background image
702
LANs
ATM, 124-125
BUS, 125
LEC, 126
LECS, 125
LES, 125
ELANs, 124
Ethernet, 77
10Base5, 79
10BaseFL, 79
10BaseT, 79
100BaseT, 80-81
100BaseX, 79
CSMA/CD, 78
switching, 80
FDDI, 83
remote access, 401
remote-control access, 401
remote-node access, 402
routing, 85
segmentation, 79
routing, 92
switches, 90-91
switching, 84-85
Token Ring, 81-82
switching, 82
LAPB (Link Access Procedure, Balanced), 404
LAPB encapsulation, 333
laser technology, 90
Layer 3 switching, 92
layers of SNA model, 434-435
versus OSI model, 435
LCP (Link Control Protocol), 403-404
leased lines, 298
analog backup links, 391
FEPs, connecting, 458
LEC (LAN Emulation Client), 126
LEC (local exchange carrier), 395
LECS (LAN Emulation Configuration Server), 125
LENs (low entry nodes), 491
LES (LAN Emulation Server), 125
LFSID (Local Form Session Identifier), 491
line-of-sight networks, 90
Link Control Protocol.
See
LCP
link failures, SNA, 482
link recovery, DLSw+, 522
links, bundles, 405-406
link-state database, LSAs, 220
AS-External LSAs, 222
network LSAs, 221
router LSAs, 221
summary LSAs, 221
link-state protocols, 268-269
link-state routing protocols, 185
algorithms, 188
areas, 218
convergence, 198, 230-231
metrics, 186-187
OSPF, 218
adjacencies, forming, 226
Area 0, 231
BDRs, 227
bit splitting, 233
classes of routers, 219
cost, calculating, 222
discontiguous subnets, 233
DRs, 227
external routes, 229
load balancing, 231
network connection types, 218-219
not-so-stubby areas, 229
path determination, 222
scalability, 225
security, 225-226
stub areas, 228, 230
summarization, 224
totally stubby areas, 229
virtual links, 232
route redistribution, 200
within the same network, 201
route summarization, 198
LLC2 (Logical Link Control type 2), 490
ABM, 453
timeouts, 490
LLC2 frames, 452
session establishment, 454-455
LLC2 idle timer, 539
LLC2 timers, 456
LMHOSTS file, resolving NetBIOS names, 273
LMI, 356
load, 187
LANs
87200333IX.fm Page 702 Wednesday, August 22, 2001 2:01 PM