FW: Transparent 1Gig Ethernet over IP/Ethernet?

[chris.burri at hotmail.ch (chris burri)]

Hi all,
 
I need to transparently (especially LACP 
frames) transport a gigabit Ethernet link with at least 1500 MTU over 
either IP or Ethernet. Jumbo frames are enabled on 
the transport backbone. While I need "full" (some encap overhead will be acceptable) GigE wire speed, encryption 
is unnecessary.
 
Can anyone suggest a product -ideally some low-maintenance, high-reliability, perhaps ASIC-based hardware- that can do this?

TIA
Chris