Dual dynamic ISP with single VR

[mhm_ameen]

Hi , have 2 dynamic isp at site 1 with single vr and  ECMP and 1 public ip at site 2 paloalto at OCI cloud , i have setup dual tunnels from site 1 to site 2 but its not stable at all and most of times if we simulate failover using either path monitoring or tunnel monitoring we can see that vpn is stuck in initiating phase. We used below guide 

https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000POO0CAO 

[tcasw86]

To clarify, do you mean you are dynamic public IP with each ISP? If so are you using a domain name for OCI FW to peer to the site?

[mhm_ameen]

thx for reply, yes i have 2 dynamic ip at 1 site and public  ip at other site ,  not using domin name but using FQDN for dynamic peer  in ike gateway,  i will attach diagram. 

FQDN iam using is ip address is it ok or it must be in form of name.domain.com ?? 

[tcasw86]

With Dynamic Public IPs for the ISPs it would be preferable to use FQDNs and something like DynDNS to keep them update, otherwise every time your IPs change you will need to update the VPN peering, but that doesn't sound like the issue here.

Does the Tunnel ever establish on the failover ISP? Does Phase 1 establish, but not phase 2? Are you getting any log messages on either side of the tunnel indicating what the issue could be related to?