
medium dependent in Ethernet terminology) with common form factors and
common electrical interfaces, which can be used interchangeably with different
systems. Metro Ethernet Forum (MEF) [11], another industry consortium, is
defining Ethernet service types, operation, administration, and maintenance
(OAM) functions, and service level agreements (SLAs).
Within the international telecommunication union (ITU), standards have been
published on carrying Ethernet over time-division multiplexing (TDM) circuits.
These include the generic framing procedure (GFP) defined in ITU-T G.7041 [12],
virtual concatenation (VCAT) defined in ITU-T G.7043 [13], and link ...