Ipsec tunnel IKE v1 vs IKE vs2 + tunnel uptime

[Rostyslav Didus]

Hello guys.

I want to know who use IKE2 for ipsec.
I mean,is it really better and got more security features?
I got ipsec beetwen Fortigate 80F and Pfsense 2.4.5-RELEASE.

Second question is about tunnel uptime.
As I understood both sides of the tunnel in case Internet got down trying to bring up the tunnel for several times.

Lets imagine situation- internet was down for 12 hours.Is that mean tunnel won't bring up automatically?

[Rostyslav Didus]

@rostyslav-didus

4.For some reason after pfsense reboot,it doesn't bring up Chield SA entries.
Maybe,I haven't noticed some mark to bring it up automatically?