Since I've switched ISPs from Optimum to Frontier, it's looking like my closest tunnel server has changed from New York City to Ashburn Virginia. A quick traceroute to each shows NYC at 15ms and Ashburn at about 9ms. My reason for looking into this is that last night I noticed that there was a temporary problem with my link between my VA net egress and NYC tunnel servers. My ping times to Google, Yahoo, etc, shot up to 150ms. The problem is fixed this morning. And don't take my amateur's diagnosis on the location of the problem. But, it looks like it's probably worthwhile to change.
Q: When I change tunnel servers I also have to get a new /48?
This means renumbering the network which means renumbering the handful of static assignments that I've made.
Q: Can I keep two tunnels up for a weeks or two while I shake out potential problems?
When I've changed tunnel servers in the past it did involve renumbering.
I believe you can have multiple active tunnels.
Have a Peplink BR1 MAX PRO 5G gateway/router. It "TALKs" to T-Mobile at Home Towers (Business Account w/Static IPv4 address)"WAN" feed for my Home test lab LAN. (LTE & 5G). I just successfully installed HE Tunnel (dual stack also works :-) ) on my Windows 11 PRO for Workstation PC and am getting 10/10 green lights on IPv6 tests. Only took two years of procrastination to accomplish what turned out to by relatively trivially task.....OOooF! lol.
While this milestone is wonderful it is ONLY useful on that specific LAN PC client. Now I want to move/install the tunnel on the BR1 so that it applies on the WAN to feed the entire LAN. I need help with any specific configs applicable to the BR1.