Glossary

L
Last Hop Router
(LHR)
The last router in the multicast path that is directly connected to the multicast receiver.
Link Aggregation
(LA)
A method of grouping multiple physical interfaces into a single logical interface.
Link Aggregation
Control Protocol
(LACP)
A protocol that exchanges information between two systems and automatically establishes a link
aggregation group (LAG) between them.
Link Layer
Discovery
Protocol —
Media Endpoint
Discovery (LLDP-
MED)
A protocol that enables endpoint devices and network connected devices to advertise their
characteristics and configuration information.
Link Layer
Discovery
Protocol (LLDP)
A protocol that enables a local area network (LAN) device to advertise its configuration and receive
configuration information from adjacent LLDP-enabled infrastructure devices.
Link-State
Advertisements
(LSA)
The fundamental building blocks of OSPF that communicate the routing topology of the router to all other
routers in the network.
LLDP Data Unit
(LLDPDU)
A sequence of type-length-value (TLV) structures. LLDP information is sent from each of the configured
interfaces at a fixed interval in the form of an Ethernet frame that contains one LLDPDU.
M
Mac-flush-timer
A MAC flush parameter that defines the time used to flush the MAC address entries.
Martian
addresses
Special IPv4 and IPv6 addresses that are not routed by routing devices on the Internet.
Max-age A global parameter that defines the length of time a switch maintains configuration information before it
refreshes that information by recomputing the MST topology.
Max-hops A parameter that defines the maximum number of hops a BPDU travels before a receiving device discards
it.
Media Access
Control (MAC)
A L2 protocol that determines how data is transmitted between devices within a broadcast domain.
MLD snooping An IPv6 L2 multicast protocol that enables switches to use the information in MLD packets and generate
a forwarding table that associates ports with multicast groups. When switches receive multicast frames,
they forward them to their intended receivers.
Multicast A communication method that allows networking devices to send data to a group of interested receivers
in a single transmission, in contrast to unicast and broadcast.
Multicast
Listener
Discovery (MLD)
A protocol that the IPv6 router uses to discover listeners for a specific multicast group, and to set up and
maintain multicast group memberships.
Multicast
Listener
Discovery
Protocol
A protocol that helps to manage the multicast groups. OS10 supports MLDv1and MLDv2 to manage the
multicast group memberships on IPv6 networks.
Multicast router A Layer 3 (L3) router or switch that has multicast features enabled.
Multiple
Spanning-Tree
(MST)
A protocol that allows mapping of MST instances and multiple VLAN networks to a single spanning-tree
instance.
Glossary of Terms 9