Managed Carrier Ethernet Service Demarcation: MetroCONNECT


Telecommunications Carriers require to deliver Ethernet services as an infrastructure either for high-capacity IP VPN networks or indeed for Layer-2 VPN or VPLS-based services.

Customers increasingly demand stringent 'Service Level Agreements' (SLAs) which go beyond conventional installation and maintenance criteria such as deployment lead-time, availability 'up-time' and 'Mean Time to Repair' etc. Mindful of the need to support applications sensitive to network performance, today's customers are concerned with site-to-site performance characteristics of their network connections, such as Committed Information Rate (CIR), Packet-Loss Ratio (PLR), Delay (or 'latency') and Delay Variation (or 'jitter'). In order to ensure end-to-end visibility and monitoring of such characteristics, Carriers and Ethernet Service Providers must deploy 'Ethernet Demarcation Devices' (EDDs) as Manageable Customer Premise Equipment, situated at the boundary between the Carrier's WAN and the Customer's LAN able to test and monitor link performance and provide alarms in the event of below-par response.

EDDs must not only be comprehensive in their range of testing, reporting and alarming functions, but must be easy to deploy, without requiring on-site configuration by highly skilled staff.

Typical features of such devices include:

  • 'Zero Touch Provisioning' (ZTP), under which device configuration can be prepared off-line and downloaded remotely as soon as a new EDD is deployed, without Engineering intervention. EDDs should also respond to service configuration changes originating from Network Orchestration Platforms within 'Software Defined Networking' (SDN) environments which are increasingly being deployed by leading Carriers.
  • Management visibility to LAN and WAN connection state at the customer site
  • Flexible VLAN support using 802.1Q, including Q-in-Q stacked VLANs, in order to differentiate services across the WAN
  • Quality of service differentiation using 802.1p and/or DSCP based traffic prioritisation, with traffic policing and shaping
  • Service Activation Testing using RFC2544 and/or Y.1564
  • In-Service performance monitoring against pre-defined Service Level Agreement criteria, using Y.1731 and/or TWAMP (Two-Way Active Measurement Protocol)
  • Comprehensive 'tunnelling' controls for customer-specific control protocols across the Carrier's network, which may otherwise be blocked, thus ensuring WAN transparency to customer applications

Some typical Ethernet Network Deployment examples using Managed Demarcation devices

MetroCONNECT Carrier Ethernet Demarcation Devices

Carrier Ethernet Demarcation

Metrodata offers a range of Ethernet Demarcation Device with support for these functions, whilst maintaining the lowest possible unit cost:

Our EDD range supports automated fibre fault localisation via integrated OTDR functionality.