g command parameter-problem ICMP messages, 333 allowing ICMP packet types needed partial mesh network, 304 for, 332 passive mode (LACP and PAgP), 60 pinging your own interface on frame passive-interface command, 115 relay, 313 Password Authentication Protocol (see PAP) PIX firewalls, 369-392 passwords access lists, naming, 326 password command, 343 VTP, 51 Turbo ACLs, 331 (see also authentication) using groups, 328-331 PAT (Port Address Translation), 338, 383 allowing MTU path discovery global command, 384 packets, 333 outside interface, using, 384 failover, 377-383 port redirection vs., 386 configuring, 380 simple PAT with public servers on monitoring, 381 inside, 385 terminology, 377 paths understanding, 378-380 best path to root bridge, 75 fixups, 375 BGP, 127 default on Version 6.2, 376 switching, configuring and SMTP fixup, 375 managing, 190-194 viewing status of, 376 payload loopback, 280, 281 ICMP packet filters, 333 Payment Card Industry (PCI), user data interfaces and priorities, 369-371 storage and access, 359 configuring interface name and PBX (private branch exchange), 264 priority, 370 PCI (Payment Card Industry), user data configuring speed and duplex storage and access, 359 mode, 371 per-destination load balancing, 193 showing status of interfaces, 371 performance traffic flow, 370 increasing, 527 names feature, 371 monitoring for T1 links, 274 NAT (Network Address bipolar violation (BPV), 275 Translation), 383-388 CRC6 (Cyclic Redundancy Check examples, 384-388 (6-bit)), 276 logging, 389 EES (extreme errored seconds), 276 NAT commands, 383 ES (errored seconds), 276 remote access to PIX firewall, 388 LOS (loss of signal), 275 saving configuration changes, 388 OOF (out-of-frame), 275 Index PIX firewalls (continued) ports object groups, 372-375 assigning to VLANs in CatOS, 28 support for gre keyword, 162 assigning to VLANs in IOS, 32 troubleshooting, 391 blocked uplink port, bypassing listening showing all active connections, 391 and learning states when designated translations, 391 port fails, 81 PL