mmand, 68 IOS vs., 222-226 broadcasts, 8 PortFast, enabling and disabling, 81 sending useless RIP broadcasts, 134 switch running, show cam command, 14 burst rate (frame relay), 303 trunk configuration, 40 buses, 6500-series switches, 207 viewing trunk status, 41 interaction between, 214 UplinkFa configuring, 82 VLANs, configuring, 28 VTP domain, configuring, 50 VTP modes, 50 C bus (control bus), 207 VTP password, setting, 51 cables, 6 VTP pruning, 54 failover cable for PIX firewall, 378 C-bit framing, 290 fiber, unidirectional links, 86 CBWFQ (class-based weighted fair routing to modules on chassis-based queuing), 426 switches, 18 CEF (Cisco Express Forwarding), 181, 188 stacking, 228 configuring and managing switching calendar (Cisco devices), 508 paths, 193 ntp update-calendar command, 512 fast switching and, 192 Call Manager, 247 forwarding and adjacency tables, 189 call-control stream, VoIP, 419 load balancing over equal-cost paths, 190 calling router, 347 performance advantages, 189 CAM table (content-addressable memory trie, 188 table), 12 Index central office (CO), 257 queue too small in converged Challenge Handshake Authentication network, 458 Protocol (see CHAP) classful networks change control, 539-541 route contained in, 97 changeto context command, 218 subnetting rules, 487 channel bank, 257 wildcard masks, 324 channel group, 295 classful routing protocols, 111 Channel Service Unit/Data Service Unit (see RIP, 113 CSU/DSU) Classless Internet Domain Routing channelized DS3, 288 (CIDR), 116, 490 clear-channel DS3 vs., 292 classless network, conversion into classful configuring, 295-298 equivalent in EIGRP, 118 line coding, 292 classless routing protocols, 111 channelized T1, 270 EIGRP, 117 channelized T3, 288 OSPF, 125 channels classless routing, support in RIPv2, 116 configuring for T1 link, 284 clauses, building route maps from, 173 EtherChannel, 55 clear trunk command (CatOS), 42 (see also EtherChannel) clear vtp pruneeligible command CHAP (Challenge Handshake Authentication (CatOS), 54 Protocol), 347