Handling Tunnel Loops
Loops may occurs within a tunnel due to the following reasons:
- when the source IP of the datagram is same as the router's IP address in any of the interface.
- 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.
Read more about this topic: IP In IP
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—Stella Chess (20th century)
“It is the light
At the end of the tunnel as it might be seen
By him looking out somberly at the shower,
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Realizing that hope is something else, something concrete
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—John Ashbery (b. 1927)
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—Susan Faludi (20th century)