ZyXEL Communications XGS3600 Series Manual page 337

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LACP
LACP is an IEEE 802.3ad standard protocol. The Link Aggregation Control Protocol,
allows bundling several physical ports together to form a single logical port.
LLC
The IEEE 802.2 Logical Link Control (LLC) protocol provides a link mechanism for upper
layer protocols. It is the upper sub-layer of the Data Link Layer and provides multiplexing
mechanisms that make it possible for several network protocols (IP, IPX) to coexist within
a multipoint network. LLC header consists of 1 byte DSAP (Destination Service Access
Point), 1 byte SSAP (Source Service Access Point), 1 or 2 bytes Control field followed by
LLC information.
LLDP
LLDP is an IEEE 802.1ab standard protocol.
The Link Layer Discovery Protocol(LLDP) specified in this standard allows stations
attached to an IEEE 802 LAN to advertise, to other stations attached to the same IEEE
802 LAN, the major capabilities provided by the system incorporating that station, the
management address or addresses of the entity or entities that provide management of
those capabilities, and the identification of the stations point of attachment to the IEEE
802 LAN required by those management entity or entities. The information distributed via
this protocol is stored by its recipients in a standard Management Information Base (MIB),
making it possible for the information to be accessed by a Network Management System
(NMS) using a management protocol such as the Simple Network Management Protocol
(SNMP).
LLDP-MED
LLDP-MED is an extendsion of IEEE 802.1ab and is defined by the telecommunication
industry association (TIA-1057).
LOC
LOC is an acronym for Loss Of Connectivity and is detected by a MEP and is indicating
lost connectivity in the network. Can be used as a switch criteria by EPS
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MAC Table
Switching of frames is based upon the DMAC address contained in the frame. The switch
builds up a table that maps MAC addresses to switch ports for knowing which ports the
frames should go to ( based upon the DMAC address in the frame ). This table contains
both static and dynamic entries. The static entries are configured by the network
administrator if the administrator wants to do a fixed mapping between the DMAC
address and switch ports.
The frames also contain a MAC address ( SMAC address ), which shows the MAC
address of the equipment sending the frame. The SMAC address is used by the switch to
automatically update the MAC table with these dynamic MAC addresses. Dynamic entries
are removed from the MAC table if no frame with the corresponding SMAC address have
been seen after a configurable age time.
MEP
MEP is an acronym for Maintenance Entity Endpoint and is an endpoint in a Maintenance
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