Try nipper configuration assessment tool. It provides some very detailed
output for many devices though is lacking Juniper support right now.
Hopefully Nipper 2 will support JunOS. I haven't used it for
Foundry/Brocade yet but they are on the supported device list.
http://www.titania.co.uk/index.php?option=com_content&view=article&id=52&Itemid=58
Regards,
Dennis Usle