metrotek Bercut-ETL, Operating Manual

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1. General description
Ethernet/Gigabit Ethernet loopback device Bercut-ETL is intended for
loopback performing at the physical, data link, network and transport layers
of the OSI model in IP/Ethernet networks.
Incoming traffic is being retransmitted backward with possibility of source
and destination MAC/IP addresses and TCP/UDP port numbers swapping.
To switch between loopback layers L button is used. The device allows to
perform loopback control via OAM protocol and remote control via TELNET
protocol.
Bercut-ETL. Operating manual