, 289 DS3 networks, 3 failover design using, 171 GRE tunnels and, 157-161 DSCP (differential service code point), 423 information table, 92 class maps, 435 priority levels, 425 listing network interfaces to include, 118 metrics DSU (Data Service Unit), 257 (see also CSU/DSU) determining costs, 108 GRE tunnel interface, 156 DTP (Dynamic Trunking Protocol), 37 mutual redistribution with OSPF, 139, trunk configuration, CatOS switches, 40 duplex command (IOS), 23 duplex links (T1), 268 neighbors, sending update packets to, 119 duplex mode, 19 configuring for PIX firewall redistributing connected interfaces, 153 interfaces, 371 redistributing into, 135-137 metrics, 135 mismatch, causing spanning tree OSPF routes, 137 problem, 85 dynamic (switchport mode), 37 RIP routes, 137 dynamic routing protocols, 102 redistributing routes into RIP, 133 dynamic secure MAC addresses, 238 redistribution into OSPF, resulting Dynamic Trunking Protocol (DTP), 37 redistribution loop, 140 trunk configuration, CatOS switches, 40 route summarization, 119 route tags, setting with route maps, 143 routes redistributed into OSPF, using route tags, 142 Index email speeds, 19 bandwidth requirements in QoS support for full-duplex on 10Base-T and scheme, 434 100Base-T, 20 class maps, 436 Ethernet interfaces, 481 priority in QoS scheme, 433 Ethernet modules, 217 encapsulation frame-relay command, 309 Ethernet networks, 3 encapsulation frame-relay ietf multilayer switches, benefits of, 198 command, 309 multiple routing protocols on single encoding network, 104 DS3 line coding, 292 resilient channelized DS3, 297 HSRP interface tracking, 166-168 T1, 270-272 when HSRP isn't enough, 168-171 AMI (Alternate Mark Inversion), 270 support by OSPF, 125 B8ZS (Binary Eight Zero Ethernet Out-of-Band Channel (EOBC), 207 Substitution), 271 Ethernet switch, 11 CSU/DSU configuration, 283 ETRN deque command, 375 encryption European E-carrier hierarchy, 259 password, 344 Exchange VTP password on CatOS switches, 51 bandwidth requirements in QoS Enhanced FlexWAN modules,