trol, 539-541 access lists and, 161 not being a computer jerk, 541-544 creating tunnels, 153 selling your ideas to defined, 150 management, 532-536 tunnels and routing protocols, 156-161 when to upgrade and why, 536-539 running GRE through VPN why everything is messed up, 529-532 tunnel, 160 inability of engineers to communicate gre keyword, configuring access lists, 161 needs to management, 531 group of major networks (see supernets) lack of knowledge or caring about group of subnets (see summary routes) problems, 532 groups network design low in upper in access lists, 328-331 HSRP, 163 management priorities, 530 piecing together rather than designing object groups, 372-375 networks, 530 rapid growth of small companies, 530 Index hybrid mode, 198 SVIs, 201-203 half-duplex links, 19 hybrid protocol (EIGRP), 108 default on 100Base-T Ethernet, 20 example, 21 half-duplex mode, spanning tree problem caused by, 85 IANA (Internet Assigned Numbers hashing algorithm determining physical link Authority), multicast to be used for a packet, 56 addresses, 103 HDB3 (High-Density Bipolar Three) line coding, 292 allowing MTU path discovery hit counts for access list lines, 328 packets, 333 hop count metrics, 106 allowing types needed for ping and maximum count in RIPv2, 116 traceroute, 332 RIP Version 2, 107 unreachable types, 332 host keyword (tacacs-server command), 355 IDS (intrusion detection system), using with host networks, RIP and, 114 SPAN, 241 host routes, 95 IDSM (intrusion detection system being received by RIP (example), 115 modules), 220 hostnames, 472 ietf frame-relay encapsulation, 309 Hot Standby Router Protocol (see HSRP) IGPs (internal gateway protocols), 110 HSRP (Hot Standby Router IGRP (Internal Gateway Routing Protocol) Protocol), 163-166 EIGRP, 117 configuration, 165 (see also EIGRP) interface tracking, 166-168 limitations of, 168-171 bandwidth requirements in QoS RFC 2281, 164 scheme, 434 simple design (example), 164 priority in QoS, 433 viewing status on routers, 166 in-band signaling, 270, 272 HTTP, 4