Over the last few weeks we have seen a number of cases where RADIUS accounting is not working correctly. This is usually when we do an LNS switch or BT have a blip or some other case where there is a lot of traffic for connecting and disconnecting circuits.
We are going to be working on this to make the accounting much more robust, but it will take some time to track down the exact cause and may mean some changes on the LNSs (which originate the RADIUS accounting) as well.
The impact is that it can mean a line appears to be off line on the control pages when it is not, or shows the line status in an odd colour. In most cases it has the side affect of not metering usage and so giving customers free bandwidth.
We'll post more details when we have them.
We have made some changes today and they seem promising. It looks like we have managed to ensure RADIUS accounting is must more reliable. We'll be monitoring during the day.