Белая книга для Cisco Cisco Virtual Topology System 1.5
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Virtual Topology System allows customers to achieve the full potential of their data center investments, providing
the capability to support multiple tenants, on demand, over the same underlying physical infrastructure. This
capability provides a scalable, high-performance network infrastructure for multi-tenant data centers that enables
simplicity, flexibility, and elasticity in both greenfield (new) and brownfield (existing) deployments.
Cisco Virtual Topology System Architecture Overview
At the core of the Virtual Topology System architecture are two main components: the policy plane and the control
plane. These perform core functions such as SDN control, resource allocation and core management functions
(Figure 2).
Figure 2. Cisco Virtual Topology System Architecture
Policy Plane
Virtual Topology System implements a robust policy plane that enables it to implement a declarative policy model
designed to capture user intent and render it into specific device-level constructs. The solution exposes a
comprehensive set of modular policy constructs that can be flexibly organized into user-defined services for
multiple use cases across service provider and cloud environments. These policy constructs are exposed through
a set of REST APIs that can be consumed by a variety of orchestrators and applications to express user intent, or
that can be instantiated through the Virtual Topology System GUI. Policy models are exposed as system policies or
service policies.