MTU value of the secure tunnel interface

This article describes the issue of the inet MTU value not reverting to its default value, when the inet MTU configuration is removed.

The default inet MTU for the secure tunnel interface is 9192. When modifying this value, you need to be aware of the following issue:

When inet MTU is configured at the same time as the interface family is configured, the inet MTU will change accordingly; however, it will not revert to the default value of 9192, when the inet MTU configuration is removed.

This issue does not occur, when the interface family is first configured and committed and then the inet MTU value is changed:

This is due to a bug that is related to the kernel interface update function.

If, in any case, the inet MTU of the secure tunnel interface does not revert to the default value of 9192, it can be explicitly configured:

 

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Prasanna

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