Role of a Fusion Router in SD-Access Solution

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In an SD-Access (Software-Defined Access) solution, the fusion router plays an important role in providing connectivity between the campus fabric and external networks. The campus fabric is the underlying infrastructure of the SD-Access solution that provides automated network segmentation and policy-based access control to users and devices in the network.

The fusion router acts as the gateway between the campus fabric and the external networks, including the Internet and other WAN (Wide Area Network) connections. The router is responsible for forwarding traffic between the campus fabric and the external networks while maintaining the security and policy requirements of the SD-Access solution.

In addition to providing connectivity to external networks, the fusion router also performs route leaking between user-defined virtual networks and shared services. This allows traffic to be routed between different virtual networks while maintaining the segmentation and policy requirements of the SD-Access solution.

It's worth noting that while the fusion router may provide additional forwarding capacity to the fabric, this is not its primary role. Rather, its main function is to act as the gateway between the campus fabric and the external networks. Similarly, the fusion router does not act as a DNS server in the SD-Access solution, as this is typically handled by separate DNS servers within the network.

In summary, the role of the fusion router in an SD-Access solution is to provide connectivity between the campus fabric and external networks while maintaining the segmentation and policy requirements of the solution. Additionally, the router performs route leaking between user-defined virtual networks and shared services to enable traffic routing while maintaining segmentation and policy requirements.