Internet Assigned Numbers Authority. Regulatory group that maintains all assigned and registered Internet numbers , such as IP and multicast addresses.
See also [NIC]
IBGP
Internal BGP. BGP configuration in which sessions are established between routers in the same ASs.
ICMP
Internet Control Message Protocol. Used in router discovery, ICMP allows router advertisements that enable a host to discover addresses of operating routers on the subnet.
IDE
Integrated Drive Electronics. Type of hard disk on the Routing Engine.
IEC
International Electrotechnical Commission.
See also [ISO]
IEEE
Institute of Electronic and Electrical Engineers. International professional society for electrical engineers .
IETF
Internet Engineering Task Force. International community of network designers, operators, vendors , and researchers concerned with the evolution of the Internet architecture and the smooth operation of the Internet.
IGMP
Internet Group Membership Protocol. Used with multicast protocols to determine whether group members are present.
IGP
Interior gateway protocol, such as IS-IS, OSPF, and RIP.
import
To install routes from the routing protocols into a routing table.
ingress router
In MPLS, first router in a label-switched path (LSP).
See also [egress router]
inter-AS routing
Routing of packets among different ASs.
See also [EBGP]
intercluster reflection
In a BGP route reflection, the redistribution of routing information by a route reflector system to all nonclient peers (BGP peers not in the cluster).
See also [route reflection]
interface routes
Routes that are in the routing table because an interface has been configured with an IP address. Also called direct routes.
intermediate system
In IS-IS, network entity that sends and receives packets and that can also route packets.
internal BGP
See [IBGP]
intra-AS routing
The routing of packets within a single AS.
See also [IBGP]
IP
Internet Protocol. The protocol used for sending data from one point to another on the Internet.
IS-IS
Intermediate System-to-Intermediate System protocol. Link-state, interior gateway routing protocol for IP networks that also uses the shortest-path first (SPF) algorithm to determine routes.
ISO
International Organization for Standardization. Worldwide federation of standards bodies that promotes international standardization and publishes international agreements as International Standards.
ISP
Internet service provider. Company that provides access to the Internet and related services.
ITU
International Telecommunications Union (formerly known as the CCITT). Group supported by the United Nations that makes recommendations and coordinates the development of telecommunications standards for the entire world.
