IP in IP - Handling Tunnel Loops

Handling Tunnel Loops

Loops may occurs within a tunnel due to the following reasons:

  1. when the source IP of the datagram is same as the router's IP address in any of the interface.
  2. when the source IP of the datagram is same as the tunnel end point.

In both the cases, the router MUST NOT tunnel datagram. Instead it should discard the datagram.

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    “You may raise enough money to tunnel a mountain, but you cannot raise money enough to hire a man who is minding his own business.”
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