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Glossary

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IEEE 802.3

The IEEE committee specification that defines the Ethernet

group, specifically the original 10Mbps standard. Ethernet is a LAN pro-
tocol that specifies physical layer and MAC sublayer media access. IEEE
802.3 uses CSMA/CD to provide access for many devices on the same net-
work. Fast Ethernet is defined as 802.3U, and Gigabit Ethernet is defined as
802.3Q. See also: CSMA/CD.

IEEE 802.5

IEEE committee that defines Token Ring media access.

IGMP

Internet Group Management Protocol: Employed by IP hosts, the

protocol that reports their multicast group memberships to an adjacent
multicast router.

IGP

interior gateway protocol: Any protocol used by the Internet to

exchange routing data within an independent system. Examples include RIP,
IGRP, and OSPF.

IGRP

Interior Gateway Routing Protocol: Cisco proprietary distance

vector routing algorithm. Upgrade from the RIP protocol.

ILMI

Integrated (or Interim) Local Management Interface. A specification

created by the ATM Forum, designated for the incorporation of network-
management capability into the ATM UNI. Integrated Local Management
Interface cells provide for automatic configuration between ATM systems.
In LAN emulation, ILMI can provide sufficient information for the ATM
end station to find an LECS. In addition, ILMI provides the ATM NSAP
(Network Service Access Point) prefix information to the end station.

in-band management

In-band management is the management of a net-

work device "through" the network. Examples include using Simple Network
Management Protocol (SNMP) or Telnet directly via the local LAN. Com-
pare with: out-of-band management.

in-band signaling

Configuration of a router from within the network.

Examples are Telnet, Simple Network Management Protocol (SNMP), or a
Network Management Station (NMS).

insured burst

In an ATM network, it is the largest, temporarily permitted

data burst exceeding the insured rate on a PVC and not tagged by the traffic
policing function for being dropped if network congestion occurs. This
insured burst is designated in bytes or cells.

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