804
isdn spid2 command, 579, 595
isdn switch-type command, 579, 587, 595
I-series ISDN protocols, 568
ISL (Inter-Switch Link) tagging
configuring routers for, 176
VLANs, 175177, 205
ISP Dial certification (CCIE), 7
ITM (Internetworking Technology Multimedia), 11
ITU (International Telecommunications Union),
529, 568
K
keepalive command, 552, 594
keepalives
Frame Relay LMI status enquiry messages, 552
LMI, 675
key commands
Ctrl+a, 55
Ctrl+b, 54
Ctrl+e, 55
Ctrl+f, 54
Ctrl+n, 54
Ctrl+p, 54
Ctrl+r, 55
Ctrl+z, 37
Esc+b, 55
Esc+f, 55
L
LAAs (Locally Administered Addresses), 138
LAN addresses,
See
MAC addresses
LANE (LAN Emulation), 177, 205
LANs (local-area networks)
frames, 140142
loops, 158159
segmenting
with bridges, 145, 157158, 203204
with routers, 157158, 203204
with switches, 148154, 157158, 203
204
LAPB (Link Access Procedure Balanced), 520, 522,
590, 598
compression, 526528
strengths/weaknesses, 591, 602
LAPD (Link Access Procedure on the D channel),
522, 598
ISDN, 569
versus PPP on ISDN BRI B channels, 604
LAPF (link access procedure-frame mode bearer
services), 531, 533, 600
LAT (Local Area Transport), 110
latency (frames), decreasing with switch processing
latency, 152
Layer 1,
See
physcial layer
Layer 2,
See
data link layer
Layer 3,
See
network layer
Layer 4,
See
transport layer
Layer 5,
See
session layer
Layer 6,
See
presentation layer
Layer 7,
See
application layer
LCP (Link Control Protocol), 524525
Learning state (Spanning Tree), 170, 205
leased lines,
See
synchronous serial leased lines
line aux command, 29
line console command, 29
line vty command, 29
Link Access Procedure Balanced,
See
LAPB
Link Access Procedure on the D channel,
See
LAPD
link access procedure-frame mode bearer services
(LAPF), 531, 533, 600
Link Control Protocol (LCP), 524-525
Link Quality Monitoring (LQM), 524-525
link-state routing protocols, 360, 362, 422
CCNA exam coverage, 361
OSPF, 361
Listening state (Spanning Tree), 170, 205
LLC (Logical Link Control), 94
LLC2 (error recovery), 91, 114
LMI (Local Management Interface), 531534, 600
autosense feature, 532
flow information, displaying, 552
keepalives, 675
messages
defining, 551
status enquiry, 532
protocols, 532
status enquiry messages (keepalives), 552
types, 533, 600
local addressing (Frame Relay), 537
Local Management Interface,
See
LMI
isdn spid2 command
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