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Initial chapter dhcp

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chhan11 2017-06-01 09:58:07 +02:00
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\input{chapter/section/intervlanrouting}
\chapter{DHCP}
\input{chapter/section/dhcp}
\chapter{Protocols Layer 3}
\input{chapter/section/routednetwork}

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chapter/section/dhcp.tex Normal file
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\section{Process}
\fig{dhcp/dhcpdiscoverprocess}{dhcpdiscoverprocess}{DHCP Discover Process}
\subsection{DHCP Messages}
\begin{itemize}
\item \textbf{DHCPDECLINE:} Message sent from the client to the server that the address is already in use.
\item \textbf{DHCPNAK:} The server sends a refusal to the client for request for configuration.
\item \textbf{DHCPRELEASE:} Client tells a server that it is giving up a lease.
\item \textbf{DHCPINFORM:} A client already has an IP address but is requesting other configuration parameters that the DHCP server is configured to deliver such as DNS address.
\end{itemize}
\section{Example configuration}
\subsection{Cisco}
\begin{txt}
ip dhcp excluded-address 192.168.0.254
!
ip dhcp pool LAN-1-POOL-DHCP
network 192.168.0.0 255.255.255.0
default-router 192.168.0.254
lease 2 ! set in days
\end{txt}
When configuring a Layer 3 interface as a relay port for DHCP request for a subnet. Set the ip helper command on the interface with one \textit{or} more ip addresses.
\begin{txt}
interface GigabitEthernet 0/3
ip helper-address 192.168.220.220
ip helper-address 192.168.222.222
\end{txt}

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