Abbreviations

AAA	Authorization, Authentication and Accounting
AAL	ATM Adaption Layer
ABR	Area Border Router
ABR	Available Bit Rate
AES	Advanced Encryption Standard
AH	Authentication Headers
APS	Automatic Protection Switching
ARP	Address Resolution Protocol
AS	Autonomous System
ASIC	Application Specific Integrated Circuit
ASM	Any Source Multicast
ATM	Asynchronous Transfer Mode
BA	Behaviour Aggregate
BECN	Backward Explicit Congestion Notification
BFWA	Broadband Fixed Wireless Access
BGP	Border Gateway Protocol
BSR	Bootstrap Router
CA	Certificate Authority
CBR	Constant Bit Rate
C-BSR	Candidate Bootstrap Router
CCC	Circuit Cross Connect
CE	Customer Edge LSR/Router
CGMP	Cisco Group Management Protocol
CIDR	Classless Inter-Domain Routing
CLI	Command Line Interface
CLNP	Connectionless Network Protocol
CoS	Class of Service
CPU	Central Processor Unit

xx	ABBREVIATIONS
C-RP	Candidate Rendezvous Point
CSMA-CD	Carrier Sense Multiple Access-Collision Detection
CSPF	Constrained Shortest Path First
CVS	Concurrent Version System
DCE	Data Communication Equipment
DCN	Data Control Network
DE	Discard Eligible
DNS	Domain Name System
DoS	Denial of Service
DPT	Dynamic Packet Transport
DR	Designated Router
DRR	Deficit Round Robin
DSCP	DiffServ Code Point
DTE	Data Terminating Equipment
DUAL	Diffusing Update Algorithm
DVMRP	Distance Vector Multicast Routing Protocol
DWDM	Dense Wavelength Division Multiplexing
EAP	Extensible Authentication Protocol
ECN	Explicit Congestion Notification
ECT	ECN Capable Transport
EIGRP	Enhanced Interior Gateway Routing Protocol
E-LSP	Diffserv integrated LSP using EXP bits to represent DSCP
ESP	Encapsulating Security Payload
EXP	MPLS Experimental Bits
FC	Feasibility Condition
FD	Feasibility Distance
FEC	Forwarding Equivalence Class
FECN	Forward Explicit Congestion Notification
FSC	Fibre Switched Capable
FT	Fault Tolerant TLV
FTP	File Transfer Protocol
GDA	Group Destination Address
GMPLS	Generalized Multiprotocol Label Switching
GPRS	General Packet Radio Service
GPS	Generalized Packet Scheduler
GRE	Generic Router Encapsulation
ICMP	Internet Control Message Protocol
IEEE	Institute of Electrical and Electronic Engineers
IETF	Internet Engineering Task Force
IGMP	Internet Group Management Protocol
IGP	Interior Gateway Protocol
IGRP	Interior Gateway Routing Protocol
IIH	IS-IS Hello PDU
IP	Internet Protocol

ABBREVIATIONS	xxi
IPS	Intelligent Protection Switching
IRR	Internet Routing Registry
IS	Intermediate System
IS-IS	Intermediate System to Intermediate System
ISO	International Organization for Standardization
IXP	Internet Exchange Point
L2TP	Layer 2 Tunneling Protocol
LDP	Label Distribution Protocol
LIR	Local Internet Registry
L-LSP	Diffserv integrated LSP using labels to represent different DSCP
LOL	Loss Of Light
LOS	Loss Of Signal
LSA	Link State Advertisement
LSC	Lambda Switched Capable
LSDB	Link State Database
LSP	Label Switched Path (MPLS)
LSP	Link State PDU (IS-IS)
LSR	Label Switching Router
MAC	Media Access Control
MBGP	Multiprotocol Border Gateway Protocol
MD5	Message Digest 5
MED	Multi-Exit Discriminator
MIB	Management Information Base
MPLS	Multiprotocol Label Switching
MRU	Maximum Receive Unit
MSDP	Multicast Source Discovery Protocol
MSP	Multiplex Section Protection
MTU	Maximum Transmission Unit
NAS	Network Access Server
NAT	Network Address Translation
NLRI	Network Layer Reachability Information
NSSA	Not-So-Stubby Area
NTP	Network Time Protocol
OCn	Optical Carrier ‘times n’
OID	Object Identifier
OOB	Out Of Band
OSI	Open System Interconnection
OSPF	Open Shortest Path First
P	Provider LSR (core LSR)
PCR	Peak Cell Rate
PDU	Protocol Data Unit
PE	Provider Edge LSR (aggregation LSR)
PHB	Per Hop Behaviour
PIM-DM	Protocol Independent Multicast Dense Mode

xxii	ABBREVIATIONS
PIM-SM	Protocol Independent Multicast Sparse Mode
PKI	Public Key Infrastructure
PMTU-D	Path MTU Discovery
PoP	Point of Presence
POS	Packet over SONET/SDH
PSC	Packet Switched Capable
PSTN	Public Switched Telephone Network
QoS	Quality of Service
RADIUS	Remote Authentication Dial-In User Service
RED	Random Early Detect or Random Early Discard
RIB	Routing Information Base
RIP	Routing Information Protocol
RIPE	Reseaux´ IP Europeens´ (The RIR for Europe, the Middle East and
	parts of Africa)
RIR	Regional Internet Registry
RMON	Remote Monitoring MIB
RP	Rendezvous Point
RPF	Reverse Path Forwarding
RPR	Redundant Packet Ring
RPT	Rendezvous Path Tree
RR	Route Reflector
RSN	Robust Security Network
RSVP	resource ReSerVation Protocol
RSVP-TE	RSVP with TE extension
RTP	Reliable Transport Protocol
SA	Security Association
SAR	Segmentation And Reassembly
SCR	Sustained Cell Rate
SDH	Synchronous Digital Hierarchy
SLA	Service Level Agreement
SNMP	Simple Network Management Protocol
SONET	Synchronous Optical Network
SPF	Shortest Path First
SPI	Security Parameter Identifier
SPT	Source Path Tree
SRP	Spatial Reuse Protocol
SSH	Secure Shell
SSL	Secure Sockets Layer
SSM	Source Specific Multicast
STM-n	Synchronous Transport Module ‘times n’
TACACS	Terminal Access Controller Access Control System
TCP	Transmission Control Protocol
TD	Topology Discovery
TDP	Tag Distribution Protocol

ABBREVIATIONS	xxiii
TE	Traffic Engineering
TED	Traffic Engineering Database
telco	Telephone Company
TFTP	Trivial File Transfer Protocol
TKIP	Temporal Key Integrity Protocol
TLS	Transport Layer Security
TLV	Type/Length/Value
ToS	Type of Service
TSC	Time Division Multiplexing (TDM) Switched Capable
TTL	Time To Live
UBR	Unspecified Bit Rate
UMTS	Universal Mobile Telecommunications System
USA	Unicast Source Address
VBR-NRT	Non-Real Time Variable Bit Rate
VBR-RT	Real Time Variable Bit Rate
VPLS	Virtual Private LAN Service
VPN	Virtual Private Network
VPWS	Virtual Private Wire Service
VRF	Virtual Routing and Forwarding Table
VSA	Vendor Specific Attribute
WDM	Wavelength Division Multiplexing
WDRR	Weighted Deficit Round Robin
WEP	Wired Equivalence Privacy
WFQ	Weighted Fair Queueing
WLAN	Wireless Local Area Network
WPA	WiFi Protected Access
WRR	Weighted Round Robin