. For EVCs with this class of service, bandwidth is not reserved on the Lumen network and traffic will not take priority over real-time traffic in the network.
- Dedicated (real time): The quality of service offering with highest priority on the Lumen network. In addition, Lumen reserves the bandwidth for this EVC across the network on each ring that the EVC touches. Once it is dedicated to you, that bandwidth (and the corresponding CE-VLANs) sits in reserve regardless of how much bandwidth you use.