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    Topology of the Cloud CPE Centralized Deployment Model

    Figure 1 shows the topology of a scaled Cloud CPE Centralized Deployment Model. The service provider’s network contains a central network point of presence (POP) that connects to multiple regional POPs. Customer sites connect to the regional POP for their geographical location.

    Figure 1: Topology of the Cloud CPE Centralized Model

    Topology of the
Cloud CPE Centralized Model

    Each POP contains a Contrail Cloud Reference Architecture (CCRA), which provides a virtualized infrastructure manager (VIM) and the Network Functions Virtualization infrastructure (NFVI). Virtualized network functions (VNFs) also reside in each POP. The deployment uses one OpenStack Keystone on the primary Contrail configure and control node in the central POP. Contrail configure and control nodes in the regional POPs and redundant configure and control nodes in the central POP all reference the single OpenStack Keystone.

    Contrail Service Orchestration resides only on the CCRA in the central POP. Consequently, management and orchestration of all network services occurs in the central POP. The Contrail Service Orchestration components activate site-specific network services in the regional POP and activate central network services, such as caching services, in the central POP.

    Figure 2 shows the distribution of the nodes in the CCRAs in the regional POPs and the central POP for a deployment that offers both Contrail and Contrail Service Orchestration high availability.

    Figure 2: Architecture of Nodes in Regional POPs and Central POP for a Scaled Installation with High Availability

    Architecture of Nodes in Regional
POPs and Central POP for a Scaled Installation with High Availability

    Different sites for an enterprise might connect to different regional POPs, depending on the geographical location of the sites. Within an enterprise, traffic from a site that connects to one regional POP travels to a site that connects to another regional POP through the central POP. A site can connect to the Internet and other external links through either the regional POP or the central POP.

    Modified: 2016-05-31