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Conﬁguring the DHCP Server

7.4 Conﬁguring the DHCP Server

Important

Compaq recommends calling the TCPIP$DHCP_

SETUPCOMMANDS.COM procedure as part of the login process for

all users who are authorized to manage the DHCP server.

7.4.2 Conﬁguring DHCP and DNS/BIND to Assign Host Names

DHCP uses the following methods to assign a host name:

• By hardware address

When you specify this method, DHCP uses the host name suggested by a

client when the client sends out its initial boot request.

This method requires that both the DHCP and BIND servers are capable of

and conﬁgured for performing dynamic DNS updates.

To conﬁgure host name assignment using this method, see Section 7.4.2.1.

• By IP address

If you specify this method to assign host names, DHCP performs a BIND IP

address lookup to obtain a host name associated with the IP address. If the

lookup is successful, DHCP uses the host name returned by BIND. If the

lookup fails, DHCP creates a name from the NAMEPOOL. ﬁle.

This method requires that you manually assign an IP address to each host

and add A and PTR records to your DNS/BIND database.

To conﬁgure host name assignment using this method, see Section 7.4.2.2.

7.4.2.1 Dynamically Assigning Host Names

To conﬁgure DHCP to assign a host name dynamically, perform the following

steps:

1. Change the SERVER.PCY ﬁle (either manually or with the DHCP GUI) to

include the following statements:

name_service_updateable

assign_name_by_hwaddr

accept_client_name

dns_tracks_dhcp_lease

2. Conﬁgure a DNS/BIND server to accept dynamic updates from your DHCP

server. If you are running the DHCP server on multiple nodes, conﬁgure the

DNS/BIND server to accept dynamic updates from each of the nodes. Refer

to Section 5.3.6 for a discussion on how to conﬁgure DNS/BIND to accept

dynamic updates from DHCP.

3. Edit the DHCPCAP. ﬁle to add a domain name for all subnet entries for

which DHCP will perform dynamic DNS updates. To use the DHCP GUI to

add dynamic DNS updates for a domain, do the following:

a. Start the DHCP GUI as described in Section 7.5

b. Select the Subnets tab.

c. Select DHCP parameters from the drop down list

d. Add the domain name to the DNS Domain Name parameter.

Conﬁguring the DHCP Server 7–19