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Routing & Switching · Advanced

SD-WAN Color

A Cisco SD-WAN label on a transport interface (such as mpls, private1, biz-internet, lte) that identifies the transport type for tunnel building and policy.

Definition

Public colors (biz-internet, lte, public-internet, etc.) use post-NAT addresses for tunnels, while private colors (mpls, private1-6, metro-ethernet) use pre-NAT addresses. Policies such as application-aware routing reference colors.

Example

tunnel-interface / color mpls restrict

Exam tip

Choosing a private color for an Internet link can break tunnels through NAT.

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