Table Of Contents

GLOSSARY

The following glossary of acronyms expands acronyms and initialisms that are used in Cisco IOS System Messages, Release 12.2 SR.

Numerals
	10GE	10 Gigabit Ethernet
A
	AAA	authentication, authorization, and accounting
	AAL5	ATM adaptation layer 5
	ABM	asynchronous balanced mode
	ABR	Area Border Router
	AC	alternating current
	ACE	Allegro Crypto Engine
	ACIP	ATM Cable Interface Processor
	ACK	acknowledgment
	ACL	access control list
	ACO	alarm cutoff
	ACTLU	activate logical unit
	ACTPU	activate physical unit
	ADSL	asymmetric digital subscriber line
	AFI	Address Family Identifier
	AH	Authentication Header
	AIC	Alarm Interface Controller
	AIM	Advanced Interface Module
	AIM	advanced integration module
	AIP	ATM Interface Processor
	AIS	Alarm indication
	ALC	ATM line card
	ALPS	Airline Product Set
	AMD	Advanced Micro Devices
	ANR	Automatic Network Routing
	ANSI	American National Standards Institute
	ANY-PHY	Any physical layer-data link layer
	AP	access point
	AP	authentication proxy
	API	application programming interface
	APING	APPC Ping
	APN	access point name
	APPC	Advanced Program-to-Program Communications
	APPN	Advanced Peer-to-Peer Networking
	APS	automatic protection switching
	AQD	average queue depth
	ARAP	AppleTalk Remote Access Protocol
	ARB	Adaptive Rate-Based
	ARP	Address Resolution Protocol
	ARQ	automatic repeat request
	AS	autonomous system
	ASCU	agent-set control unit
	ASIC	application-specific integrated circuit
	ASP	ATM switch processor
	ATA	Advanced Technology Attachment
	ATA	Analog Telephone Adaptor
	ATF	area to free
	ATM	Asynchronous Transfer Mode
	AToM	Any Transport over MPLS
	AURP	AppleTalk Update-Based Routing Protocol
	AutoRP	Auto-Rendezvous Point
	AVL	approved vendor list

B
	BAP	Bandwidth Allocation Protocol
	BB	broadband
	BBI	begin bracket indicator
	BCS	business critical solution
	BERT	bit error rate tester
	BFR	Bigger, Faster Router
	BFRP	big fast route processor
	BGP	Border Gateway Protocol
	BGPPA	Border Gateway Protocol Policy Accounting
	BIC	backplane interface card
	BIDI	bidirectional bus
	BIND	Berkeley Internet Name Domain
	BIP	bit interleaved parity
	BIS	Broadband Interface Shelf
	BLLI	Broadband Low Layer Information
	BMA	Buffer Management ASIC
	BOOM	10BASE-T Ethernet LAN interface card
	BOOTP	Bootstrap Protocol
	BPDU	bridge protocol data unit
	BPI	baseline privacy interface
	BPVC	Bridged Permanent Virtual Circuit
	BR	Undefined
	BRI	Basic Rate Interface
	BRF	Bridge Relay Function
	BSC	Binary Synchronous Communications
	BSS	Business Support System
	BSTUN	Block Serial Tunnel
	BTU	British thermal unit
	BUS	broadcast-and-unknown server

