1731 augments
this with performance monitoring as well.
Performance monitoring allows the measurement of typical SLA parameters around
error counts and delay measurements such as loss of Ethernet frames, delay between
frames, variation between consecutive delays (also known as jitter), and other information
such as link up or down, throughput, and so on.
Currently, the Y.1731 standard supports performance monitoring only for address Pointto-
Point connectivity at this time (multipoint connectivity is expected in the next phase).
The ITU group is working closely with IEEE 802.1ag group to ensure alignment and
preclude any conflicting approaches.
IEEE 802.3ah Ethernet over First Mile The IEEE 802.3ah OAM is also known as
Ethernet First Mile (EFM) OAM and provides OAM between the Ethernet ports at the
CPE and the Provider Edge (the ???first mile???), which is deployed over a physical IEEE
802.3 medium (copper, fiber, or PON). In fact, the IEEE 802.3ah also addresses the PHY
(physical) layer characteristics for the different media in the first mile; the OAM part
of the IEEE 802.3ah is, however, independent of the physical layer. EFM OAM is the
first standards-based effort to ensure Ethernet devices in Service Provider networks
have an inherent management capability.
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