CCNP Practice Question: Given the following SD-WAN CLI output on a Cisco…

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✓

  The route via 10.0.0.1 (biz-internet) is preferred because it has lower loss and latency.

  Why this is correct

  The SD-WAN OMP path-selection algorithm compares data-plane metrics such as loss, latency, and jitter for each transport tunnel, and a lower value is always preferred for loss and latency. Because the biz-internet path via 10.0.0.1 reports lower loss and lower latency than the 3G path via 10.0.0.2, it is selected as the active route. This metric-based choice is performed regardless of the underlying routing protocol used to transport the overlay.

• ✗

  The route via 10.0.0.2 (3g) is preferred because it has a higher latency, which indicates a more stable path.

  Why it's wrong here

  Higher latency does not indicate a more stable path; it is a negative performance metric that typically reflects longer physical distance, congestion, or cellular network impairments. SD-WAN treats latency together with loss and jitter as quality-of-service indicators, and it actively selects lower-latency paths to optimize application experience. The 3G path's higher latency, combined with its likely higher loss, makes it a poorer candidate, not a preferred one.

• ✗

  Both routes are equally preferred because OMP uses ECMP by default.

  Why it's wrong here

  OMP does not blindly load-balance between all advertised paths; it evaluates per-path attributes, including loss and latency, before deciding whether paths are equal-cost. Here the two routes have different loss and latency values, so they are not equal-cost and OMP will not use ECMP across them. ECMP in SD-WAN can apply only when multiple paths have the same calculated preference and metrics, which is not the case for the 10.0.0.1 and 10.0.0.2 routes.

• ✗

  The admin-distance of 250 indicates that these routes are learned via BGP.

  Why it's wrong here

  An administrative distance of 250 in a Cisco SD-WAN vEdge/Viptela environment is the default AD for OMP routes, not for BGP routes. BGP routes would carry an AD of 20 for eBGP-learned prefixes or 200 for iBGP-learned prefixes, neither of which matches 250. The route is therefore an OMP overlay route received from vSmart, and its AD tells you nothing about BGP involvement.