e design considerations, 104 VRF support, 115-117 rolling back configurations, 309-312 Routing Information Protocol (see RIP) root bridges routing protocols, 127 defined, 88 (see also specific routing protocols) determining best paths, 89 administrative distance, 107, 122, 125 determining root ports, 89 communication between routers, 120-122 electing, 88 distance-vector, 124 spanning tree design considerations, 104 functionality, 119, 127-129 root ID, 89 GRE tunnels and, 173-178 root ports, 89 link-state, 124 route cache, 211 metrics and protocol types, 123-125 route information base (RIB), 106-109, 207 redistribution process and, 148 route maps route maps and, 198 access list comparison, 197 routing tables and, 106 building, 198-200 routing tables packets and, 198 about, 106-109 policy routing and, 198, 200-205 IP routing table, 109-115 routing protocols and, 198 RIB as, 207 route poisoning, 128 types supported, 109 route tags, 159-162 routing-context vrf command, 282 routed mode (ASAs), 493 routing-context vrf default command, 117, router ACLS, 427, 428 router command, 130 RPS (Redundant Power System), 229 router eigrp command, 134 RSPAN (Remote Switched Port Analyzer), 332- router LSAs, 138 router-id command, 140 RTP (Real Time Protocol), 524 Index RTP streams, 524 set spantree backbonefast disable command, RTR (Response Time Reporter), 194 set spantree backbonefast enable command, set spantree bpdu-guard command, 97 SCCP (Skinny Call Control Protocol), 526 set spantree portfast disable command, 96 scheduling packets, 578 set spantree portfast enable command, 96 scientific notation, 671 set spantree uplinkfast disable command, 98 secondary ASA, 491 set spantree uplinkfast enable command, 98 section command (NX-OS), 278 set trunk command, 44 Secure Shell (SSH), 167 set vlan command, 29, 34 security considerations, 459 set vtp domain command, 56 (see also firewalls) set vtp mode command, 57 AAA authentication, 450-452 set vtp passwd command, 58 inspections, 477-479 set vtp pruneeligible command, 60 port security