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chapter/section/spanningtree.tex: Updated flexlinks

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chhan11 2017-05-29 09:13:24 +02:00
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chapter/section/spanningtree.tex
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@ -284,7 +284,15 @@ Cisco did on their part early on enhance the original spanning tree standard wit
\item Configured with 2 physical links with and active/backup configuration.
\item Enables convergence time of less than 50 milliseconds.
\end{itemize}
\item FlexLinks is good alternative to running STP in an environment with customers who you do \texit{not} want to run STP with. Fx. Service Provider/Enterprise/Datacenter environment.
\item FlexLinks is good alternative to running STP in an environment with customers who you do \textit{not} want to run STP with. Fx. Service Provider/Enterprise/Datacenter environment.
\item Preemtion for FlexLinks is \textit{not} enabled-by-default.
\begin{enumerate}
\item Detects link failure.
\item Moves any dynamic unicast MAC addresses learned on primary link to standby link.
\item Moves standby link to forwarding state.
\item Transmits dummy multicast packets over new active interface. {\small Dummy multicast packet format is as follows: \textbf{destination:} 01:00:0c:cd:cd:cd, \textbf{source:} MAC address of the hosts or ports on the newly active FlexLinks port}
\end{enumerate}
\item {\small \textbf{Note:}} Configuring FlexLinks outside of access layer switches can be very complex!
\end{itemize}
\end{itemize}