 222 scheme, 434 Enhanced Internal Gateway Routing Protocol priority in QoS, 433 (see EIGRP) express forwarding packets, 135 EOBC (Ethernet Out-of-Band Channel), 207 extended superframe (ESF), 274 equipment costs, 526 external gateway protocols (EGPs), 110 errdisable recovery cause psecure-violation BGP (Border Gateway Protocol), 126 command, 240 external routes, 105, 131 ErrDisable state (ports), 81 excluding from redistribution, 149 error-based Top-N report on CatOS, 226 OSPF, type-1 and type-2, 138 error-disabled state, 240 redistributed routes, 136 errors, framing, 274 extreme errored seconds (EES), 276 ES (errored seconds), 276 EtherChannel, 55-65 channel on CatOS, 55 configuring and managing, 60-65 fabric bus, 206 CatOS example, 61 fabric-enabled modules, 213 IOS example, 62-65 connectors, 213 protocols, 60 fabric-only modules, 213 corporate network design, 476 connectors, 214 differences in terminology, Cisco and fabrics, 208 interactions between different module Solaris, 56 as flex-link backup, 233 types, 214-217 load balancing, 56-60 nonfabric, fabric-enabled and fabric-only packet distribution on physical modules, 213 links, 57 failed state, CSM servers, 409 failover port channel interface on IOS, 55 speed of single logical link, 55 Ethernet fault tolerance, 401 10/100 links, auto-negotiation failures, 20 primary and secondary IP frame check sequence (FCS), 35 addresses, 402 resilient, 163-171 no failover testing, 516 HSRP, 163-166 Index failover (continued) FEOOF (far-end out-of-frame) signals, 290 PIX firewall, 377-383 Fiber Distributed Data Interface (FDDI), 3 configuring, 380 Fiber Distributed Data Interface (FDDI) monitoring, 381 networks, support by OSPF, 125 terminology, 377 FIFO (First In First Out), 443 understanding, 378-380 packets through serial interface, 420 failover active command, 383 filtering redistributed routes (see route maps) failover command, 380 Firewall Services Modules (FWSMs), 204 failover lan unit primary command, 377 firewalls, 361-368 failover link command, 381 alternate de