@jonoldman
In a different location, I have Airtel Fiber Postpaid Connection with ZyXEL AOT5221ZY ONT.
IPv6 has been working fine from the start.
I believe this is direct connection from Airtel and not through a LCO, as this location is inside Chennai city proper.
I do not have either Static IPv4 or Bridge Mode enabled here as well.
In a different location, I have Airtel Fiber Postpaid Connection with ZyXEL AOT5221ZY ONT.
IPv6 has been working fine from the start.
I believe this is direct connection from Airtel and not through a LCO, as this location is inside Chennai city proper.
I do not have either Static IPv4 or Bridge Mode enabled here as well.