Owner's Manual

Appendix E. Glossary | 933
NETGEAR 8800 User Manual
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 ELRP 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.
master router In VRRP, the master router is the physical device (router) in the VRRP virtual
router that is responsible for forwarding packets sent to the VRRP virtual router
and for responding to ARP requests. The master router sends out periodic
advertisements that let backup routers on the network know that it is alive. If the
VRRP IP address owner is identified, it always becomes the master router.
MED Multiple exit discriminator. BGP uses the MED metric to select a particular
border router in another AS when multiple border routers exist.
MEP In CFM, maintenance end point is and end point for a single domain, or
maintenance association. The MEP may be either an UP MEP or a DOWN MEP.
metering In QoS, metering monitors the traffic pattern of each flow against the traffic
profile. For out-of-profile traffic the metering function interacts with other
components to either re-mark or drop the traffic for that flow. In the NETGEAR
implementation, you use ACLs to enforce metering.
L (Continued)