Extreme Networks ExtremeWare XOS 11.3, Руководство пользователя

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Glossary
ExtremeWare XOS 11.3 Concepts Guide
656
link aggregation Link aggregation, also known as trunking or load sharing, conforms to
IEEE 802.3ad. This feature is the grouping of multiple network links
into one logical high-bandwidth link.
link type In OSPF, there are four link types that you can configure: auto,
broadcast, point-to-point, and passive.
LLDP Link Layer Discovery Protocol. LLDP conforms to IEEE 802.1ab and is
a neighbor discovery protocol. Each LLDP-enabled device transmits
information to its neighbors, including chassis and port identification,
system name and description, VLAN names, and other selected
networking information. The protocol also specifies timing intervals in
order to ensure current information is being transmitted and received.
load sharing Load sharing, also known as trunking or link aggregation, conforms to
IEEE 802.3ad. This feature is the grouping of multiple network links
into one logical high-bandwidth link. For example, by grouping four
100 Mbps of full-duplex bandwidth into one logical link, you can
create up to 800 Mbps of bandwidth. Thus, you increase bandwidth
and availability by using a group of ports to carry traffic in parallel
between switches.
LFS Link Fault Signal. LFS, which conforms to IEEE standard 802.3ae-2002,
monitors 10 Gbps ports and indicates either remote faults or local
faults.
loop detection In ELRP, loop detection is the process used to detect a loop in the
network. The switch sending the DLRP PDU waits to receive its
original PDU back. If the switch received this original PDU, there is a
loop in the network.
LSA Link state advertisement. An LSA is a broadcast packet used by link
state protocols, such as OSPF. The LSA contains information about
neighbors and path costs and is used by the receiving router to
maintain a routing table.
LSDB Link state database. In OSPF, LSDB is a database of information about
the link state of the network. Two neighboring routers consider
themselves to be adjacent only if their LSDBs are synchronized. All
routing information is exchanged only between adjacent routers.
M
MAC address Media access control address. The MAC address, sometimes known as
the hardware address, is the unique physical address of each network
interface card on each device.
MAN Metropolitan area network. A MAN is a data network designed for a
town or city. MANs may be operated by one organization such as a
corporation with several offices in one city, or be shared resources
used by several organizations with several locations in the same city.
MANs are usually characterized by very high-speed connections.
L (Continued)