HP-UX Reference (11i v1 00/12) - 1M System Administration Commands A-M (vol 3)

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STANDARD Printed by: Nora Chuang [nchuang] STANDARD

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bootpd(1M) bootpd(1M)

lease-policy= policy

This tag speciﬁes whether or not the assigning of new leases can be done. If policy is set to

reject-new-clients then no new clients can get a lease, and only clients with existing

leases will get a response. accept-new-clients is the default.

allow-bootp-clients=boolean

This tag speciﬁes whether or not bootp clients can be members of the group being deﬁned. The

default is false.Ifboolean is TRUE, then an IP address may be assigned to a client that

doesn’t have an entry in the bootptab ﬁle and that is on the same subnet as the group being

deﬁned. This address is treated as an inﬁnite lease, and a boot reply is sent to the client. This

tag is is not appropriate for dhcp_device_group, since bootp clients don’t have a client

class (and therefore a bootp client would be incapable of matching the client class of the device

group). If this tag is used for dhcp_default_client_settings, then it is only applica-

ble to pool groups.

ddns=ip-address

This tag speciﬁes the IP address of the Domain Name Server (DNS) to which dynamic update

requests are sent.

pcsn

This tag speciﬁes that the name sent by client should be given preference. As a boolean tag, if

set it causes bootpd to accept the name sent by the client (if any). If name is not sent by the

client, bootpd tries to ﬁnd one.

sp As a boolean tag, if set it causes bootpd to not use pre-requisite section in the update request

when an update request is to be sent to DNS.

DHCP/BOOTP Packet

The DHCP/BOOTP packet has the following format:

struct dhcp {

unsigned char op; /* packet opcode type */

unsigned char htype; /* hardware addr type */

unsigned char hlen; /* hardware addr length */

unsigned char hops; /* gateway hops */

unsigned long xid; /* 4 bytes transaction ID */

unsigned short secs; /* seconds since boot began */

unsigned short flags; /* if giaddr!=0,client flags*/

struct in_addr ciaddr; /* client IP address */

struct in_addr yiaddr; /* ’your’ IP address */

struct in_addr siaddr; /* server IP address */

struct in_addr giaddr; /* gateway IP address */

unsigned char chaddr[16]; /* client hardware address */

unsigned char sname[64]; /* server host name */

unsigned char file[128]; /* boot file name */

unsigned char options[312]; /* options area */

};

DHCP Option Numbers

The DHCP/BootP options discussed above correspond to the option numbers in RFC1533 as follows:

Number Tag Description

1 sm Subnet Mask

2 to Time Offset

3 gw Gateways

4 ts Time Servers

5 ns IEN 116 Name Servers

6 ds Domain Name Servers

7 lg Log Servers

8 cs Cookie Servers

9 lp LPR Servers

HP-UX Release 11i: December 2000 − 10 − Section 1M−−113

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