Extra fields in accounting

I have a FreeRadius server, which is running two virtual servers that process requests from different wireless SSIDs. They are set to do accounting to a MySQL database. What I'd like to know is how to add an extra field to say which virtual server the request came from, so I can query on this field when I analyse my accounting records. Is there an easy way of doing this? Cheers, Jonathan ---------------------------- Jonathan Gazeley Systems Support Specialist ResNet | Wireless & VPN Team Information Services University of Bristol ----------------------------