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Ethernet WAN Services

Ethernet Demarcation DevicesCircuit 'Turn-Up' Testing & In-Service Assurance for Layer-2

and Layer-3 Network infrastructures

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Ethernet (L-2) Network - Typical Scenario

Customer LANSite A

Network Operation Centre (NOC) Console

Customer LANSite BService Provider's

Ethernet Demarcation Devices

Value-AddedServices

Infrastructure CarrierEthernet Circuit

Infrastructure CarrierEthernet Circuit

ManagementAccess

ManagementAccess

EthernetService Provider

Core Network

Ethernet Service Providers typically offer End-to-End or Core-to-Edge services for their customers, which frequently involve infrastructure, or at the least simple 'tail circuits', from 3 rd party Carriers. In order to manage configurations and monitor both customer site access and network performance right out to the edges of the network, Ethernet Demarcation Devices (EDDs) are deployed at customer connection points, managed from the Service Provider's Network Operations Centre (NOC).

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Ethernet Service Commissioning Tests

CustomerSite A

EthernetService Provider

Core Network

CustomerSite B Infrastructure Carrier

Ethernet Circuit Infrastructure Carrier

Ethernet Circuit

1. Log in to EDD at Site A

3. Ethernet (L-2) Test traffic generated at A is looped back at B (SA/DA swapping, via 'SAM' hardware) for analysis back at A

4. Results at A can be viewed from NOC console or transmitted to the NOC for inclusion directly to 'birth certificate' documentation

2. Set-Up RFC2544 or Y.1564 Test in relation to customer SLA for service(s) between sites A and B

Network Operation Centre (NOC) Console

Service Providers need initially to demonstrate that they have provisioned circuits in accordance with their customers requirements, so use this process for comprehensive Service Level Agreement (SLA) verification testing.

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Subsequent 'In-Service' Monitoring

CustomerSite A

EthernetService Provider

Core Network

CustomerSite B Infrastructure Carrier

Ethernet Circuit Infrastructure Carrier

Ethernet Circuit

NOC Console Log-In to set upAgreed Service Parameters

(SLA)

Log-In to set upAgreed Service Parameters

(SLA)

Pro-active SNMP 'Trap'alarm sent to NOC ifagreed SLA not met

Pro-active SNMP 'Trap'alarm sent to NOC ifagreed SLA not met

Y.1731 protocol exchanges time-stamped test packets in order to monitor service parameters relative to pre-defined customer SLA

Subsequently, Service Providers require to monitor that SLA performance metrics continue to be satisfied 'in-service'. Pro-active alarming of potential 'SLA breach' conditions enable quick and effective remedial action, to the benefit of both Service Provider and customer.

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Testing with an IP Network infrastructure?

CustomerSite A

CustomerSite B

Service ProviderCore Network

MPLS (Layer-3, IP) Infrastructure

Edge/Access Network(Typically Layer-2)

Edge/Access Network(Typically Layer-2)

If the Service Provider is provisioning a Layer-3 network, typically an IP-VPN, but the customer is deploying their own Routers, then the Service Provider often still requires management visibility at the customer hand-off point. To enable End-to-End performance testing and monitoring, then Layer-2 test functionality alone within the Demarcation Devices is insufficient. Ethernet MAC packets cannot traverse Layer-3 elements of the network and Layer-3 (IP) packets are required. RFC2544 and/or Y.1564 testing is agnostic to packet type, so IP-addressed frames can just as readily be used, provided that the EDDs support this, along with the necessary IP configuration tools and processes (e.g. ARP for IP Gateway address mapping). Metrodata will support this functionality in the FCM9003 and FCM9005 EDDs.

ManagementAccess

ManagementAccess

NOC Console

Service Provider'sEthernet Demarcation Devices

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And for in-service performance monitoring?

CustomerSite A

CustomerSite B

Service ProviderCore Network

MPLS (Layer-3, IP) Infrastructure

Edge/Access Network(Typically Layer-2)

Edge/Access Network(Typically Layer-2)

NOC Console

TWAMP protocol exchanges time-stamped test packets in order to monitor service parameters relative to pre-defined customer SLA

TWAMP-lightcontroller

TWAMP-lightresponder

For networks including Layer-3 (IP) elements, the 'Two-Way Active Measurement Protocol' (TWAMP) performs a similar role to that of Y.1731 for 'Layer-2 only' networks, i.e. to monitor Latency and Jitter performance characteristics, providing alarms in the event of breaches of the customer's SLA criteria.

Log-In to set upAgreed Service Parameters

(SLA)

Log-In to set upAgreed Service Parameters

(SLA)

Pro-active SNMP 'Trap'alarm sent to NOC ifagreed SLA not met

Pro-active SNMP 'Trap'alarm sent to NOC ifagreed SLA not met

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Metrodata Ethernet Demarcation DevicesFCM9002 Low cost, flexible EDD including single-level VLAN push/pop and support for

circuit set-up testing (RFC2544 and Y.1564) plus Y.1731 for in-service Assurance, for Layer-2 Ethernet services only

FCM9004 Advanced Layer-2 EDD, supporting multi-level VLAN push/pop, comprehensive

multi-flow testing and in-service Assurance

FCM9003 (from Q3, 2015) Adds IP-addressing to the FCM9002, for RFC2544 and Y.1564 testing, plus

TWAMP-light for in-service monitoring, for Layer-2 and/or Layer-3 networks

FCM9005 (from Q3, 2015) Adds IP functionality similarly to the FCM9004

Metrodata's FCM9003 & FCM9005 platforms include both Layer-2 and Layer-3 circuit testing and in-service monitoring regimes, offering deployment flexibility for each of Layer-2, Layer-3 & hybrid networks.

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Thank you!

Ethernet WAN Services