I'm trying to replace an AS5300 with a 2811. One problem I encountered during this work is, that the 2811 doesn't recognise the "aaa preauth" command.
As I'm running a toll-free number over this device I have to reject unknown or unwanted numbers during the call setup phase to ovoid unnessesary costs. Picking up and then dropping the call is no alternative as the calls will be billed starting with the first second.
I would prefer authorizing the calls via the already existing radius server but would accept any working solution.
The 2811 is running with IOS 12.4(15)T9