Candidates should also have had significant past experience with, and expertise in many of the following protocols & technologies: DWDM, T1/OTN, IPv4 & IPv6, TCP (internals & flow control), BGP, OSPF, HSRP/GLBP, PIMv2, IGMP, LDP, TACACS, IPSEC & VPNs, netflow, DNS, HTTP. Excellent network experience with the rollout of large DWDM networks and Optical network technologies, and experience with optical planning and modeling tools.