My ISP-given IPv6 (/57 for whatever reason) prefix is also stable, however beware that, at least on my OpenWRT based router, the option to release the prefix ba

My ISP-given IPv6 (/57 for whatever reason) prefix is also stable, however beware that, at least on my OpenWRT based router, the option to release the prefix back to the ISP when the router is shut down is checked by default. I discovered this when I rebooted for a firmware update and when it came back up my network had renumbered itself.