Index_A

A

AAL (ATM Adaptation Layer), 89, 621

ABRs (Area Border Routers) in OSPF

address summarization, 194–195

defined, 621

multi-area configuration, 154, 157

NSSAs, 193

stub areas, 179

TSAs, 187

accept actions

defined, 620

in EBGP, 508, 526

in IBGP, 377

in IS-IS, 302

accept-data option

in EBGP, 496

in VLAN and VRRP configuration, 103

access reject messages, 17

actions, 620

active connections in IBGP, 379

active keyword, 427

active routes, 620

active state

in EBGP peering, 489

in IBGP authentication, 386

add/drop multiplexer (ADM), 620

Address Resolution Protocol (ARP)

caches

in EBGP peering, 496

in MAC address filtering, 112

defined, 620

for Ethernet interfaces, 102

address summarization, 194–197

addresses

in EBGP peering, 491

IP. See IP addresses

MAC

in Ethernet interfaces, 101, 111–113

in IS-IS, 278, 314–315

match conditions, 620

in POS interfaces, 68

in unnumbered interfaces, 124–125

adjacencies

defined, 620

in IS-IS, 272–274, 276, 323

in OSPF, 156, 160, 164–166, 225–227

Adjacency-RIB-In table, 620

Adjacency-RIB-Out table, 620

ADM (add/drop multiplexer), 620

Advanced SSH Options dialog box, 13

advertise-inactive option

in EBGP, 575

in IBGP, 457

advertisements

in EBGP

import policy, 505

route filtering, 526

in IBGP, 380–382, 415–416

link-state. See LSAs (link-state advertisements) in OSPF

AFIs (Authority and Format Identifiers), 258

aggregate routes

defined, 620

in EBGP

case study, 573–574, 577, 579–580

filtering, 532, 534–537

aggregated interfaces

Ethernet, 114–117, 114

SONET, 117–119

aggressive damping, 505

AHs (Authentication Headers), 622

alarm configuration, 33–34

ALI (ATM Line Interface), 621

all keyword in IS-IS, 265

allow-commands option, 18

allow keyword

in EBGP peering, 491

in user accounts, 10

Alternate Priority Queuing (APQ), 621

Amnesiac prompt, 5

ANSI (American National Standards Institute), 621

application-specific integrated circuits (ASICs), 621

APQ (Alternate Priority Queuing), 621

APS (Automatic Protection Switching), 622

area 1 configuration, 161

area 49.0001, 257, 257

area 49.0002, 257, 257

authenticating, 282–283, 286

configuring, 270

verifying, 271

area 49.0003

configuring, 287–290, 287

verifying, 290

Area Border Routers (ABRs) in OSPF

address summarization, 194–195

defined, 621

multi-area configuration, 154, 157

NSSAs, 193

stub areas, 179

TSAs, 187

area-range option, 194–196

area routing subdomains, 621

ARP (Address Resolution Protocol)

caches

in EBGP peering, 496

in MAC address filtering, 112

defined, 620

for Ethernet interfaces, 102

asbrsummary option, 182

ASICs (application-specific integrated circuits), 621

ASs (Autonomous Systems)

AS numbers

in EBGP, 587–588

in IBGP, 375–377, 379, 402, 405–406, 412, 414

ASBR-summary LSAs

defined, 621

in stub areas, 179, 182

boundary routers, 201

address summarization, 196

defined, 622

NSSAs, 188

with RIP, 219

defined, 622

in EBGP, 542–543

external-link advertisements, 621

IGP routing in, 154

paths, 581–582, 621–622

asterisks (*) for NTP servers, 26–27

ATM (Asynchronous Transfer Mode), 89, 90

defined, 621

ILMI operation with, 95–97

with IS-IS, 277

logical properties for, 91–93

multipoint connections for, 97–98, 97

physical properties for, 90–91

summary, 100

traffic shaping for, 98–100

verifying, 93–97

ATM Adaptation Layer (AAL), 89, 621

ATM Line Interface (ALI), 621

atomic operations, 621

attached bit, 314

attempt adjacency state, 621

AUC (authentication center), 622

auth file, 21

authentication

in IBGP

case study, 448

configuring, 383–386

verifying, 386

in IS-IS, 278

area 49.0002, 282–283, 286

case study, 324–326

r3 and r4, 280–282

r5, 278–280

troubleshooting, 283–286

in OSPF, 173–175

protocol tracing, 177–178

verifying, 176–177

in RADIUS, 11, 15–16, 47

for root account, 11–12

for users, 47

in VRRP, 107–111

authentication center (AUC), 622

Authentication Headers (AHs), 622

authentication-key option, 174

authentication-order list, 15–16

authentication-type option, 174

Authkey keyword, 386

Authority and Format Identifiers (AFIs), 258

authorization messages, 20

auto-RP method, 622

Automatic Protection Switching (APS), 622

Autonomous Systems (ASs). See ASs (Autonomous Systems)