Attachment 847198 Details for Bug 1045705 – notes to Networking Guide 'Chapter 10. DHCP Servers'

notes to Networking Guide 'Chapter 10. DHCP Servers'

Chapter10-DHCP_Servers.txt (text/plain), 3.48 KB, created by Jiri Popelka on 2014-01-08 15:18:20 UTC

(hide)

Description:

Filename:

MIME Type:

Creator: Jiri Popelka

Created: 2014-01-08 15:18:20 UTC

Size: 3.48 KB

patch

obsolete

>10.2. Configuring a DHCP Server
>/usr/share/doc/dhcp-<version_number>/dhcpd.conf.sample  ->  /usr/share/doc/dhcp/dhcpd.conf.example
>
>10.2.1. Configuration File
>service dhcpd restart  ->  systemctl restart dhcpd
>/usr/share/doc/dhcp-<version_number>/dhcpd.conf.sample  ->  /usr/share/doc/dhcp/dhcpd.conf.example
>
>10.2.3. Starting and Stopping the Server
>/sbin/service dhcpd start -> systemctl start dhcpd
>/sbin/service dhcpd stop -> systemctl stop dhcpd
>
>> If more than one network interface is attached to the system, but the DHCP server should only be started on one of the interfaces, configure the DHCP server to start only on that device.
>> In /etc/sysconfig/dhcpd, add the name of the interface to the list of DHCPDARGS:
>> # Command line options here
>> DHCPDARGS=eth0
>> This is useful for a firewall machine with two network cards. One network card can be configured as a DHCP client to retrieve an IP address to the Internet.
>> The other network card can be used as a DHCP server for the internal network behind the firewall.
>> Specifying only the network card connected to the internal network makes the system more secure because users can not connect to the daemon via the Internet.
>> Other command line options that can be specified in /etc/sysconfig/dhcpd include:
>
>We don't use /etc/sysconfig/dhcpd anymore - it's still there but contains only comment why it's not used and how to do the above described now.
>You can use that comment instead of the above description.
>
>> Other command line options that can be specified in /etc/sysconfig/dhcpd include: 
>> -p ...
>> -f ...
>> -d ...
>
>I'd not enumerate all the options here. Simply mentioning that they are described in dhcpd(8) man page should be sufficient.
>
>10.2.4. DHCP Relay Agent
>
>> The DHCP Relay Agent listens for DHCP requests on all interfaces unless the interfaces are specified in /etc/sysconfig/dhcrelay with the INTERFACES directive.
>
>The same as with /etc/sysconfig/dhcpd, i.e. one needs to modify dhcrelay.service to add command line arguments.
>
>> To start the DHCP Relay Agent, use the command service dhcrelay start.
>
>service dhcrelay start -> systemctl start dhcrelay
>
>10.3. Configuring a DHCP Client
>
>I don't think we need this section at all.
>First - this chapter is called 'DHCP Servers' and second - configuration of dhcp client is done automatically by NetworkManager.
>
>10.4. Configuring a Multihomed DHCP Server
>
>> The DHCP daemon listens on all network interfaces unless otherwise specified.
>
>That's not true. If the interface's subnet is not specified on dhcpd.conf dhcpd won't listen on that interface.
>
>> Use the /etc/sysconfig/dhcpd file to specify which network interfaces the DHCP daemon listens on.
>> The following /etc/sysconfig/dhcpd example specifies that the DHCP daemon listens on the eth0 and eth1 interfaces:
>> DHCPDARGS="eth0 eth1";
>> If a system has three network interfaces cards â eth0, eth1, and eth2 â and it is only desired that the DHCP daemon listens on the eth0 card, then only specify eth0 in /etc/sysconfig/dhcpd:
>> DHCPDARGS="eth0";
>
>I'd simply remove this description because specifying subnets in dhcpd.conf should be sufficient.
>
>10.5. DHCP for IPv6 (DHCPv6)
>
>> However, the client and the server can only manage one protocol at a time
>
>client, server and relay agent can only manage one protocol at a time
>
>/usr/share/doc/dhcp-<version>/dhcpd6.conf.sample  ->  /usr/share/doc/dhcp/dhcpd6.conf.example
>/sbin/service dhcpd6 start  ->  systemctl start dhcpd6
>
>10.6.1. Installed Documentation
>
>/usr/share/doc/dhcp-<version>/  ->  /usr/share/doc/dhcp/

Actions: View

Attachments on bug 1045705: 847198