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Added DORA sentence to dhcp notes

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chhan11 2017-06-06 13:09:28 +02:00
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chapter/dhcp.tex
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@ -2,6 +2,14 @@
\section[DHCP Process]{Dynamic Host Control Protocol Process}
You can always remember the \gls{dhcp} handshake process by DORA\footnote{Discover, Offer, Request, Acknowledgement}:
\begin{enumerate}
\item DHCP\textbf{D}ISCOVER: Client request to get a lease.
\item DHCP\textbf{O}FFER: Server sends an offer to the client containing a \gls{ip}, domain name, and lease period.
\item DHCP\textbf{R}EQUEST: Client formally request to get the assignment from the server.
\item DHCP\textbf{A}CK: Server acknowledges the assignment to the client.
\end{enumerate}
\fig{dhcp/dhcpdiscoverprocess}{dhcpdiscoverprocess}{DHCP Discover Process}
\subsection[DHCP Messages]{Dynamic Host Control Protocol Messages}
@ -26,19 +34,19 @@
\subsection{Cisco}
\begin{txt}
ip dhcp excluded-address 192.168.0.254
!
ip dhcp pool LAN-1-POOL-DHCP
\begin{cisco}
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}
\end{cisco}
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
\begin{cisco}
interface GigabitEthernet 0/3
ip helper-address 192.168.220.220
ip helper-address 192.168.222.222
\end{txt}
\end{cisco}