NetworkLabNotes/chapter/section/intervlanrouting.tex

\section{Vlan-to-vlan routing}

\myquote{}{Guidance and Understanding of the art of Layer 3 networks. Routing between different slash 24\tsq{s}.\\ \textit{Aka. Inter-vlan routing.}}

There are different ways to go \tsq{bout} Inter-vlan routing and doing it.

\begin{itemize}
    \item \textbf{Some are using:}
    \begin{enumerate}
        \item external router,
        \item switch virtual interfaces\footnote{\texttt{Switches interface -> Vlan interfaces}},
        \item routed ports\footnote{\texttt{Routed interface -> Subinterfaces}},
        \item bridge virtual interface\footnote{\texttt{L3 bridging interface}}
    \end{enumerate}
    \item \textbf{Ways to do it:}
    \begin{enumerate}
        \item router-on-a-stick if the network is running collapsed core or not have a distribution switch in the middle.
        \item (...)
    \end{enumerate}
\end{itemize}

\pagebreak

\subsection{Interface configs}

\subsubsection{Routed interfaces}

\begin{txt}
interface GigabitEthernet 0/1.10
 encapsulation dot1q 10
 ip address 192.168.0.1 255.255.255.128
!
interface GigabitEthernet 0/1.20
 encapsulation dot1q 20
 ip address 192.168.0.129 255.255.255.128
\end{txt}

\subsubsection{Switches interfaces}

\begin{txt}
interface Vlan10
 ip address 192.168.1.1 255.255.255.128
!
interface Vlan20
 ip address 192.168.1.129 255.255.255.128
!
interface GigabitEthernet 0/2
 switchport mode trunk
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 10,20
\end{txt}