I've investigated this previously.
It doesn't appear possible with hotspot at this time, however pppoe sessions should automatically re-login on the new router as soon as the vrrp fallover takes place.
That's simply due to the fact that pppoe sessions are normally set to re-auth on any drops, whereas the hotspot login requires physical user intervention.
You could try to offer both hotspot and pppoe logins for your users to give them the choice, however the hotspot side of this is simply not possible without some sort of hack to force sessions to start on the hotspot without a user login.
Thought: If you wanted to enable the mac-address login you could try copying these between the routers every couple of minutes or something similar.
thx for re!!!
but i want any easy,
exable:
it is posible and easy to run script (ip hotspot active print count-only) on login and inform html page from txt file ??
thx
br