E channels, 484
E.164 standard, 484
e-mail, QoS for, 351, 351
E1 transmissions, 484
EARL (Enhanced Address Recognition Logic), 180
EBC (Ethernet Bundle Controller), 180
edge devices, 484
Edge Distribution Module, 53
EEPROM (Electronically Erasable Programmable Read-Only Memory), 484
EFCI (Explicit Forward Congestion Indication) mode, 484
EFM (Ethernet in the First Mile), 386
EI (enhanced image) IOS, 411, 485
EIGRP (Enhanced IGRP)
block support in, 26
defined, 485
EIP (Ethernet Interface Processor), 484
ELANs (emulated LANs), 484
ELAP (EtherTalk Link Access Protocol), 484
Electronically Erasable Programmable Read-Only Memory (EEPROM), 484
emulated LANs (ELANs), 484
enable packets
defined, 484
identification of, 249-250, 250-251
enable secret command, 60
enabling
MLS, 252, 258-259
multicast routing, 319-320
PIM on interfaces, 320-323
spanning tree, 150
encapsulation
defined, 485
in OSI model, 11-12, 11
encapsulation command, 213
encapsulation isl command, 214
encryption, 485
end-to-end multicast, 317-318
end-to-end VLANs
boundaries for, 93
defined, 485
Enhanced Address Recognition Logic (EARL), 180
Enhanced IGRP (EIGRP)
block support in, 26
defined, 485
enhanced image (EI) IOS, 411, 485
enterprise networks, 485
enterprise services
defined, 485
in new campus model, 10
EPROM (Erasable Programmable Read-Only Memory), 485
erase command, 71
erase all command, 72
erase startup-config command, 182
erasing switch configuration, 70-72
error command, 257
error correction, 485
ESFs (Extended Superframes), 485
essentially non-blocking switches, 404, 406
EtherChannel, 180
configuration of, 181-186
guidelines for, 180-181
Ethernet Bundle Controller (EBC), 180
Ethernet in the First Mile (EFM), 386
Ethernet Interface Processor (EIP), 484
Ethernet networks and media, 4
10BaseT, 49
background of, 47
comparisons between, 54
defined, 485
FastEthernet, 49-52
Gigabit Ethernet, 52-54
mapping multicast to, 289-293, 290-293
port connections to, 56
switched, 48
transparent, 385
EtherTalk Link Access Protocol (ELAP), 484
events command, 257
exam essentials
campus networks, 32-33
inter-VLAN routing, 222
layer 2 switching, 153
MLS, 271
multicast, 332-333
QoS, 386-387
STP, 195
switch blocks, 73-74
switching technologies, 424-425
VLANs, 121
excess rate, 485
exclude lists in IGMPv3, 299
Exclude mode membership reports, 299
exit command, 459
expansion, 486
expedited delivery, 486
Explicit Forward Congestion Indication (EFCI) mode, 484
explorer packets, 486
extended IP access lists, 486
extended IPX access lists, 486
Extended Setup, 486
Extended Superframes (ESFs), 485
external route processors, 486
external routers, 213-214
hands-on labs for
2621 router configuration, 235-236
2950A switch configuration, 228-229
2950B switch configuration, 229-230
4000 switch configuration, 230-233
VLAN configuration, 233-234