C
	CA	certification authority
	CAIM	Compression Advanced Interface Module
	CAM	content-addressable memory
	CAMR	Cisco Access Metro Router
	CAR	Undefined
	CAS	channel-associated signaling
	CASA	Cisco Appliance and Services Architecture
	CBAC	Context-Based Access Control
	CBC	Cell Bus Controller
	CBI	Cell Bus Interface
	CBus	CiscoBus
	CBWFQ	Class Based Weighted Fair Queueing
	CCA	Common Configuration Architecture
	CCAPI	call control API
	CCB	call control block
	CCB	configuration control block
	CCO	Cisco Connection Online
	CCW	channel command word
	CDI	Common Driver Interface
	CDL	Converged Data Link
	CDM	cable data modem
	CDP	Cisco Discovery Protocol
	CDR	clock and data recovery
	CE	certificate enrollment
	CEB	Common EMS Base
	CEBI	conditional end bracket indicator
	CEF	Cisco Express Forwarding
	CES	circuit emulation service
	CET	Cisco Encryption Technology
	CF	Checkpoint Facility
	CFI	Common Flash Interface
	CGMP	Cisco Group Management Protocol
	CGX	CryptoGraphics eXtensions
	CHAP	Challenge Handshake Authentication Protocol
	cHPI	compact Host Port Interface
	CI	connection identifier
	CICS	Customer Information Control System
	CIP	Channel Interface Processor
	CIR	committed information rate
	CIS	Card Information Services
	CIU	Communication Interface Unit
	CLAW	Common Link Access for Workstations
	CLI	command-line interface
	CLNS	Connectionless Network Service
	CLS	Cisco link services
	CLSI	Cisco link services interface
	CMCC	Cisco Mainframe Channel Connection
	CMNS	Connection Mode Network Service
	CMPC	Cisco Multipath Channel
	CMTS	cable modem termination system
	CNR	Cisco Network Registrar
	CNOS	change number of sessions
	CNS	Cisco Networking Services
	CNSP	Complete Number Sequence PDU
	COAPS	Count of APS switchovers
	codec	coder-decoder
	CoS	class of service
	CoSQ	Class of Service Queues
	COT	continuity testing
	CP	control point
	CP	coprocessor
	CPA	Channel Port Adapter
	CPE	customer premises equipment
	CPI	common part indicator
	CPI-C	common programming interface for communications
	CPK	Undefined
	CPM	Combination Port Module
	CPUIF	Undefined
	CRC	cyclic redundancy check
	CRF	Concentrator Relay Function
	CRL	certificate revocation list
	cRTP	compressed Real-Time Protocol
	CRV	call reference value
	CSA	compression service adapter
	CSAR	Cisco Cell Segmentation and Reassembly
	CSC	clock switch card
	CSG	Content Services Gateway
	CSI	called subscriber identification
	CSM	call switching mode
	CSM	call switching module
	CSNA	Cisco SNA
	CSNP	Complete Sequence Number PDU
	CSU	channel service unit
	CTC	Cisco Transport Controller
	CTL	Certificate Trust List
	CTRC	Cisco Transaction Connection
	CTS	Clear To Send
	CV	Cisco View
	CWAN	Constellation WAN
	CWTLC	Constellation Wan Toaster Line Card
	CyBus	Cisco Extended Bus

D
	DAE	data aggregrator end
	DBus	diagnostic bus
	DC	direct-connect
	DC	direct current
	DCD	data carrier detect
	DCE	data communications equipment
	dCEF	distributed Cisco Express Forwarding
	DDOS	distributed denial of service
	DDR	dial-on-demand routing
	DDSM	Digital Data Services Manager
	DECnet	Digital Equipment Corporation network
	DEMUX	demultiplexer
	DFC	dial feature card
	DFP	Dynamic Feedback Protocol
	DFRAC	Dual Framer and RAC
	DHCP	Dynamic Host Configuration Protocol
	DHCPv6	Dynamic Host Configuration Protocol, version 6
	DIB	Directory Information Base
	DIP-4	4-bit Diagonal Interleaved Parity
	DLC	data-link connection
	DLC	data-link control
	DLCI	data-link connection identifier
	dLFI	Distributed Link Fragmentation and Interleaving
	dLFIoATM	Distributed Link Fragmentation and Interleaving over ATM
	dLFIoFR	Distributed Link Fragmentation and Interleaving over Frame Relay
	DLR	designated local retransmitter
	DLSw	data-link switching
	DLU	dependent logical unit
	DLU	destination logical unit
	DLU	dynamic logical unit
	DLUR	dependent logical unit requester
	DLUS	dependent logical unit server
	DM	dense mode
	DM	disconnect mode
	DMA	direct memory access
	DMAC	destination MAC
	DML	distributed multilink
	DMLP	Distributed Multilink Point-to-Point Protocol
	DNIS	dialed number identification service
	DNS	Domain Name Server
	DNS	Domain Name Service
	DNS	Domain Name System
	DOCSIS	Data-over-Cable Service Interface Specifications
	DOI	domain of interpretation
	DoS	denial of service
	DPRAM	dual-port RAM
	DR	Designated Router
	DR	dynamic replenishment
	DRAM	dynamic RAM
	DRDA	Distributed Relational Database Architecture
	DRiP	Duplicate Ring Protocol
	DRP	Director Response Protocol
	DRQ	Direct memory access Receive Queue
	DS	dial shelf
	DSA	delayed stop accounting
	DSC	dial shelf control
	DSC	dial shelf controller
	DSCP	differentiated service code pointer
	DSI	dial shelf interconnect
	DSI	dial shelf interface
	DSIP	Dial Shelf Interconnect Protocol
	DSL	digital subscriber line
	DSLAM	digital subscriber line ATM multiplexer
	DSMP	Distributed Stream Media Processor
	DSP	digital signal processor
	DSP	Domain Specific Part
	DSP	digital signal processor
	DSPFARM	digital signal processor farm
	DSPM	digital signal processor module
	DSPRM	Digital Signal Processor Resource Manager
	DSPU	downstream physical unit
	DSR	data set ready
	DSU	data service unit
	DSU	digital service unit
	DTE	data terminal equipment
	DTP	Dynamic Trunking Protocol
	DTQ	Direct memory access Receive Queue
	DTR	data terminal ready
	DVMRP	Distance Vector Multicast Routing Protocol

