Table of Contents
Advertisement
LES
LLC
local path
M port
MAC
MIB
multicast packet
multicast storm
multicast packet
firewall
NAC
NNI
LAN Emulation Server. The LES implements the control coordination
function for the Emulated LAN. It also provides a facility for registering and
resolving MAC addresses and route descriptors to ATM addresses.
Logical link control. The upper sublayer of the data link layer of the OSI
seven-layer reference model. The LLC handles error control, flow control,
and frames transmission between stations. The IEEE 802.2 standard is the
most widely implemented LLC protocol. See also data link layer.
See FDDI paths.
Master port. Each PHY/PMD pair, designated a port, belongs to one of four
types: A, B, M, or S. Concentrator stations (DAS and SAC) contain one or
more M ports to provide connection within the concentrator tree.
Media Access Control. A station resource that specifies the lower sublayer of
the data-link layer for FDDI. It presents the specifications and services
provided for conforming FDDI attachment devices. MAC specifies access to
the medium, including addressing, data checking, and data framing. See
also data link layer.
Management Information Base. Stores a device's managed characteristics
and parameters. MIBs are used by Simple Network Management Protocol
(SNMP) and Common Management Information Protocol (CMIP) to contain
attributes of their managed systems. The LANplex system contains its own
internal MIB.
A single packet that is copied to a subset of addresses in a network. See
also broadcast packet.
See also broadcast/multicast storms.
A mechanism in the LANplex system that limits the rate at which multicast
packets are forwarded through the system. This threshold is configurable.
Null attachment concentrator. A system configured in such a way that it has
no attachments to the FDDI dual ring. A no-attach station contains no A, B,
or S ports.
Network-to-network interface. The interface between two ATM network
nodes.
O
G
PERATION
LOSSARY
7
Advertisement
Table of Contents
