[j-nsp] Radius accounting updates not working w/L2TP

[Jonas Frey]

Hello,

i am running 9.2R15 on a M7i acting as LNS.
I am trying to get accounting updates to work but apparently they are
never sent.

This is my config:
jonas at ffm1# show access         
radius-server {
    xx.xx.xx.xx {
        port 1812;
        accounting-port 1813;
        secret "xxxx"; ## SECRET-DATA
    }
}


profile access-ppp {
    accounting-order radius; 

<<--- This no longer is documentated anywhere? is this deprecated now?
If i drop this statement accounting doesnt work at all!
https://www.juniper.net/techpubs/software/junos/junos92/swconfig-system-basics/configuring-authentication-and-accounting-parameters.html#jN2949F
 -->>

    authentication-order radius;
    radius {
        authentication-server xx.xx.xx.xx;
        accounting-server xx.xx.xx.xx;
    }
    radius-server {
        xx.xx.xx.xx {
            accounting-port 1813;
            secret "xxxx"; ## SECRET-DATA
        }
    }
    accounting {
        order radius;
        update-interval 15;
    }
}


The documentation also says:
For L2TP, RADIUS authentication servers are configured at the [edit
access radius-server] hierarchy level. For more information about
configuring RADIUS authentication servers, see Configuring RADIUS
Authentication for L2TP.

But under [access radius-server] i have no option to set any
update-interval.

Are radius accounting (interim)-updates not supported for L2TP (yet)?

Regards,
Jonas Frey