custom groups, 452 ASA considerations, 506 default server groups, 451 VPN support, 167 functionality, 450 remote alarm indication (RAI), 364 RAI (remote alarm indication), 364 Remote Switched Port Analyzer (RSPAN), 332- rate-mode command, 288 RBOCs (Regional Bell Operating Companies), remote-span command, 335 348, 351 repeaters Real Time Protocol (RTP), 524 about, 5 receive interrupts, 209 design considerations, 6 red alarm, 364 hubs and, 5, 6 redirect servers, 555 segments and, 6 redistribute command requirements documents, 628 adding to process, 148 Response Time Reporter (RTR), 194 applying route maps to, 199 reverse binary method (subnet allocation), OSPF and, 154 real-world example, 165 RFC 1129, 689 route tags and, 159 RFC 1232, 362-363-366 redistribute connected command RFC 1334, 442 GRE tunnels and, 173 RFC 1700, 650 redistribution loops and, 157 RFC 1701, 167 RIP and, 151 RFC 1878, 660 route tags and, 161 RFC 1918, 649, 654 redistribute ospf command, 154 RFC 2058, 450 redistribute static command, 150 RFC 2059, 450 redistribution Index RFC 2281, 181, 184 router-on-a-stick configuration, 28 RFC 2373, 676 routers RFC 2460, 672 authentication support, 453 RFC 2474, 580 broadcasts and, 8 RFC 2784, 167 CHAP authentication and, 447-449 RFC 3177, 678 Cisco, 178, 207-220 RFC 3330, 650 communication between, 120-122 RFC 4291, 675 configuring, 594-598 RFC 5095, 672 functionality, 7, 106 RFC 5722, 672 IPv6 addresses and, 679-688 RFC 5871, 672 Nexus platform and, 278 RFC 791, 105 OSPF classifications, 138 RFC 795, 579 routing protocols and, 119 RFC 958, 689 sample MPLS configuration, 413 RIB (route information base), 106-109, 207 switching algorithms and performance, RIP (Routing Information Protocol) administrative distance, 107, 126 routing counting to infinity problem, 124 between VLANs, 27 functionality, 129-132 cables to modules, 18 redistributing into, 149-152 defined, 105, 207 RIPv2, 132 in ecommerce website designs, 644 RJ45 connectors, 5 key terms, 128 rollback running-config checkpoint command, spanning tre