 burst size, 604 Notification), 395 buses begin command (NX-OS), 278 Cisco 6500 switch support, 234-237 Bell Atlantic, 351 module interaction with, 241-244 BellSouth, 351 button command, 547 BERT (Bit Error Rate Test), 344, 369 BVI (Bridge Virtual Interface), 519 BGP (Border Gateway Protocol) administrative distance, 107, 126 communication considerations, 120 functionality, 143-145 C (control) bus, 234 MPLS support, 413 C-bit framing, 377 Binary Eight Zero Substitution (B8ZS), 358 call control, defined, 524 binary tree, 212 Call Manager Express (see CME) Index call quality, VoIP and, 524 changeto context command, 245 call-forward busy command, 546 changeto system command, 488 call-forward command, 544 channel bank, 344 called-number command, 562 channel groups, 381 caller-id command, 543 Channel Service Unit/Data Service Unit (see CAM (content-addressable memory) table, 11 CSU/DSU) Campus Area Networks (CANs), 3 channelized DS3, 375, 381-384 CANs (Campus Area Networks), 3 channelized T1, 357 capacity planning, 630 CHAP (Challenge Handshake Authentication Cat-5e cable, 5 Protocol), 442, 445-449 Catalyst 3750 switch chassis-based switches configuring trunks, 42 about, 14 configuring VLANs, 31 advantages of, 14 flex links and, 324 cooling considerations, 17 functionality, 229 disadvantages of, 15 interface ranges, 319 inserting modules, 18, 241 port security, 329-332 multilayer switch models, 228 QoS support, 338-340 planning installation, 16-18 smartport macros and, 320-324 power considerations, 16 SPAN support, 332-335 supervisors and, 238 stacking support, 14, 317-319 CIDR (Classless Internet Domain Routing), storm control and, 325-329 132, 654-656 voice VLAN and, 336-337 CIR (committed information rate), 390, 604 CatOS (Catalyst Operating System) Cisco 4500 series switches, 15 about, 10 Cisco 4948 switch, 15 CAM table, 11 Cisco 6500 switches configuring EtherChannel, 68 architectural overview, 233 configuring trunks, 44-46 buses supported, 234-237 configuring VLANs, 29-31 CatOS versus IOS, 249-253 IOS switch com