Optimal Routing Design

Index

Numerics

802.1x, 343–344

A

A bits, Frame Relay, 286

ABRs (area border routers), BGP, 234

abstraction through layering, 35–36

access layer, routing, 83

best next hop, 86–87

dual-homed remotes, 85–86

single-homed sites, 84

access lists, 204

access-list command, 204

active process, EIGRP, 110–112

Active state, BGP neighbors, 227

add/drop multiplexer (ADM) error, 284

adjacencies

building, 403–404

detecing failures, 280–283

IS-IS, 217, 318

building, 415–416

link flaps, 262

on multiaccess networks, 405

OSPF, 318

administrative distance

BGP, 235

preventing redistribution routing loops, 131–132

advertisements, BGP, 226

conditional advertisements, 255

aggregation

IS-IS, 190

OSPF, 160–162

versus summarization, 192

aggregation layer, summarization, ...