Question: what is ike version 1 and 2?
Answer: IKEv1 phase 1 negotiation aims to establish the IKE SA. This process supports the main mode and aggressive mode. ... IKEv2 uses two exchanges (a total of 4 messages) to create an IKE SA and a pair of IPSec SAs. To create multiple pairs of IPSec SAs, only one additional exchange is needed for each additional pair of SAs.