Index U

T

T reference points, 519

T1 transmissions, 519

T3 transmissions, 519

TACACS+ (Terminal Access Control Access Control System), 60, 519

Tag Protocol Identifiers (TPIDs), 102

Tag Protocol Information (TCI), 102

tag switching, 519

tagged traffic, 519

tags for frames, 100-101

TCAM (Ternary Content Addressable Memory)

for bridging tables, 407

defined, 519

TCI (Tag Protocol Information), 102

TCP (Transmission Control Protocol), 519

TCP header compression, 519

TCP/IP (Transmission Control Protocol/ Internet Protocol), 519

TDM (Time Division Multiplexing), 519

TE (terminal equipment), 520

TE1 devices, 520

TE2 devices, 520

telcos, 520

telnet protocol

for connectivity tests, 69

defined, 520

passwords for, 61

Terminal Access Control Access Control System (TACACS+), 60, 519

terminal adapters, 520

terminal emulation, 520

terminal equipment (TE), 520

Ternary Content Addressable Memory (TCAM)

for bridging tables, 407

defined, 519

testing

for adjacency, 374

system, 422-423

TFTP protocol, defined, 520

Thicknet standard, 47, 520

Thinnet standard, 47, 520

Time Division Multiplexing (TDM), 519

time slots in Gigabit Ethernet, 54

Time to Live (TTL) field, 521

Time to Live (TTL) in multicast, 325-326

configuring, 326

for delivery management, 307-308, 307

timers

on root bridges, 147

STP, 177-179

timing in RSTP, 194

TLV (type-length-value) support, 113

token buses, 520

token passing, 520

Token Ring Interface Processor (TRIP), 521

Token Ring networks, 520

Token Ring VLAN support, 113

tokens, 520

toll networks, 520

topologies for MLS, 263, 263-264

TOS field, 360

TPIDs (Tag Protocol Identifiers), 102

trace command, 520

traceroute command, 69, 328

traffic classes in QoS, 362, 362

traffic shaping, 521

Transmission Control Protocol (TCP), 519

Transmission Control Protocol/Internet Protocol (TCP/IP), 519

transparent bridging, 521

transparent Ethernet, 385, 521

transparent mode, 109, 109, 113

Transport layer, 12, 521

trie pointers

in CEF, 268

defined, 521

TRIP (Token Ring Interface Processor), 521

troubleshooting

connectivity, 70, 327-329

MLS, 257

trunk links

defined, 521

for VLANs, 99-100

trunk port configuration, 103-105

Trunk Up-Down (TUD) protocol, 521

trunking, 102-103. See also VTP (VLAN trunk protocol)

trunk link verification, 106-107

trunk port configuration, 103-105

VLANs trunk link clearing, 105-106

trusts in Auto-Qos, 364

TTL (Time to Live) field, 521

TTL (Time to Live) in multicast, 325-326

configuring, 326

for delivery management, 307-308, 307

TUD (Trunk Up-Down) protocol, 521

tunneling

defined, 521

for VLANs, 120

type-length-value (TLV) support, 113