netravnen/NetworkLabNotes
1
0
Fork 0
mirror of https://gitlab.com/netravnen/NetworkLabNotes.git synced 2024-12-26 21:07:55 +00:00
Code Releases Activity

Chapter 2 spanning tree BPDU filter updated

Browse source
This commit is contained in:
chhan11 2017-05-26 03:09:13 +02:00
parent 8cb7f1b541
commit 855db4d907
1 changed files with 6 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
chapter/section/spanningtree.tex
View file

@ -227,11 +227,16 @@ Cisco did on their part early on enhance the original spanning tree standard wit
\item Affects all active portfast enabled ports, which \underline{don't} have a BPDU port configuration.
\item If BPDU recieved on port, portfast and BPDU filter is disabled.
\item Sends \textbf{10} BPDUs on startup. If BPDU recieved in this timeframe \textit{same consequence as above} happens to the port.
\item \cliline{switch(config-if)# spanning-tree bpdufilter enable}
\end{enumerate}
\item B) per-port:
\begin{enumerate}
\item
\item Port ignores all recieved BPDUs.
\item Port sends no BPDUs.
\item \cliline{switch(config-if)# spanning-tree bpdufilter enable}
\end{enumerate}
\item Beware to \underline{only} enable BPDU filter on ports connected to end hosts. Consequence if not followed \underline{can} result in creating bridging loops.
\item Beware to \underline{only enable either} BPDU guard \textbf{\textit{or}} filter. \footnote{Cisco recommendation}
\end{itemize}
\item Root Guard
\begin{itemize}