Knowledge Base ISC Main Website Ask a Question/Contact ISC
Where to find ISC DHCP documentation?
Author: ISC Support Reference Number: AA-00333 Views: 133349 Created: 2011-05-16 20:46 Last Updated: 2017-03-16 11:44 100 Rating/ 1 Voters

Documentation for the ISC DHCP software includes the README file, the RELNOTES file, and the manual pages. The README file includes late-breaking operational and system-specific information that you should read even if you don't want to read the manual pages, and that you should *certainly* read if you run into trouble. Internet standards relating to the DHCP protocol are stored in the doc subdirectory (included with the source). You will have the best luck reading the manual pages if you build this software and then install it, although you can read them directly out of the distribution if you need to.

DHCP server documentation is in the dhcpd man page. Information about the DHCP server lease database is in the dhcpd.leases man page. Server configuration documentation is in the dhcpd.conf man page as well as the dhcp-options man page. A sample DHCP server configuration is in the file server/dhcpd.conf (in the source).

DHCP Client documentation is in the dhclient man page. DHCP client configuration documentation is in the dhclient.conf man page and the dhcp-options man page. The DHCP client configuration script is documented in the dhclient-script man page. The format of the DHCP client lease database is documented in the dhclient.leases man page.
In addition, the dhcp-options man page should be referred to for information about DHCP options.

DHCP relay agent documentation is in the dhcrelay man page.

To read installed manual pages, use the man command. Type "man page" where page is the name of the manual page.

© 2001-2018 Internet Systems Consortium

For assistance with problems and questions for which you have not been able to find an answer in our Knowledge Base, we recommend searching our community mailing list archives and/or posting your question there (you will need to register there first for your posts to be accepted). The bind-users and the dhcp-users lists particularly have a long-standing and active membership.

ISC relies on the financial support of the community to fund the development of its open source software products. If you would like to support future product evolution and maintenance as well having peace of mind knowing that our team of experts are poised to provide you with individual technical assistance whenever you call upon them, then please consider our Professional Subscription Support services - details can be found on our main website.

Feedback 6
  • #
    [ Satheesh Kumar.C]: Binary version 2014-09-30 20:29

    Is that download file in tar a binary version - win32

  • #
    [Cathy Almond]: Re: Binary version 2014-10-01 12:09

    No - ISC does not ship pre-built binaries for ISC DHCP and also does not provide build instructions for Windows. Build instructions (excluding Windows environment) can be found in the README in the top directory of the ISC DHCP distribution tarballs.

    -- Editing to add, after some research on the matter, that there are several reasons why we don't offer instructions for building, or pre-built binaries for Windows, including the difficulty of porting the code for handling raw sockets. It's unlikely that without significant interest/demand that we would consider changing this stance. But we would of course, entertain requests with good business need/justification. These may be submitted here:

    -- Further editing to add, that there is *no* plan to port ISC DHCP to Windows environments. It's more likely that we'd consider doing this with ISC Kea, the new DHCP server in development, but there is no work currently under way and it is unlikely to be considered a high priority feature request.

  • #
    [ Jeff]: dhcp-4.1.1-31.P1.el6.src.rpm 2014-06-27 09:03

    Does dhcp-4.1.1-P1.tar.gz generated from dhcp-4.1.1-31.P1.el6.src.rpm is developmented by this community?

    could you give me some doc/paper or other info about the dhcp-4.1.1 version, I want to add some function to this version , thx!

  • #
    [Cathy Almond]: Re: dhcp-4.1.1-31.P1.el6.src.rpm 2014-07-01 11:03

    The versioning of the dhcp that you're using suggests that it's from a package maintained and distributed by your OS vendor, although there's no reason why you shouldn't download the latest ISC source code tarball and build DHCP yourself.

    Of note is that the version you mention is particularly old. The latest version of DHCP 4.1 distributed by ISC is 4.1-ESV-R9 and it contains many fixes and updates to improve functionality and stability over 4.1.1-P1. Alternatively, you might like to consider 4.2.6 or 4.3.0, both of which introduce new features. See:

    There is some documentation available in the source code tarball. If you'd like to engage in dialogue with ISC and other users/contributors, please consider subscribing to one or more of the following mailing lists:

    To submit a bug or feature request, or to contribute a patch, please follow the instructions here:

  • #
    [ baf]: Failover with ISC DHCP 2014-01-17 16:37

    pls send me docs Failover with ISC DHCP

  • #
    [Cathy Almond]: Re: Failover with ISC DHCP 2014-01-28 13:43

    Please see the following articles on ISC DHCP Failover. Further information can be found in the DHCP man pages, and the DHCP user community mailing list archives :

Quick Jump Menu