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New Ethernet Standard: EtherSAM

EtherSAM: Fast and Accurate Testing for Real-Life Scenarios

With multiclass Ethernet services being deployed globally, legacy test standards such as RFC 2544 are no longer adequate to validate today’s service-level agreements (SLAs). With customers thirsty for a new test methodology due to aggressive deployment plans, largely driven by the migration to packet-based mobile backhaul infrastructure worldwide, EXFO was the first to introduce the recently approved ITU-T Y.1564 standard (formerly known as Y.156sam) to the market on its modular Ethernet testing solution—even before the standard was officially approved.

Having initiated the concept for the new ITU-T Y.1564 standard in June 2009, and having worked closely with industry experts throughout its adoption process, EXFO recognized the urgent need for a more efficient and complete way to commission and troubleshoot mobile backhaul and business Ethernet services.

Full SLA Validation in a Single Test
Aligned with the requirements of today’s Ethernet services, the EtherSAM test methodology enables complete validation of all SLA parameters in a single test to ensure optimized quality of service (QoS).

Contrary to other methodologies, EtherSAM supports new multiservice test offerings. It can simulate all types of services that will run on the network and simultaneously qualify all key SLA parameters for each of these services. Moreover, it validates the QoS mechanisms provisioned in the network to prioritize the different service types, resulting in more accurate validation and much faster deployment and troubleshooting.

EtherSAM: Fast and Accurate Testing for Real-Life Scenarios
Since its availability in early 2010, EtherSAM has proven to be instrumental in real-life scenarios—drastically speeding up deployment and eliminating repeat testing by offering full visibility into all SLA metrics, immediately and accurately. EXFO’s customers embraced EtherSAM for its speed and the high level of accuracy with which they can validate new services.

EtherSAM is comprised of two phases, the service configuration test and the service performance test.

Service Configuration Test

The service configuration test consists in sequentially testing each service. It validates that the service is properly provisioned and that all specific KPIs or SLA parameters are met. A ramp test and a burst test are performed to verify the committed information rate (CIR), excess information rate (EIR), committed burst size (CBS) and excess burst size (EBS).

Ramp Test, Burst Test


Service Performance Test

Once the configuration of each service is validated, the service performance test simultaneously validates the quality of all the services over time.

In this phase, all services are generated at once at their CIR, and all KPIs are measured for each service. This can take only a few minutes, or it can easily be transitioned to longer-term testing (e.g., 24 hours).

EtherSAM: simultaneous validation

Loopback or Bidirectional Testing

EXFO’s EtherSAM approach proves even more powerful as it executes the complete ITU-T Y.1564 test bidirectionally. Key SLA parameters are measured independently in each test direction, thus providing 100% first-time-right service activation—that is the highest level of confidence in service testing.

Loopback test, bidirectionnal testing

Eight Times Faster Ethernet Deployment

The benefits of EXFO’s new standard-based EtherSAM are measurable. It allows for complete SLA validation with a single test, eight times faster deployment and 100% first-time-right service activation. Plus, with EXFO’s unique real-time asymmetrical test capabilities, network operators can truly benefit from unmatched service performance visibility—all the while optimizing the quality of service and reducing operational costs.

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