E
	E1T1	E1 line or T1 line
	EADI	Extended Availability Drop and Insert
	EAIM	Encryption AIM
	EAP	Extensible Authentication Protocol
	EAPoUDP	Extensible Authentication Protocol over User Datagram Protocol
	EARL	enhanced address recognition logic
	EC	EtherChannel
	ECA	ESCON Channel Adapter
	ECC	error-correcting code
	ECC	Error-Check Code
	ECC	error checking and correction
	ECM	Extensible Call Model
	ECM	External Control Memory
	EEM	Embedded Event Manager
	EEPROM	electronically erasable programmable read-only memory
	EGP	exterior gateway protocol
	EHSA	enhanced high system availability
	EID	endpoint identifier
	EIGRP	Enhanced Interior Gateway Routing Protocol
	EIO	Elastic I/O
	ELAN	emulated LAN
	ENUM	enumeration
	ENVM	Constellation WAN Environmental Monitor
	EOBC	Ethernet Out-of-Band Channel
	EOC	embedded operations channel
	EOF	end-of-frame
	EOIR	enhanced online insertion and removal
	EoMPLS	Ethernet over MPLS
	EOU	Extensible Authentication Protocol over User Datagram Protocol
	EPM	External Packet Memory
	ESCON	Enterprise System Connection
	ESMP	Even Simpler Management Protocol
	ESP	Extended Services Processor
	ESP	Extended Services Platform
	ESW	Ethernet Switch
	ESWILP	Ethernet Switch with Inline Power
	ESYS	Undefined
	ETM	Enhanced Timing Module
	EXAR	Chip manufacturer

F
	FAQ	frequently asked question
	FB	feature board
	FBB	fast back-to-back
	FBB	from backplane buffer
	FCFS	First Come First Served
	FCIT	Fiber Channel Idle Time
	FC-PFQ	feature card per-flow queueing
	FCPA	Fibre Channel Port Adapter
	FCS	frame check sequence
	FDDI	Fiber Distributed Data Interface
	FDL	Facility Data Link
	FDM	frequency-division multiplexing
	FE	Fast Ethernet
	FEC	Fast EtherChannel
	FECPM	Fast Ethernet Combo Port Module
	FI	format indicator
	FIA	Fabric Interface ASIC
	FIB	forwarding information base
	FIFO	first-in, first-out
	FIR	Finite Impulse Response
	FM	fault monitoring
	FMSP	Fax Media Services Provider
	FPGA	field-programmable gate array
	FPI	Forwarding Path Identifier
	FQDN	fully qualified domain name
	FQPCID	fully qualified procedure correlation identifier
	FREEDM	Frame EnginE and Data link Manager
	FRMR	Frame Reject
	FRoM	FrameRelay over MPLS
	FRoMPLS	FrameRelay over MPLS
	FRR	Fast ReRoute
	FRU	field-replaceable unit
	FSIP	Fast Serial Interface Processor
	FSM	finite state machine
	FTBB	from/to backplane buffer
	FTP	File Transfer Protocol

G
	GBIC	Gigabit Interface Converter
	GC	global configuration
	GDS	general data stream
	GE	Gigabit Ethernet
	GEFC	Gigabit Ethernet/Fibre Channel
	GEIP	Gigabit Ethernet Interface Processor
	GGSN	gateway GPRS support node
	GKTMP	Gatekeeper Transaction Message Protocol
	GLBP	Gateway Load Balancing Protocol
	GLC	gigabit line card
	GP	Global Pointer
	GPRS	general packet radio service
	GRP	gigabit route processor
	GSN	GPRS support node
	GSR	Internet router
	GT95K	Undefined
	GTF	Generalized Trace Facility
	GTP	GPRS tunneling protocol
	GULF	GULF-2488 ASIC

