Cisco IOS Release 12.2SX System Message Guide
Glossary of Acronyms
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GLOSSARY

Table Of Contents


GLOSSARY

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


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 Adapter
 
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 or Adelson-Velskii and Landis


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
 
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
 
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
 
CPM
Combination Port Module
 
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
 
EFC
extended flow control
 
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
 
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
 
FO1
fragment offset == 1
 
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
 
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
 
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
 
IDB
interface descriptor block
 
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
 
IIF
Input interface
 
IIH
IS to IS Hello PDU
 
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
 
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
 
LPD
line printer daemon
 
LRC
line card redundancy controller
 
LRJ
location rejection
 
LRQ
location request
 
LS
LightStream
 
LSA
link-state advertisement
 
LSD
label switching database
 
LSIPC
LightStream interprocess communication
 
LSP
label switch path
 
LSP
link-state packet
 
LSP
Link-State PDU
 
LSS
LightStream switching
 
LTL
local target logic
 
LU
logical unit
 
LU6.2
logical unit type 6.2
 
LVC
label switched controlled virtual circuits
 
LYRA
Constellation+ Advanced Forwarding Engine Layer2


M
   
 
MAC
Media Access Control
 
MAR
Midrange Access Routers
 
MARS
Multicast Address Resolution Server
 
MATM
MAC Address Table Manager
 
MAU
media attachment unit
 
MAX
maximum
 
MBE
multiple-bit error
 
MBRI
Multi-BRI
 
MBRI
Multiport Basic Rate Interface
 
MBus
maintenance bus
 
MCNS
Multimedia Cable Network System Partners, Ltd.
 
MCOM
Microcom carrier card
 
MCDMA
Multi-Channel DMA
 
MCSC
Multi-Channel Serial Controller
 
MD5
message digest 5
 
MDB
Multicast Descriptor Block
 
MDL
maintenance data link
 
MDRR
Modified Deficit Round Robin
 
MDS
multicast distributed switching
 
MDSS
Multicast Distributed Shortcut Switching
 
MDT
multicast distribution tree
 
MEMD
memory device
 
MFD
Multicast Fast Drop
 
MFE
Multi-port Fast Ethernet
 
MFI
MPLS forwarding infrastructure
 
MFIB
Multicast Forwarding Information Base
 
MGCP
Media Gateway Control Protocol
 
MIB
Management Information Base
 
MIB/SMT
Management Information Base/Station Management
 
MIC
media interface connector
 
MICA
Modem ISDN channel aggregation
 
MID
Multiplex ID
 
MIDB
multicast interface data block
 
MII
media-independent interface
 
MLD
Multicast Listener Discovery
 
MLP
Multilink Point-to-Point Protocol
 
MLPPP
Multilink Point-to-Point Protocol
 
MLS
multilayer switching
 
MLSM
multilayer switching for multicast
 
MLTG
multilink trunk group
 
MMAP
memory map
 
MMI
Modem Management Interface
 
MMLS
multicast multilayer switching
 
MNCNS
Multimedia Cable Network System Partners, Ltd.
 
MNP4
Microcom Networking Protocol 4
 
MP
Multilink Protocol
 
MPC
MultiPath Channel
 
MPC
Multiprotocol-over-ATM client
 
MPLS
Multiprotocol Label Switching
 
MPOA
Multiprotocol over ATM
 
MPPE
Microsoft Point to Point Encryption
 
MPS
Multiprotocol-over-ATM server
 
MQC
Modular Quality of Service (QoS) command line interface (CLI)
 
