I have a site-to-site IPSec connectivity with Palo Alto gateway (PA-VM 8.0.5 on kvm hypervisor - CentOS 7 host) on one end as initiator and Vyatta OS based gateway on the other end as acceptor.
When IKEv2 and IPSec (and BGP) are in established state, and the Vyatta OS reboots, it takes about 6 minutes for PA-VM to detect outage and renegotiate IKEv2.
The IKE Crypto has "Key Lifetime" set to 8 hours.
1. What configuration needs to be done (or can be done) in PA-VM for IKE to negotiate sooner ? (Is it a good idea to set Key Lifetime param in IKE Crypto to 3 minutes ?)
2. What is the industry best practice for setting up site-to-site VPNs in order to minimize outages due to peer firewall going down ?
Thanks in advance.
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