A wastewater plant wants dual underlays from each civic site so SCADA can prefer a private MPLS path while guest and SaaS can use public Internet. In Cisco SD-WAN design terms, what should planners assign to distinguish those transports?
Select an answer to reveal the explanation.
Short Explanation
Colors are name tags on the pipes leaving the plant—MPLS gets one tag, broadband another—so policies can prefer SCADA on the private pipe and guests on the public one. If both circuits wear the same color, the overlay cannot steer traffic by transport type. Site-IDs and OSPF PIDs are not substitutes for transport colors.
Full Explanation
Cisco SD-WAN identifies underlay attachments with TLOC colors that represent transport types such as mpls or biz-internet. Assigning distinct colors to dual circuits enables centralized and localized policies, AAR SLAs, and preference rules to treat paths differently. Collapsing both transports into one color removes that discrimination. Site-IDs identify sites, and underlay IGP process IDs are unrelated to overlay color design.