MRIB
Multicast Routing Information Base
 
MRP
Multiservice Routing Processor
 
MPT
Ministry of Posts and Telecommunications
 
mroute
Multicast route
 
MS
Management Services
 
MS
mobile subscriber
 
MSC
Modular Services Card
 
MSDP
Multicast Source Discovery Protocol
 
MSFC
Multilayer Switch Feature Card
 
MSP
Media Service Provider
 
MSR
Multiservice Switch Router
 
MSS
maximum segment size
 
MST
Multiple Spanning-Tree Protocol
 
MSTOO
multiple spanning tree root
 
Mtree
matings tree
 
MTU
maximum transmission unit
 
MURIB
Multicast Unicast Routing Information Base
 
mutex
mutual exclusivity lock
 
MVIP
Versatile Interface Processor
 
MWAM
Multi-Processor WAN Application Module
 
Mx
Mueslix


N
   
 
NAK
negative acknowledgment
 
NAM
Network Analysis Module
 
NAS
network access server
 
NAT
Network Address Translation
 
NBAR
network-based application recognition
 
NBP
Name Binding Protocol
 
NCE
network connection endpoint
 
NCP
Network Control Program
 
NCP
Network Control Protocol
 
NEAT
E1 and T1 processor
 
NFAS
Non Facility Associated Signaling
 
NHDR
Network Layer Header
 
NHRP
Next Hop Resolution Protocol
 
NHS
Next Hop Server
 
NIM
network interface module
 
NIP
Nitro Interconnect Protocol
 
NLP
network-layer packet
 
NLSP
NetWare Link Services Protocol
 
NM
network module
 
NM-HD
high density network module
 
NME
Network Management Ethernet
 
NMI
nonmaskable interrupt
 
NMP
Network Management Processor
 
NMS
network management system
 
NMVT
network management vector transport
 
NNI
Network-to-Network Interface
 
NNS
network node server
 
NPE
network processing engine
 
NRM
normal response mode
 
NRP
Network Routing Processor
 
NRP
node route processor
 
NSAP
network service access point
 
NSDB
Network Security Database
 
NSE
network services engine
 
NSF
Non-stop forwarding
 
NSP
Network Switch Processor
 
NSP
node switch processor
 
NTP
Network Time Protocol
 
NVRAM
nonvolatile RAM


O
   
 
OAM
Operation, Administration, and Maintenance
 
OBL
Output Buffer Logic
 
OC
Optical Carrier
 
OCE
output chain elements
 
ODU
outdoor unit
 
OER
Optimized Edge Routing
 
OFC
open fiber control
 
OIF
Output interface
 
OIR
online insertion and removal
 
ONS
Optical Networking Systems
 
OOBP
out-of-band port
 
OOD
Online Offline Diagnostics
 
OOS
out of service
 
ORF
outbound route filter
 
OSCP
Optical Supervisory Channel Protocol
 
OSM
Optical Services Module
 
OSP
Open Settlements Protocol
 
OSPF
Open Shortest Path First
 
OSS
Operations Support System
 
OU
organizational unit


P
   
 
PA
port adapter
 
PAD
packet assembler/disassembler
 
PAgP
Port Aggregation Protocol
 
PAM
port adapter module card
 
PAM
pulse amplitude modulation
 
PAN
4-Port and (8+1) Port ESWILP HWIC
 
PAP
Password Authentication Protocol
 
PASCB
port adapter system control block
 
PASV
passive mode FTP
 
PBP
packet-by-packet
 
PC
program counter
 
PCA
Parallel Channel Adapter
 
PCF
Packet Control Function
 
PCF
Profile Configuration File
 
PCI
protocol control information
 
PCID
procedure correlation identifier
 
PCM
pulse code modulation
 
PCMCIA
Personal Computer Memory Card International Association
 
PCR
peak cell rate
 
PDP
policy decision point
 
PDSN
Packet Data Serving Node
 
PDU
protocol data unit
 
PEMF
Power Entry Module and Filter
 
PF
protocol filtering
 
PGM
Pragmatic General Multicast
 
