topic Re: Dual dynamic ISP with single VR in Next-Generation Firewall Discussions

Dual dynamic ISP with single VR

mhm_ameen — Fri, 26 Aug 2022 09:49:03 GMT

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

Re: Dual dynamic ISP with single VR

tcasw86 — Mon, 29 Aug 2022 22:52:44 GMT

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?

Re: Dual dynamic ISP with single VR

mhm_ameen — Tue, 30 Aug 2022 07:03:35 GMT

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 ??

Re: Dual dynamic ISP with single VR

tcasw86 — Tue, 30 Aug 2022 17:42:54 GMT

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?