udlr

["bc azur" <azurbc@voila.fr>]

Dear Sir,
I would like to know in the satellite infrastructure what udlr implies 
practically? Does it mean that you have to put a server in front of the 
gateway and a software on each client receiving the satellite? It's a 
level 2. What happens to the Ethernet packets? Is it encapsulated into a
 sort of UDLR packets and then forwarded to the the gateway.How is the 
dialogue between the server and the receiving client? If a client is on 
a LAN how is the dialogue with the receiving client?
many thanks bc