1. At the LECS, use ATMaddresses to assign clients to the LES. See “Overview
of the LECS Function” on page260 for more information.
2. Activate the LECS Interface on the router.
3. Activate the security option of the LESs.
4. Activate LECS Access Controls for anyATM address prefixes that should not be
allowed to access the LECS.
5. Use

Address Screening

at the ATMswitches. This option causes switches to
validate that calling stations use their actual ATMaddresses in the call setup.
Thus, stations cannot impersonate other stations.
These steps ensure that stations are correctly identified and that only authorized
stations join the ELAN.
Key Configuration Parameters for LAN Emulation
This section briefly describes the required configuration parameters of the router
LAN emulation components. The ATMinterface for the LAN emulation components
must be defined before the components can be created.
1. LEC:
Tocreate an LE client, you only need to specify the ELAN type. If you define
two LE clients on a single ATMinterface and bridge them together, then one of
the LE clients must use a non-default MAC address. By default, LE clients use
the burned-in MAC address of the ATMinterface. The default maximum frame
size is 1516 bytes for Ethernet LE clients and 4544 bytes for token-ring LE
clients.
Overview of LAN Emulation
272 MRS V3.2 Software User’s Guide