LAN Emulation Data Exchange 2-5
Virtual Bridge (vbridge)
You create virtual bridges on CoreBuilder 5000 SwitchModules. You
assign each bridgeport-LEC to a vbridge on a SwitchModule in the
CoreBuilder 5000 hub.
Emulated LAN (ELAN)
You assign each bridgeport-LEC to an ELAN in the ATM network. An
ELAN is a logical LAN grouping of LECs wi thin an ATM network.
LAN Emulation Data Exchange
This section identifies important characteristics of data exchange
between a SwitchModule and an ATM network.
Protocol Stacks The LAN emulation protocol stacks used in the exchange of data
between a SwitchModule-based LAN and ATM host are shown in
Figure 2-5.
Figure2- 5 LAN Emulation Protocol Stacks
Physical layerPhysical
Physical layer Physical
ATM
AAL5
LAN
emulation
Bridging
MAC MAC
Network interface
driver
Existing applications
Physical Physical
ATM
Existing applications
ATM
AAL5
LAN emulation
Ethernet/FDDI hostATM Backbone SwitchModule
and Ethernet SwitchModule
ATM swit chATM hos t
Network interface
driver