3.3 IKE Fragmentation Details
Using the notation as specified in [RFC2409] section 3.2, the generalized form of an IKE phase 1 exchange that is authenticated with signatures is as shown in the following figure, as a fragmentation example. For more information, see [RFC2409] section 5.
Figure 2: IKE phase 1 exchange
The description in this section uses the message numbers from the protocol sequence diagram.