I dont know anything about Jumbo's in the context of IPSec - but in general, Jumbo's is only for SAN traffic, a packet larger than 1500 is generally not routable - so it makes sense to me that a large MTU will break any type of connectivity on layer 3 outside the local subnet and collision domain.

On 10/25/2013 2:56 AM, Paul Theodoropoulos wrote:
Just discovered purely by accident that if I configure my ethernet adapter to use 9k jumbo frames (same as my gb ethernet switch supports), Shrew will 'reliably' fail to establish any part of a connection. Reconfiguring the adapter to jumbo frames disabled restores ability to connect.

Odd. Thoughts?


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