Cabletron Systems MMAC-Plus SFCS-1000, Configuration Manual

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GLOSSARY
LEC (LAN Emulation Client) - the component in an end system that per-
forms data forwarding, address resolution, and other control functions when
communicating with other components within an ELAN.
lecs - a FORE program that implements the assignment of individual LECs to
different emulated LANs.
LECS (LAN Emulation Configuration Server) - the LECS is responsible for
the initial configuration of LECs. It provides information about available
ELANs that a LEC may join, together with the addresses of the LES and BUS
associated with each ELAN.
leq - a FORE program that provides information about an ELAN. This infor-
mation is obtained from the LES, and includes MAC addresses registered on
the ELAN together with their corresponding ATM addresses.
LES (LAN Emulation Server) - the LES implements the control coordination
function for an ELAN. The LES provides the service of registering and resolv-
ing MAC addresses to ATM addresses.
LLC (Logical Link Control) - a protocol developed by the IEEE 802 commit-
tee for data-link-layer transmission control; the upper sublayer of the IEEE
Layer 2 (OSI) protocol that complements the MAC protocol; IEEE standard
802.2; includes end-system addressing and error checking.
LOF (Loss Of Frame) - a type of transmission error that may occur in wide-
area carrier lines.
looptest - a program that tests the interface for basic cell reception and trans-
mission functionality. It is usually used for diagnostic purposes to determine
if an interface is functioning properly.
LOP (Loss Of Pointer) - a type of transmission error that may occur in wide-
area carrier lines.
LOS (Loss Of Signal) - a type of transmission error that may occur in wide-
area carrier lines.
MAC (Media Access Control) - a media-specific access control protocol
within IEEE 802 specifications; currently includes variations for Token Ring,
token bus, and CSMA/CD; the lower sublayer of the IEEE's link layer (OSI),
which complements the Logical Link Control (LLC).
Metasignalling - an ATM Layer Management (LM) process that manages dif-
ferent types of signalling and possibly semipermanent virtual channels (VCs),
including the assignment, removal, and checking of VCs.
Metasignalling VCs - the standardized VCs that convey metasignalling
information across a User-to-Network Interface (UNI).