Ethernet OAM in cesnet backbone

CESNET is an association of universities and Academy of science of Czech republic. It is operating a national research and education network (NREN) interconnecting all university cities in the republic. Since ATM and SDH technologies were replaced by ethernet technology in WAN data networks CESNET maintains its backbone network mostly on dark fibre leased from various vendors. On some lines it very reasonable to use external mediaconverters with special SFP modules. It allows us to employ ethernet OAM technology for better monitoring of these lines.