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CHAPTER
14-1
ATM Switch Router Software Configuration Guide
OL-7396-01
14
Configuring LAN Emulation
This chapter describes LAN emulation (LANE) and how to configure it on the ATM switch router.
Note This chapter provides advanced configuration instructions for the Catalyst 8540 MSR,
Catalyst 8510 MSR, and LightStream 1010 ATM switch routers. For an overview of LANE architecture
and operation, refer to the Guide to ATM Technology. For complete descriptions of the commands
mentioned in this chapter, refer to the ATM Switch Router Command Reference publication. For a
detailed description of LANE and its components, refer to Cisco IOS Switching Services Configuration
Guide: Virtual LANs.
This chapter contains the following sections:
• LANE Functionality and Requirements, page 14-1
• LANE Configuration Tasks, page 14-2
• LANE Configuration Examples, page 14-17
LANE Functionality and Requirements
LANE uses ATM as a backbone to interconnect existing legacy LANs. In doing so, LANE allows legacy
LAN users to take advantage of ATM’s benefits without requiring modifications to end station hardware
or software.
Multiple emulated LANs (ELANs), which are logically separated, can share the same physical ATM
network and the same physical ATM interface. LANE makes an ATM interface look like one or more
separate Ethernet or Token Ring interfaces.
LANE services provide connectivity between ATM-attached devices and LAN-attached devices. Two
primary applications for the LANE protocol are as follows:
• Connectivity between LAN-attached stations across an ATM network, effectively extending LANs
over a high-speed ATM transport backbone.
• Connectivity between ATM-attached hosts and LAN-attached hosts. Centralized hosts with
high-speed ATM port adapters provide services, such as Domain Name System (DNS), to traditional
LAN-attached devices.