dhcpclient.1m (2010 09)

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dhcpclient(1M) dhcpclient(1M)

NAME

dhcpclient - Client for Dynamic Host Conﬁguration Protocol Server

SYNOPSIS

dhcpclient [-G][-N

hostname ] -b interface [-f traceﬁle][-g class-id ][

-l debug_level ][-n]

[

-p][-s

server_ipaddress][-t

log_type ][-x send_attempts][

-z time_to_wait ]

dhcpclient -d interface [-s server_ipaddress]

dhcpclient [-N hostname ][-f

traceﬁle][-l debug_level ] -m interface [-p][

-s

server_ipaddress][

-t log_type ][-z

time_to_wait ]

dhcpclient [-f traceﬁle][

-l debug_level ][-p] -r interface [-s server_ipaddress][

-t

log_type ]

dhcpclient -v

DESCRIPTION

dhcpclient is used to obtain the conﬁguration parameters from the Dynamic Host Conﬁguration Proto-

col (DHCP) server (bootpd (1M)) to conﬁgure the host. Currently,

dhcpclient supports 10bt (10BaseT)

and 100bt (100BaseT)

Ethernet networks only. It does not support FDDI and Token-Ring net-

works.

dhcpclient is invoked by the auto_parms script (see auto_parms (1M)) at boot up. The

/etc/rc.config.d/netconf

ﬁle is used for the conﬁguration of the interfaces. To invoke

dhcpclient using the auto_parms script, set the DHCP_ENABLE[index ] variable to a non-zero

value in the /etc/rc.config.d/netconf

ﬁle. dhcpclient can also be invoked at the command

prompt, when the interface is not conﬁgured.

Once the

dhcpclient obtains the conﬁguration parameters from the server, it is stored in a

conﬁguration ﬁle named /etc/dhcpclient.data

. The conﬁguration parameters are valid for a ﬁxed

time, lease time.

The conﬁguration information in

/etc/dhcpclient.data

ﬁle will be of the following format.

code><length><data>

00 <length> IFname

01 <length> hostname

02 <length> sname

03 <length> bootfile

04 <length> NIS_domain

05 <length> domain_name

06 <length> lease_duration

07 <length> lease_expiration

08 <length> T1

09 <length> T2

10 <length> htype

11 <length> chaddr

12 <length> IP_addr

13 <length> subnet_mask

14 <length> broadcast_addr

15 <length> default_gateway

16 <length> server_addr

17 <length> boot_server

18 <length> dest_gateway

19 <length> DNS_server

20 <length> LPR_server

21 <length> swap_server

22 <length> NIS_server

23 <length> NTP_server

24 <length> raw_options

The length ﬁeld denotes the length of the data ﬁeld following it.

All these lines collectively indicate one record. The conﬁguration ﬁle will have series of records.

Since this ﬁle contains all the conﬁguration information, it can be used to identify the server from which

the conﬁguration parameters were obtained. The conﬁguration ﬁle can also be used to obtain the same

conﬁguration parameters from the server. So, once the

dhcpclient is invoked, it will try to read the

HP-UX 11i Version 3: September 2010 − 1 − Hewlett-Packard Company 1

Summary of content (4 pages)

PAGE 1
dhcpclient(1M) dhcpclient(1M) NAME dhcpclient - Client for Dynamic Host Configuration Protocol Server SYNOPSIS dhcpclient [-G] [-N hostname ] -b interface [-f tracefile ] [-g class-id ] [-l debug_level ] [-n] [-p] [-s server_ipaddress] [-t log_type ] [-x send_attempts] [-z time_to_wait ] dhcpclient -d interface [-s server_ipaddress] [-N hostname ] [-f tracefile ] [-l server_ipaddress] [-t log_type ] [-z time_to_wait ] dhcpclient debug_level ] -m interface [-p] [-s dhcpclient [-f tracefile ] [-l de
PAGE 2
dhcpclient(1M) dhcpclient(1M) configuration file, /etc/dhcpclient.data. While trying to read the /etc/dhcpclient.data file, the following conditions are possible: A 1. It may be possible that the configuration file had been deleted or it may not be available for reading. 2. The file may have got corrupted and contains irrelevant data for the particular interface. 3. There may be no configuration information for the particular interface. 4.
PAGE 3
dhcpclient(1M) dhcpclient(1M) configuration file, /etc/dhcpclient.data. -s server_ipaddress This option is used to specify the ip address of the DHCP server from which the reply should be accepted. server_ipaddress must be a unicast IP address specified in dotted decimal form. -t log_type If the log_type is a non zero value and if the debug_level is low enough for the process to detach from the tty (see syslog (3C)), then, the logging goes to syslog, else it goes to STDERR.
PAGE 4
dhcpclient(1M) dhcpclient(1M) SEE ALSO auto_parms(1M), bootpd(1M), bootpquery(1M), dhcptools(1M), syslog(3C). DARPA Internet Request For Comments: RFC1541, RFC1542, RFC1533, RFC1534, Assigned Numbers RFC.