, 309-316 FECN (Forward-Explicit Congestion network with more than two Notification), 308 nodes, 311-314 Federal Standard 1037C, simple two-node network, 309-311 "Telecommunications: Glossary of subinterfaces, 314-316 Telecommunication Terms", 254 Index DLCIs (data link control identifiers), 301 ft command, 401 mapping to IP addresses, 302 FTP, 419 LMI (Local Management QoS priority over HTTP, 428 Interface), 307-308 full-duplex links, 19 congestion avoidance in frame example, 21 relay, 308 support by 10Base-T and 100Base-T network design, 303-305 Ethernet, 20 ordering service, necessary fully meshed network (frame relay), 304 information, 302 fully qualified domain name (FQDN), 472 oversubscription, 306 FWSMs (Firewall Services Modules), 204, troubleshooting, 316-319 217,369 problem isolation, steps in FXS (Foreign eXchange Service) process, 316 modules, 222 frame-relay interface-dlci command, 315 frame-relay lmi-type command, 307 frame-relay map command, 315 frame-relay networks, 3 GAD's Maxims, 521-528 NBMA (nonbroadcast multiaccess), 125 driving forces of network frames, 10 design, 521-523 sent over a trunk, adding VLAN reasons for company to fund changes to information in ISL, 35 existing network, 525-528 framing valid reasons to change properly sized DS3 (Digital Signal 3), 288-292 production network, 524 C-bits, 290 gateways, 91 channelized DS3, 297 default gateways clear-channel DS3 framing, 292 router with two, 101 configuring for clear-channel DS3, 293 Generic Routing Encapsulation (see GRE M13, 289 tunneling protocol) M23, 296 Gigabit Ethernet, 19 errors, 274 auto-negotiation, 22 T1, 272-274 gigabit GBIC slots, stacking GBICs in, 227 CSU/DSU configuration, 284 global command, 384 D4/superframe, 273 inside network using the Internet, 387 ESF (extended superframe), 274 global macros, 229 LOF (loss of frame) errors, 285 GPS (Global Positioning System), 511 OOF (out-of-frame) condition, 275 GRE (Generic Routing Encapsulation) frustration, avoiding, 529-544 tunneling protocol, 151-162 benefits of change con