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Creating a Virtual Private Network |
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Example of Virtual Private Networks |
Note that the SPI value 0 is reserved to indicate that no security association exists. The set of SPI values in the range of 1 through 255 are reserved to the Internet Assigned Numbers Authority (IANA) for future use.
Note also that if you are going to have more than one active tunnel to the same target, you will need a different target SPI for each active tunnel.
Depending upon your security requirements for this tunnel, choose from among the following policies: