Lines Matching refs:tunnels
113 tunnel device \verb|tunl0| and another tunnels may be created with command
142 Standard Linux-2.2 kernel supports three flavor of tunnels,
156 \noindent All the kinds of tunnels are created with one command:
184 say that they are zero or wildcard. Two tunnels of one mode cannot
187 This restriction is relaxed for keyed GRE tunnels.}
189 Tunnels are divided to two classes: {\bf pointopoint} tunnels, which
191 to this destination, and {\bf NBMA} (i.e. Non-Broadcast Multi-Access) tunnels,
198 it with another devices. Certainly, the configuration of tunnels has
207 Protocol setup on pointopoint tunnels does not differ of configuration
211 NBMA tunnels are different. To route something via NBMA tunnel
249 with this option: tunnels with fixed ttl always make pmtu discovery.
253 \verb|ipip| and \verb|sit| tunnels have no more options. \verb|gre|
254 tunnels are more complicated:
281 which can be made with tunnels. Certainly, you may get short help page
287 Besides that, you may view list of installed tunnels with the help of command:
305 \section{Differences 2.2 and 2.0 tunnels revisited.}
316 local address \verb|S|, kernel searches for matching tunnels
328 not acknowledged by more specific tunnels.
332 to design tunnels in the way enforcing maximal route symmetry
336 \item In 2.2 you can monitor and debug tunnels with \verb|tcpdump|.
344 \section{Linux and Cisco IOS tunnels.}
346 Among another tunnels Cisco IOS supports IPIP and GRE.
369 \section{Interaction IPIP tunnels and DVMRP.}
371 DVMRP exploits IPIP tunnels to route multicasts via Internet.
373 IPIP tunnels listed in its configuration file automatically.
375 tunnels, created in this way, and tunnels created by \verb|ip tunnel|.
386 \section{Broadcast GRE ``tunnels''.}
422 it is strongly recommended to be used with GRE tunnels instead of ugly
424 by historical reasons broadcast mode is not supported by IPIP tunnels,
441 However, you should remember, that tunnels are {\em virtual} devices