What is the main purpose of the Cisco SD-Access underlay design?

The correct answer is D. to optimize network traffic routing and load-balancing. In Cisco SD-Access, the underlay is the physical IP network that interconnects all fabric nodes (edge, border, and control-plane nodes). It is purpose-built to provide fast-converging, loop-free, and load-balanced IP transport for the VXLAN overlay tunnels that carry user…

Advanced Enterprise Campus Networks

Question

Options

Ato enable automated network provisioning and configuration
Bto provide network segmentation and isolation for security
Cto support advanced firewall and IPS features
Dto optimize network traffic routing and load-balancing

How the community answered

(38 responses)

B
3% (1)
C
5% (2)
D
92% (35)

Explanation

In Cisco SD-Access, the underlay is the physical IP network that interconnects all fabric nodes (edge, border, and control-plane nodes). It is purpose-built to provide fast-converging, loop-free, and load-balanced IP transport for the VXLAN overlay tunnels that carry user traffic. Cisco recommends IS-IS as the underlay routing protocol and ECMP (Equal-Cost Multi-Path) for load distribution across multiple paths. Automated provisioning (option A) belongs to the management plane (DNA/Catalyst Center). Network segmentation and security (option B) are handled by the overlay using VNs and SGTs. Advanced firewall/IPS features (option C) are not a function of the underlay at all.

Topics

#SD-Access Underlay#Network Routing#Load Balancing#Campus Network Design

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