Automatic Performance Tests
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7.2.Performance Assessment with the eSAM Test
Ethernet service activation though eSAM defined in ITU-T 1564 has arisen as an
alternative to RFC 2544 verification. Unlike the RFC 2544, eSAM is designed for
Ethernet service activation from the beginning. The advantages of eSAM in front of
RFC 2544 are summarized in the following points:
1. Faster execution: An standard eSAM test is made up of a short configuration test
and a longer performance test. If the configuration test fails there is no need to
execute the long performance test. The result is that network administrators have
time to correct any configuration issue before having to wait for the complete test
execution.
2. FDV results. Frame Delay Variation (FDV) is a key metric to evaluate network per-
formance. FDV is very sensitive to congestion and other degradations that affect
Figure 7.4: (a) Port based Ethernet service, one service per port. (b) Ethernet service
multiplexing based on service delimiting markers like the VLAN tag.
Service provider
edge device
1
2
3
4
K
...
Service provider
edge device
1.K
...
(a)
(b)
VID
1
VID
2
VID
3
VID
4
VID
K
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