Lumen help

Network: Ethernet testing methodologies

Lumen uses industry-standard testing to help ensure that your Ethernet-enabled services perform correctly at turn-up and continue to meet your business needs. Below, is a detailed explanation of our testing methodology. If you have any questions, please contact your provisioning representative or your Network Operations Center (NOC) technician.

EtherSAM test details

Service configuration test

Service configuration testing tests each stream individually to verify that the stream configuration in the network is correct.


The default configuration for this test is that each phase CIR/EIR/"traffic ramp police rate” will run for 5 seconds each for each stream. Given this, stream 1 should take approximately 15 seconds to complete before it moves on to stream 2; stream 2 should take 15 seconds to complete before moving on to stream 3, etc.


Note: The configuration test is the only test where the EIR and “overshoot” are used. Additionally, the EtherSAM service configuration is highly customizable to fit the service attributes of an ethernet service, whether it is a simple E-Line point-to-point or an IPVPN that uses Ethernet as an access method.

Service performance test

Service performance tests test all enabled streams—at the same time—to verify that the network can handle all your purchased streams at the same time and at the purchased rate.


Note: The service performance test only uses the CIR value defined in the stream. All enabled streams are running at the same time (in parallel). Each stream receives a pass/fail verdict.


Note: The EtherSAM test results (available upon request) provide information for a “birth certificate” which might be delivered to you upon the completion of the service order.

Additional testing

Demarcation testing policies and procedures for all Ethernet products

Test and validate team layer 2 testing
(before service ready)
Activation window
(reactive, as needed)
Additional troubleshooting post-activation
(reactive, as needed)
EtherSAM for most ethernet access products.

Waves are an exception and RFC2544 is still the standard testing.
EtherSAM, upon request, as window permits. In-depth EtherSAM, then ExacTCP and/or RFC6349.

Comparison of standardized Ethernet testing methodologies vs. iPerf:

Lumen understands that, in some instances, if none of the three described standardized methodologies are able to provide satisfactory results or are unable to help to resolve a circuit throughput issue observed at the upper layers of the OSI model, your Lumen technician might fall back to test with iPerf, but note that because of the lack of standardization, iPerf has been proven to be more time consuming and in average requiring more truck rolls than the standardized methodologies in most cases.

Layer 4
Key features Standardized?
ITU-T Y.1564sam UDP UDP flow capable, EMIX packets that emulate real world traffic, QoS markings validation using differentiated services Yes
ExacTCP Customizable to 1 TCP flow connection, TCP RWIN scaling as per RFC1323 Yes
RFC6349 Multiple TCP flows, Path MTU Discovery. Calculates BDP for multiple TCP windows Yes
iPerfv2 Open Source, available for multiple platforms, UDP & TCP, incompatible with iPerfv3 No
iPerfv3 Open Source, available for multiple platforms, UDP & TCP, incompatible with iPerfv2 No