I give this book 4 out of 5 stars because of its age. 2006, and its nearly 2010. With advancement in this protocol and the advent of GMPLS/GELS for ethernet control plane for Carrier Ethernet this books screams for a 2nd edition (even if in PDF format only). And perhaps a chapter giving a run down of GMPLS implementations by major vendors. Both those that supply network nodes and a control server, and those that build the control plane server only (like Soap Stone until Extreme Networks bought them).