Motorola WiNG 5 System Reference Manual page 168

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Figure 5-57 Profile Security - Remote VPN Server screen (IKEv2 example)
29. Select either the IKEv1 or IKEv2 radio button to enforce peer key exchanges over the remote VPN server using
either IKEv1 or IKEv2.
IKEv2 provides improvements from the original IKEv1 design (improved cryptographic mechanisms, NAT and