PHAD
Physical Layer Interface Module (PLIM) header add-drop ASIC
 
PHY
physical layer interface
 
PIC
Peripheral Interface Controller
 
PIC
point in call
 
PIE
protocol information element
 
PIF
Packet Input FIFO
 
PIM
Protocol Independent Multicast
 
PIM-SM
Protocol Independent Multicast Sparse Mode
 
PIMv2
Protocol Independent Multicast version 2
 
PIU
PCM Interface Unit
 
PKCS
Public Key Cryptographic Standards
 
PKI
public key infrastructure
 
PLD
programmable logic device
 
PLIM
Physical Layer Interface Module
 
PLU
primary logical unit
 
PLX
PCI to local bus bridge vendor
 
PM
port management
 
PMA
Packet Memory Access
 
PMB
power management bus
 
PMC
PCI Mezzanine Card
 
PMON
Performance Monitor
 
PNNI
Private Network-Network Interface
 
PNSP
Partial Number Sequence PDUs
 
POE
Power Over Ethernet
 
PoS
Packet over SONET
 
PoS
Packet over SONET/SDH
 
POST
power-on self test
 
POT1E1
Packet Over T1 E1
 
POTS
plain old telephone service
 
PPC
primary point code
 
PPP
Point-to-Point Protocol
 
PQUICC
Quad Integrated Communications Controller
 
PRBS
Pseudo-Random Bit Sequence
 
PRE
Performance Routing Engine
 
PRI
Primary Rate Interface
 
PROM
programmable read-only memory
 
PRP
Performance Route Processor
 
PSA
Packet Switching ASIC
 
PSC
processor and switch card
 
PSM
Protection Switch Module
 
PSNP
Partial Sequence Number PDU
 
PTB
Peer Transaction Bus
 
PU
physical unit
 
PU 2.0
Physical Unit type 2.0
 
PU 2.1
Physical Unit type 2.1
 
PVC
permanent virtual circuit
 
PVC
permanent virtual connection
 
PVDM
Packet Voice DSP Module
 
PVID
Port VLAN ID
 
PVP
permanent virtual path
 
PVST+
Per-VLAN Spanning Tree
 
PXF
Parallel eXpress Forwarding
 
PXM
Processor Switching Module


Q
   
 
QA
queue and accumulator
 
QEM
QEM driver
 
QLLC
Qualified Logical Link Control
 
QM
QoS manager
 
QMAC
Quad Token Ring Media Access Controller ASIC
 
QoS
quality of service


R
   
 
RA
registration authority
 
RAC
Resource Availability Confirm
 
RAC
Ring Access Controller
 
RADIUS
Remote Authentication Dial-In User Service
 
RARP
Reverse Address Resolution Protocol
 
RAS
Registration, Admission, and Status
 
RAS
remote access server
 
RBCP
Router Blade Configuration Protocol
 
RBD
receive buffer descriptor
 
RBS
Robbed-Bit Signaling
 
RCP
remote copy protocol
 
RDB
relational database
 
RED
redundancy
 
REQACTPU
request to activate a physical unit
 
REQDACTPU
request to deactivate a physical unit
 
REQ(D)ACTPU
(RSP)
Route Switch Processor request to activate or deactivate a physical unit
 
REXEC
remote execution
 
RF
radio frequency
 
RF
Redundancy frequency
 
RIB

Routing Information Base

 
RIP
Routing Information Protocol
 
RISC
reduced instruction set computing
 
RJE
remote job entry
 
RLM
Redundant Link Manager
 
RMON
Remote Network Monitoring
 
RNR
receive not ready
 
ROM
read-only memory
 
RP
Route Processor
 
RPA
Resource Pool Allocation
 
RPC
Remote Procedure Call
 
RPF
Reverse Path Forwarding
 
RPM
Route Processor Module
 
RPM
Resource Pool Management
 
RPMXF
Route Processor Module, express forwarding
 
RPR
Route Processor Redundancy
 
RPR+
Route Processor Redundancy plus
 
RPS
Ring Parameter Server
 
RR
receive ready
 
RRP
Redundant Route Processor
 
RS
router shelf
 
RS-232
EIA/TIA-232
 
RSA
Rivest, Shamir, and Adelman (a public-key cryptographic system)
 
