Rolling Upgrade to 6.8.0

I have a cluster running at 6.6.2 (basic lic) and want to roll it up to 6.8.0. I'm seeing discovery timeouts after deploying the first 6.8.0 master node.

Does the upgrade to 6.8.0 require me to set settings specifically to allow the node to connect to the existing cluster? Atm, I have false set in my config...


Think I've found the issue. Rogue firewalling change in one part of our network. Being investigated...

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