Definitive MPLS Network Designs [Electronic resources] نسخه متنی

Design Objectives for the Globenet Network

The design objectives for the Globenet network include the following considerations:

Offer a rich set of Layer 3 MPLS VPN services to Globenet's international customers, including data (Unicast and Multicast), voice, and video with sophisticated QoS features and IPv6 support.

Ensure that Globenet's network design can cope with the expected growth of its Internet and VPN traffic and will scale appropriately.

Provide a highly available network that can provide fast convergence with minimal traffic impact on single network element failures such as links or nodes without any additional expense.

Minimize the recurring bandwidth cost and provide differentiated services by deploying various network optimization techniques where justified, such as traffic engineering and DiffServ, while maintaining reasonable network management and operational complexity.

Use the available bandwidth on the IP/MPLS network to carry ATM traffic with an equivalent quality of service where the traffic ratio of IP to ATM is high.

The rest of this chapter describes the design Globenet chose in terms of IPv4 and IPv6 Layer 3 MPLS VPN, ATM pseudowires, QoS, traffic engineering, network recovery, and VPOP. Special emphasis is given to the inter-AS and interprovider aspects of the design as far as VPN, QoS, and TE are concerned.