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INFORMATIONAL: …, N(CHANGE_PATH), N(NAT_DETECTION_*_IP), … Host A Background: A has addresses A1/A2, B has B1/B2 VPN gateway B INFORMATIONAL: … A decides to try some other pair PATH_TEST: … OK, IPsec traffic Host A decides to do dead peer detection (Note added after presentation) The figure has an error, the 1st informational exchange is retransmitted before the CHANGE_PATH message can be sent. |