User manual

Publication date: Feb., 2013
Revision A3
269
remain unused. There is a rather substantial movement to adopt a new version of the Internet
Protocol, IPv6, which would have 128-bits Internet Protocol addresses. This number can be
represented roughly by a three with thirty-nine zeroes after it. However, IPv4 is still the
protocol of choice for most of the Internet.
IPMC
IPMC is an acronym for IP MultiCast.
IP Source Guard
IP Source Guard is a secure feature used to restrict IP traffic on DHCP snooping untrusted
ports by filtering traffic based on the DHCP Snooping Table or manually configured IP Source
Bindings. It helps prevent IP spoofing attacks when a host tries to spoof and use the IP
address of another host.
L
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 extension 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
M
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