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 within an ATM network.

LAN Emulation This section identifies important characteristics of data exchange

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.

ATM host

Existing applications

Network interface driver

LAN emulation

AAL5

ATM

Physical layer

ATM switch

ATM

Physical

Physical

 

 

 

 

 

 

 

 

ATM Backbone SwitchModule and Ethernet SwitchModule

 

Bridging

LAN

 

emulation

AAL5

MAC

 

ATM

 

Physical

Physical

Ethernet/FDDI host

Existing applications

Network interface driver

MAC

Physical layer

Figure 2-5LAN Emulation Protocol Stacks

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3Com 5000 ATM manual Virtual Bridge vbridge, Emulated LAN Elan