Droms R. The DHCP handbook
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transmitting DHCP messages
broadcast flags, 86
DHCPFORCERENEW type, 94
DHCPINFORM type, 93
DHCPLEASEQUERY type, 94
DHCPRELEASE type, 94
DHCPREQUEST type, 92-93
server responses, 85-86
UDP port numbers, 83-85
transport layer (TCP/IP)
TCP, 53-54
UDP, 53
Trivial File Transfer Protocol (TFTP), send-and-
wait mechanism, 53
troubleshooting
clients
identifier problems, 426
incorrect option values, 426
IP address acceptance, 285
connectivity problems
client/server overview, 417
network interface cards, 417-419
relay agents, 419
DNS updates, debug guidelines, 410-411
dual-boot client systems, identical client iden-
tifiers, 427
failovers on ISC DHCP servers, 319-320
incorrect DNS information from DHCP server,
415
IP addresses, failure to obtain by ISC DHCP
client, 356-357
ISC DHCP server
255.255.255.255 broadcast address, 528
HP-UX difficulties, 530
Linux difficulties, 528-530
Solaris difficulties, 530
leases
failure to acquire, 414-415
failure to renew, 414-415
reserved IP addresses, 428
servers
configuration error among cooperating
servers, 424-425
DHCPNAK message, 423-426
rogue DHCP servers, 424
static address allocation to dynamic IP
address pool, 285
TSIG (transaction signatures), 187
DNS updates, 397-400
TTL (time to live field), TCP/IP internet layer, 51
U
UAP server option (Service Location Protocol),
156
UDP (User Datagram Protocol)
messaging process, 53
port numbers, DHCP message transmittal,
83-86
unauthorized servers, locating, 273
unicast addresses (IPv6), 432
unicast messages (DHCP), 85
uninstalling DHCP service, 221
uninterruptible power supply (UPS), 291-292
Universal Character Set (UCS), 151
Unix, ping command, network interface cards,
troubleshooting, 418-419
unknown clients permit, pool declaration, 467
unpacking ISC DHCP server distributions,
226-227
unset statement, 478
update-optimization statement, 493
update-static-leases statement, 494
transmitting DHCP messages586
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updating
DNS
client-supplied hostnames, 396
debugging, 410-411
DHCP advantages, 394
DHCP client configuration, 404-405
DHCP server configuration, 400-404
DNS server configuration, 402, 405-407
dual booting issues, 397
ISC DHCP client configuration, 404-405
name clashes, 397
no supplied hostnames, 397
policies, setting, 395-397
security, 397-400
ISC DHCP server configuration files, 249
use-lease-addr-for-default-route statement, 490
user class option (host configuration parame-
ters), 136
client grouping on ISC DHCP server, 347-348
user classes, configuration options, 218
User Datagram Protocol. See UDP
user interface, configuring (winipcfg), 362-363
V
validating DHCP messages, authentication
process, 99
value definition statements
filename statement, 495
next-server statement, 495
option statement, 495-496
server-name statement, 495
variable operator (indeterminate), 479
variable-format messages (DHCP), 69-70, 506
variables, leases (ISC DHCP server), 352-353
vendor class identifier option (DHCP-specific
options), 128
client grouping on ISC DHCP server, 348-350
vendor-option-space statement, 491
vendor-specific information option (DHCP-
specific options), 128-129
client grouping on ISC DHCP server, 350-351
virtual hosting (IPv6), 437
Vixie Enterprises, ISC office network configura-
tion, 263-265
W - Z
WAN ports, configuring (DHCP service), 390
Web sites
DHCP-Handbook, 519
DHCP.org, 432, 519
Dynamic Host Configuration Working Group
(DHCWG), 62-63
IANA (Internet Assigned Number Authority),
505
IETF (Internet Engineering Task Force), 160,
519
DHCPv6 specification information, 440
ISC (Internet Software Consortium), 224, 519
Microsoft, 359
RFC Editor, 520
Windows 95, ping command, network interface
cards, troubleshooting, 418-419
Windows 98
Microsoft DHCP client
enabling, 359-360
installing, 359-360
ping command, network interface cards,
troubleshooting, 418-419
proxy ARP, 268-269
Windows 98 587
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Windows 2000, Microsoft DHCP client
enabling, 361-362
installing, 361-362
proxy ARP, 268-269
winipcfg command (Windows 95/98)
IP address determination, 415
Microsoft DHCP client, user interface configu-
ration, 362-363
WWW server option (NIS service options), 146
X Window System, parameters option
X Window System Display Manager, 147
X Window System Font Server, 147
xid field, DHCP fixed-format message section, 71
yiaddr field, DHCP fixed-format message
section, 71
zones (DNS)
declaration, 472
start of authority (SOA) records, 401-402
Windows 2000588
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