119 \item \verb|tunnel| --- tunnel over IP
2344 \section{{\tt ip tunnel} --- tunnel configuration}
2347 \paragraph{Abbreviations:} \verb|tunnel|, \verb|tunl|.  argument
2349 \paragraph{Object:} \verb|tunnel| objects are tunnels, encapsulating  argument
2356 over IP and the \verb|ip tunnel| command can be found in~\cite{IP-TUNNELS}.
2358 \subsection{{\tt ip tunnel add} --- add a new tunnel\\  argument
2359 	{\tt ip tunnel change} --- change an existing tunnel\\
2360 	{\tt ip tunnel delete} --- destroy a tunnel}
2372 --- select the tunnel device name.
2376 --- set the tunnel mode. Three modes are currently available:
2381 --- set the remote endpoint of the tunnel.
2404 --- bind the tunnel to the device \verb|NAME| so that
2410 --- disable Path MTU Discovery on this tunnel.
2447 \paragraph{Example:} Create a pointopoint IPv6 tunnel with maximal TTL of 32.
2453 \subsection{{\tt ip tunnel show} --- list tunnels}  argument
2466 The line starts with the tunnel device name followed by a colon.
2467 Then the tunnel mode follows. The parameters of the tunnel are listed
2468 with the same keywords that were used when creating the tunnel.
2484 to reflect that they are tunnel specific.
2487 because of checksum failures for a GRE tunnel with checksumming enabled.
2489 because they arrived out of sequence for a GRE tunnel with
2492 received on a broadcast GRE tunnel.
2494 transmitted because the tunnel is looped back to itself.