Index M

L

L3SM (Layer 3 Switching Module), 211-212, 215

defined, 495

for VLAN configuration, 216-218

LAN Emulation (LANE), 100, 495

LAN Emulation Address Resolution Protocol (LE ARP), 496

LAN Emulation Client (LEC), 496

LAN Emulation Configuration Server (LECS), 496

LAN Emulation Network-to-Network Interface (LNNI), 497

LAN Emulation Server (LES), 496

LAN Emulation User-to-Network Interface (LUNI), 497

LAN segmentation, 48

LAN switches, 148, 148

cut-through, 149

defined, 495

FragmentFree, 149

layer 2. See layer 2 switching

store-and-forward, 149

LANE (LAN Emulation), 100, 495

LANs (local area networks)

defined, 494

virtual. See VLANs (virtual LANs)

LAPB (Link Accessed Procedure, Balanced), 495

LAPD (Link Access Procedure on the D channel), 495

large packet streams, 244

latency, 495

laws of physics delay

in best efforts networks, 356

defined, 495

layer 2 backbones, 27-28, 27

layer 2 switching, 136

bridges vs. switches in, 136-137

defined, 495

exam essentials for, 153

functions of, 137-141, 138, 140

key terms for, 154

limitations of, 13

loop avoidance in, 139-141, 140

review questions for, 155-158, 160

spanning tree operation. See STP (Spanning Tree Protocol) and spanning tree operation

summary, 153

switch types in, 148-149, 148

written lab for, 154, 159

layer 3 backbones, 28

Layer 3+ switches, load balancing in, 187

layer 3 switching, 14-15

CEF with, 265

defined, 495

legacy routing with, 265-266

Layer 3 Switching Module (L3SM), 211-212, 215

defined, 495

for VLAN configuration, 216-218

layer 3 to layer 2 overlap in address mapping, 292-293, 293

layer 4 switching, 15, 495

layered architecture, 495

LCP (Link Control Protocol), 495

LE ARP (LAN Emulation Address Resolution Protocol), 496

leaf routers, 314, 495

leaky buckets, 496

learning bridges, 496

learning state, 145-146, 146

leased lines, 496

Leave process

in CGMP, 301

in IGMPv1, 296

in IGMPv2, 297, 298

LEC (LAN Emulation Client), 496

LECS (LAN Emulation Configuration Server), 496

LEDs, 56

legacy equipment, multiple links for, 210

legacy routing with layer 3 switching, 265-266

LES (LAN Emulation Server), 496

line loss

in best efforts networks, 358

defined, 496

Link Access Procedure on the D channel (LAPD), 495

Link Accessed Procedure, Balanced (LAPB), 495

Link Control Protocol (LCP), 495

Link State Advertisement (LSA)

defined, (LSA), 497

in OSPF, 309-310

link state LEDs, 56

link-state routing algorithm, 496

listening state, 145-146, 146

LLC (Logical Link Control)

defined, 496

group for, 47

LMI (Local Management Interface), 497

LNNI (LAN Emulation Network-to-Network Interface), 497

load balancing

in GLBP, 384

in scaling layer 3 backbones, 28

in STP redundant links, 186-187

load sharing in fast switching, 267

local area networks (LANs)

defined, 494

virtual. See VLANs (virtual LANs)

local explorer packets, 497

local loops, 497

Local Management Interface (LMI), 497

local services

defined, 497

in new campus model, 10

local VLANs

boundaries for, 93

defined, 497

locator command, 257

logical hierarchies, 17

Logical Link Control (LLC)

defined, 496

group for, 47

logical network addresses, 14

long option for MLS entries, 262

loop avoidance

blocking ports for, 146

defined, 497

detection in, 150

in layer 2 switching, 139-141, 140

LSA (Link State Advertisement)

defined, 497

in OSPF, 309-310

LUNI (LAN Emulation User-to-Network Interface), 497

LZW algorithm, 497