Setup guide

Glossary
GL-6
Cisco 6400 Software Setup Guide
OL-1183-04
I
ICD International Code Designator. One of two ATM address formats developed by the ATM Forum for use
by private networks. Adapted from the subnetwork model of addressing in which the ATM layer is
responsible for mapping network layer addresses to ATM addresses. Compare with DCC.
ICMP
Internet Control Message Protocol. Network layer Internet protocol that reports errors and provides
other information relevant to IP packet processing. Documented in RFC 792.
IDI initial domain identifier. Portion of an NSAP or NSAP-format ATM address that specifies the address
allocation and administration authority. See also NSAP.
IETF Internet Engineering Task Force. Task force consisting of over 80 working groups responsible for
developing Internet standards. The IETF operates under the auspices of ISOC. See also ISOC.
IFS
integrated file system, such as PCMCIA disks, TFTP, FTP, or rcp servers.
IISP Interim Interswitch Signaling Protocol. Formerly known as PNNI Phase 0, IISP is an ATM signaling
protocol for interswitch communication by means of manually configured prefix tables. In the
Cisco6400, the software image can be configured to use IISP (C6400-WI-M) or PNNI (C6400-WP-M)
for signaling connections.
ILEC Incumbent Local Exchange Carrier. The traditional local telephone service provider in the United
States.
ILMI
Interim Local Management Interface. ATM specification for incorporating network-management
capabilities into the ATM UNI.
I/O input/output.
IOS See Cisco IOS.
IP
Internet Protocol. Network layer protocol in the TCP/IP stack offering a connectionless internetwork
service. IP provides features for addressing, type-of-service specification, fragmentation and
reassembly, and security. Documented in RFC 791.
IP over ATM Suite used to send IP datagram packets between nodes on the Internet.
IPCP IP Control Protocol. Protocol that establishes and configures IP over PPP.
IRB
integrated routing and bridging. The process of routing between a number of bridge-groups.
ISOC Internet Society. International nonprofit organization, founded in 1992, that coordinates the evolution
and use of the Internet. In addition, ISOC delegates authority to other groups related to the Internet,
such as the IAB. ISOC is headquartered in Reston, Virginia (United States).
ITT Input Translation Table. Data structure used in MMC chipsets for the Cisco 6400 NSP.
ITU-T
International Telecommunications Union Telecommunication Standardization Sector. International
body that develops worldwide standards for telecommunications technologies. The ITU-T carries out
the functions of the former CCITT.