This is a very nice piece of software for building automated maps of your
network. You can do it online or feed it all your saved config files from
a directory and it will auto-build OSPF and BGP or EIGRP maps of your
network. It helped me spot one place where we forgot to turn on PIM. The
map is dynamic and you can move your routers around and the links move with
the shift on the map. It also flags routers that are missing a connection
from the other end.