RSC
route switch controller
 
RSCPB
RSC front panel push button
 
RSCV
Route Selection Control Vector
 
rsh
remote shell
 
RSL
remote switch link
 
RSM
Route Switch Module
 
RSP
Route Switch Processor
 
RSPAN
Remote Switched Port Analyzer
 
RSRB
remote source-route bridging
 
RSRC
Resource
 
RSVP
Resource Reservation Protocol
 
RTAL
Receive Telecombus Aligner/Interface
 
RTC
real-time console
 
RTM
Real Time Monitor
 
RTP
Rapid Transport Protocol
 
RTP
Real-Time Transport Protocol
 
RTR
response time reporter
 
RTS
Request To Send
 
RTT
round-trip time
 
RTTMON
Round Trip Time Monitor
 
RU
request/response unit
 
RUDP
Reliable User Data Protocol
 
Rx
Receive
 
RXP
Resonate Exchange Protocol


S
   
 
SA
security association
 
SA
Source-Active
 
SA
Service Assurance
 
SADB
security association database
 
SAF24
SAR adapter FPGA OC24
 
SAFI
Subsequent Address Family Identifier
 
SAP
service access point
 
SAR
segmentation and reassembly
 
SBE
single-bit error
 
SCB
storage control blocks
 
SCB
system control board
 
SCC
Signaling Connection Control
 
SCCP
Signaling Connection Control Part
 
SCM
Service Connection Manager
 
SCP
Service Control Point
 
SCP
Switch-Module Configuration Protocol
 
SCP
System Control Protocol
 
SCR
sustained cell rate
 
SDCC
Serial Data Communication Channel
 
SDEE
Security Device Event Exchange
 
SDF
Signature Definition File
 
SDLC
Synchronous Data Link Control
 
SDLLC
Synchronous Data Logical Link Control
 
SDM
Security Device Manager
 
SDP
Session Description Protocol
 
SDP
Shelf Discovery Protocol
 
SDRAM
synchronous DRAM
 
SDT
Start Data Transfer
 
SEF
severely errored frames
 
SERDES
Serializer-Deserializer
 
SFC
switch fabric card
 
SFP
Small Form Factor Pluggable
 
SGBP
Stack Group Bidding Protocol
 
SGCP
Simple Gateway Control Protocol
 
SGSN
Serving GPRS Support Node
 
SID
Service ID
 
SIMM
single in-line memory module
 
SIP
Session Initiation Protocol
 
SLARP
Serial Line Address Resolution Protocol
 
SLB
Server Load Balancing
 
SLC
signaling link code
 
SLCI
Signaling Link Code Interface
 
SLIC
Subscriber Line Interface Circuit
 
SLIP
Serial Line Internet Protocol
 
SLU
secondary logical unit
 
SM
sparse mode
 
SM
state machine
 
SMbus
System Management bus
 
SMDS
Switched Multimegabit Data Service
 
SME
Signature Micro Engine
 
SMRP
Simple Multicast Routing Protocol
 
SMTP
Simple Mail Transfer Protocol
 
SNA
Systems Network Architecture
 
SNASw
SNA Switching Services
 
SNMP
Simple Network Management Protocol
 
SNR
signal-to-noise ratio
 
SNRM
Set Normal Response
 
SO-DIMM
Small Outline Dual In-line Memory Modules
 
SOF
start-of-frame
 
SOP
Second-Generation Packet-over-SONET
 
SP
Switch Processor
 
SPA
Shared Port Adapter
 
SPACP
SPA bus communications protocol
 
SPAN
Switched Port Analyzer
 
SPD
Security Policy Database
 
SPE
service processing element
 
SPI
security parameter index
 
SPI4
System Packet Interface Level 4
 
SPID
service profile identifier
 
SPM
source path message
 
SPMM
SIMM DSP module
 
SRA
source routing accelerator
 
SRAM
static RAM
 
SRC
Switch Redundancy Controller
 
SRCP
Simple Resource Coordination Protocol
 
SRDB
source route relational database
 
SRIC
Sculptor Input Controller
 
SRIF
Sculptor Interface
 
SROC
Sculptor Output Controller
 
SRP
Server Redundancy Protocol
 
SRP
Spatial Reuse Protocol
 
SRR
Single Ring Recovery Protocol
 
SSA
Serial Storage Architecture
 
SSCOP
Service-Specific Connection-Oriented Protocol
 
SSCP
system services control points
 
SSE
silicon switching engine
 
SSG
Service Selection Gateway
 
SSH
Secure Shell
 
SSL
Secure Socket Layer
 
SSM
Single State Mode
 
SSM
Source Specific Multicast
 
SSO
Stateful SwitchOver
 
SSP
Silicon Switch Processor
 
SSP
state synchronization protocol
 
SSRAM
synchronous static RAM
 
SSRP
Simple Server Redundancy Protocol
 
SSS
Subscriber Service Switching
 
SSTP
