This book provides the reader with detail about the SR-OS implementation of BGP and how it can be used to provide infrastructure layer transport as well as being an enabler for services. In parallel these need to be provided with a sufficient level of protocol robustness, a high level of scalability, and the ability to re-converge quickly upon failure.For each feature/function that is covered an overview is provided of what the feature/function is, how it operates (using command line interface and debug outputs to aid that understanding), andhow it is configured, along with configuration examples. The book is intended for IP design and engineering communities. It is writtenas a one-stop reference on how to implement and configure a particular service and/or function.The basic operation of BGP as a path vector protocol is not discussedas it is assumed to be a pre-requisite. Familiarity with Alcatel-Lucents Service Routing Operating System(SROS) is not a requirement. Coverage includes:BGP MPLS IP VPN (Border Gateway Protocol/Multiprotocol Label Switching/Internet Protocol/Virtual Private Network)Using BGP in VPLS (Virtual Private LAN Service)BGP Signalling for VPWS (Virtual Private WAN Service)Labeling Unicast IPv4ReconvergenceMulticastGraceful Restart and Error HandlingSecurityIPv6 PE (Provider Edge) RouterEthernet VPN (E-VPN)