IP+Optical networking technology is key technology for high-performance backbone. Dynamic optical path cut through can create high-throughput as well as low power consumption network. Photonic Internet Lab. (PIL) is shooting for the leading edge photonic-GMPLS (Generalized Multi-protocol Label Switching) that utilizes wide-band, cost-effective photonic technology to implement IP-centric managed networks. PIL is a consortium for researching the GMPLS protocol and advancing a de facto standard in this area. The experimental results, new ideas, and protocols are contributed to standardization bodies such. This paper also describes some architecture of IP+optical router researching in Japan.