Shared Spanning-Tree Protocol
 
STP
Spanning-Tree Protocol
 
STUN
serial tunnel
 
SU
service unit
 
SU
signaling unit
 
SVC
switched virtual circuit
 
SVI
switched virtual interface
 
SVIP
Versatile Interface Processor 2
 
SW56
switched 56K
 
SWIDB
software for Interface Descriptor Block
 
SYSMGT
system management


T
   
 
TAC
Cisco Technical Assistance Center
 
TACACS
Terminal Access Controller Access Control System
 
TBB
to backplane buffer
 
TBI
Ten Bit Interface
 
TBM
Transmit Buffer Manager
 
TCA
telecommunications access method
 
TCATM
Tag Control ATM
 
TCAM
Ternary Content Addressable Memory
 
TCB
Transmission Control Block
 
TCL
Toolkit Command Language
 
TCP
Transmission Control Protocol
 
TDM
time-division multiplexing
 
TDP
Tag Distribution Protocol
 
TDR
time domain reflectometer
 
TE
terminal equipment
 
TE
traffic engineering
 
TE
tunnel equipment
 
TE3
T3 or E3
 
TED
Tunnel Endpoint Discovery
 
TEI
terminal endpoint identifier
 
TFIB
Tag Forwarding Information Base
 
TFTP
Trivial File Transfer Protocol
 
TG
transmission group
 
TIB
Tag Information Base
 
TIM
Tree Information Base
 
TIC
Toaster Input Controller
 
TID
Terminal Identifier
 
TIFF
tagged image file format
 
TLB
translation look-aside buffer
 
TLV
type, length, value
 
TMQ
terminal port queueing
 
ToS
Type of Service
 
TP
Transport Protocol
 
TR
Token Ring
 
TRANGE
time-range
 
TSC
Tag Switch Controller
 
TSCAM
Traffic Shaping Carrier Access Module
 
TSI
transmitting subscriber information
 
TSP
tag-switched path
 
TT2RP
Toaster-to-RP
 
TTAL
Transmit Telecombus Aligner/Interface
 
TTL
time to live
 
TVC
tag switched controlled virtual circuit
 
TVC
tag virtual circuits
 
Tx
transmit


U
   
 
UA
unnumbered acknowledgement
 
UART
Universal Asynchronous Receiver/Transmitter
 
UCB
University of California, Berkeley
 
Ucode
Microcode
 
UDLD
UniDirectional Link Detection
 
UDP
User Datagram Protocol
 
UPS
uninterruptible power supply
 
URM
Universal Router Module
 
uRPF
Unicast Reverse Path Forwarding


V
   
 
VACL
VLAN access control list
 
VAD
voice activity detection
 
VBR
variable bit rate
 
VBR-nRT
variable bit rateā€”non-real time
 
VC
virtual circuit
 
VCC
virtual channel connection
 
VCD
virtual circuit descriptor
 
VCCI
Virtual Channel Common Index
 
VCHAN
virtual channel
 
VCI
virtual channel identifier [ ATM only]
 
VCN
virtual circuit number
 
VFC
voice feature card
 
VFC
VoIP feature card
 
VFR
Virtual Fragment Reassembly
 
VG
voice gateway
 
VIC
voice interface card
 
VIP
Versatile Interface Processor
 
VLAN
virtual LAN
 
VMAC
Virtual MAC
 
VMPS
VLAN Membership Policy Server
 
VMR
value, mask, result
 
VNM
Voice Network Manager
 
VOA
variable optical attenuator
 
VoIP
Voice over IP
 
VP
virtual path
 
VPC
virtual path connection
 
VPD
voice packet driver
 
VPDN
Virtual Private Dialup Network
 
VPI
virtual path identifier
 
VPLS
Virtual Private LAN Service
 
VPN
Virtual Private Network
 
VPNv4
Virtual Private Network version 4
 
VQP
VLAN Query Protocol
 
VQPC
VQP client
 
VRF
VPN Routing and Forwarding
 
VRRP
Virtual Router Redundancy Protocol
 
VSI
Virtual Switch Interface
 
VSM
Voice Service Manager
 
VT
virtual terminal
 
VTAM
virtual telecommunications access method
 
VTMS
Versatile Traffic Management and Shaping
 
VTP
VLAN Trunk Protocol
 
VTSP
voice telephony service provider
 
VTT
voltage termination
 
VWIC
Voice/WAN interface card


W
   
 
WCCP
Web Cache Communication Protocol
 
WCS
writable control store
 
WDS
Wireless Domain Services
 
WIC
WAN interface card
 
WLM
Workload Manager
 
WRED
Weighted Random Early Detection
 
WWW
World Wide Web


X
   
 
XCA
external communication adapter
 
XCVR
transceiver
 
XDR
eXternal Data Representation
 
XID
exchange identification
 
XML
eXtensible Markup Language
 
XNS
Xerox Network Systems
 
XOT
X.25-over-TCP
 
XTagATM
extended tag ATM


Z
   
 
ZBT
zero bus turnaround