In this paper1, we present a new approach to construct multicast trees in MPLS networks. This approach utilizes MPLS LSPs between multicast tree branching node routers in order to reduce forwarding states and enhance scalability. In our approach only routers that are acting as multicast tree branching node for a group need to keep forwarding state for that group. All other non-branching node ro...

This paper presents some experiences with Class of Service (CoS) translation in IP and MPLS based networks. IP provides CoS in the form of eight priority classes that can be used to distinguish between a variety of traffic types. Since most of the layer-2 technologies provide support for strict QoS, an appropriate translation from the coarse grained IP CoS to the finegrained layer-2 QoS is fund...

The 4th Generation wireless networks are expected to become the access network technology of preference and be fully connected to the Global IP core network. Meanwhile, Mobile Ad hoc Networks (MANET) are typically formed on a temporary basis, to serve some urgent communication needs or extend communications in hot spots that are beyond the transmission range of cellular infrastructures. MANETs ...

In this paper, we present an all-MPLS approach for UMTS 3G core networks. GTP-tunnel has been defined by 3GPP as the transport mechanism for UMTS. For each packet transmission, extra GTP, UDP, and IP headers (40-byte) are required. For short packets, such as VoIP payloads, transmission overhead is very high. Enhanced-GTP was proposed to eliminate the need for a GTP header. Since its operation m...

This paper proposes a management of DiffServ-over-MPLS transit network with BFD(Bidirectional Forwarding Detection)/OAM (operation, administration and maintenance) in ForCES (Forwarding and Control Element Separation) architecture for QoS-guaranteed DiffServ-over-MPLS traffic engineering. The proposed BFD and ForCES functions are implemented on Intel 2400 network processor, where BFD/OAM packet...

Increasing number of Internet users forced them to use popular services, television and telephone, to use the Internet as a medium to reach their customers. Organizations are now applying VoIP and MPLS for providing the convergence of voice and data communications over single network infrastructure. VoIP (Voice over Internet Protocol) usage all over their branches, this reduces a huge amount of...

Multi-Protocol Label Switching (MPLS) is an evolving network technology that has been used to provide Traffic Engineering and high speed networking. There has been current demand on Internet Service Providers, which support MPLS technology, to provide Quality of Service (QoS) guarantees and security. Fault tolerance is an important QoS factor that needs to be considered to maintain network surv...

This document provides an overview of the Operations, Administration, and Maintenance (OAM) toolset for MPLS-based transport networks. The toolset consists of a comprehensive set of fault management and performance monitoring capabilities (operating in the data plane) that are appropriate for transport networks as required in RFC 5860 and support the network and services at different nested lev...

Integration of two technologies, Mobile IP and MPLS has gained popularity now days over dynamic mobile environment. This technology i.e. Mobile MPLS ensures to provide high Quality of service (QoS) along with mobility management. However Mobile MPLS inherits a problem of triangle routing from Mobile IP. Hence this research proposes a technique to improve the route optimization in Mobile MPLS ne...

RFC 3270 defines how to support the Diffserv architecture in MPLS networks, including how to encode Diffserv Code Points (DSCPs) in an MPLS header. DSCPs may be encoded in the EXP field, while other uses of that field are not precluded. RFC 3270 makes no statement about how Explicit Congestion Notification (ECN) marking might be encoded in the MPLS header. This document defines how an operator ...