ut, 362 address types and, 675 bipolar violation, 362 defined, 10 CRC6, 363 malformed, 217 Errored Second counter, 363 marking, 578 Extreme Errored Seconds counter, 363 MPLS support, 409 loss of signal, 362 MTU path discovery, 426 out-of-frame, 362 multicast, 120 permanent virtual circuit (PVC), 387, 401, 403- policing, 578 protocols and, 524, 575 permit clause (route maps), 199 QoS misconceptions, 588 PFC (policy feature card), 238 RIP considerations, 152 phase-locked loop (PLL), 371 route maps and, 198 phone configuration routing, 207, 208 ephone command, 546-550 scheduling, 578 ephone-dn command, 543-546 switching, 207, 208 message waiting lamps, 550 TOS field, 578-581 paging feature, 546 VLANs and, 25 process overview, 543 paging feature, 546 phone registration, 567 paging-dn command, 547 physical audits, 703 PAgP (Port Aggregation Control Protocol), 68, physical layer first rule, 702 ping tool, 425, 680 PAP (Password Authentication Protocol), 442, pinning, defined, 293 443-444 PIX firewalls partial mesh networks, 391 ASDM software, 469 passive-interface command, 132, 133 displaying IP addresses as names, 473-474 passthru mode (FEX), 290 fixups feature, 477 Password Authentication Protocol (PAP), 442, grouping, 421-423 443-444 most-used on top example, 420-421 password command, 437 transparent mode, 470 passwords, 437 Index plain-old telephone service (POTS), 351, 528, PPP (Point-to-Point Protocol), 442-449, 453, 551-553 PLAR (Private Line Automatic Ringdown), ppp authentication chap command, 447 ppp authentication command, 456 plar command, 555 ppp authentication pap callin command, 443 PLL (phase-locked loop), 371 ppp chap hostname command, 448 PoE (Power over Ethernet), 527 ppp pap sent-username command, 443, 444 point-to-multipoint networks, 140 PPTP (Point-to-Point Tunneling Protocol), point-to-point networks, 140 Point-to-Point Protocol (PPP), 442-449, 453, preshared keys (PSK), 515 PRI (Primary Rate Interface), 347, 357 Point-to-Point Tunneling Protocol (PPTP), primary ASA, 491 primary command, 500 poi