H
	HA	High Availability
	HA	Home Agent
	HAL	Halcyon
	HAPX	Hardware Assisted Packet Classification
	HDLC	High-Level Data Link Control
	HDV	High Density Voice
	HDX	half-duplex
	HEC	header error control
	HERA	Undefined
	HGW	home gateway
	HMAC	hash message authentication codes
	HMS	Home Media Server
	HPI	Host Port Interface
	HPR	High-Performance Routing
	HQF	Hierarchical Queuing Framework
	HSA	high system availability
	HSRP	Hot Standby Router Protocol
	HSSI	High Speed Serial Interface
	HT-FPGA	Hyper Transport Field-Programmable Gate Array
	HWAF	Hardware Address Filtering
	HWIC	High-Speed WAN Interface Card
	HWICD	High-Speed WAN Interface Card, double-wide
	HWIDB	hardware interface descriptor block

I
	I2C	Inter-Integrated Circuit
	IBGP	internal BGP
	IBL	Input Buffer Logic
	IBOC	in-band bit-oriented code
	ICC	Inter Card Communication
	ICC	Interface Controller Card
	ICMP	Internet Control Message Protocol
	ICPIF	Calculated Planning Impairment Factor
	ICS	Integrated Communication System
	IDAP	Internet Data Access Presentation
	IDB	interface descriptor block
	IDPROM	Identification PROM
	IDS	Internal Data Services
	IDT	Integrated Digital Terminal
	IDU	indoor unit
	IE	information element
	IEEE	Institute of Electrical and Electronics Engineers
	IETF	Internet Engineering Task Force
	IF	intermediate frequency
	IGMP	Internet Group Management Protocol
	IGRP	Interior Gateway Routing Protocol
	IIC	Undefined
	IIF	Input interface
	IIH	IS to IS Hello PDU
	IIN	Undefined
	IKE	Internet Key Exchange
	ILMI	Integrated Local Management Interface
	ILP	inline power
	ILPM	inline power module
	IMA	inverse multiplexing over ATM
	IMSI	international mobile subscriber identity
	IOB	Undefined
	IP	Internet Protocol
	IPC	interprocess communication
	IPDC	Internet Protocol device control
	IPDLC	IP data link connection
	IPE	Inter-PRE Ethernet
	IPG	Inter Packet Gap
	IPHC	IP Header Compression
	IPM	Cisco Internetwork Performance Monitor
	IPPCP	IP Payload Compression Protocol
	IPRM	IP Router Manager
	IPS	IP Storage
	IPSec	IP Security
	IPv6	IP version 6
	IPX	Internetwork Packet eXchange
	ISA	Integrated Services Adapter
	ISAKMP	Internet Security Association and Key Management Protocol
	ISDN	Integrated Services Digital Network
	ISE	Internet Services Engine
	IS-IS	Intermediate System-to-Intermediate System
	ISL	Inter-Switch Link
	ISR	intermediate session routing
	ISRHOG	Interrupt Service Routine HOG
	ISSU	In-Service Software Upgrade
	IST	Internal Spanning Tree
	IVR	interactive voice response
	IXP	Internet Exchange Point

L
	L2	Layer 2
	L2F	Layer 2 Forwarding
	LAC	L2TP access concentrator
	LACP	Link Aggregate Control Protocol
	LAIS	SONET Line level Alarm Indication Signal
	LANCE	Local Area Network Controller Ethernet
	LANE	LAN Emulation
	LAPB	Link Access Procedure, Balanced
	LAT	local-area transport
	LC	line card
	LCATM	Label controlled ATM
	LCB	Line Control Block
	LCC	Line card Configuration Coordinator
	LCD	liquid crystal display
	LCDOS	line card operating system software
	LCI	local channel identifier
	LCN	logical channel number
	LDLC	LocalDirector link control
	LDN	local directory number
	LDP	Label Distribution Protocol
	LEC	LANE Client
	LECS	LANE Configuration Server
	LED	light-emitting diode
	LEN	low-entry networking
	LES	LANE Server
	LFD	Label Forwarding Database
	LFSID	local-form session identifier
	LIR	link incident report
	LIU	line interface unit
	LLC	logical link control
	LLC2	Logical Link Control, type 2
	LLD	low level design
	LMI	Local Management Interface
	LNM	LAN Network Manager
	LNS	L2TP network server
	LOF	Loss of Frame
	LOS	Loss of Signal