Migrate to a new ISP with a new IP address space on the same gateway

[Agust]

Hello everyone!

ClusterVRRP R81.10 with  S2S VPN tunnels and C2S tunnels.

We are facing an implementation and wanted to make sure we can complete it.

The task is to migrate to a new ISP with a new IP address space on the same gateway.
The external VPN partners should only have to change to our new gateway IP
We have a cluster with VRRP, with 2 members who currently have ISP redundancy configured with 2 ISPs. We added a third ISP link and want to migrate all services to that link.
Our intention was to start migrating some S2S VPN tunnels to this new link, keeping the 3 ISPs with this primary-backup scheme.
Is this possible?
Our other question was if after moving forward with the migration of these S2S VPNs, we wanted to move forward with the migration of the C2S tunnels, we would have to make modifications in the client equipment and what would be the best way to deal with it.
Thank you.

[PhoneBoy]

It should be possible to do this, yes.
It is a matter of setting the Link Selection settings to set the IP based on the routing table and configuring your routing accordingly.

For C2S, I'm not exactly sure how that will work.
I do know that when clients connect after you've added the new interface that it will get updated in the topology.
However, usually only the Main/Link Selection IP can be used.
For this part, you might check with TAC.