300-415 Question #203: Real Exam Question with Answer & Explanation

The correct answer is D: route with higher TLOC preference value. When multiple OMP routes have equal preference values, the WAN Edge router selects the route with the higher TLOC preference value as a tie-breaker.

WAN Edge Router Deployment

Question

Which OMP route is selected for equal OMP route preference values on WAN Edge routers?

Options

Aroute with origin type of connected
Broute with origin type of static
Croute with lower TLOC preference value
Droute with higher TLOC preference value

Explanation

When multiple OMP routes have equal preference values, the WAN Edge router selects the route with the higher TLOC preference value as a tie-breaker.

Common mistakes.

A. While "connected" is a preferred origin type (lower value), this criterion is applied before the TLOC preference if OMP route preferences for other attributes are equal.
B. "Static" is an origin type, which is also considered before TLOC preference as a tie-breaker, assuming other OMP route preferences are equal.
C. The OMP route selection algorithm explicitly prefers a higher TLOC preference value, not a lower one, when other route attributes are equal.

Concept tested. Cisco SD-WAN OMP Route Selection Algorithm

Reference. https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/sdwan-xe-gs-book/sdwan-routing-book/sdwan-routing-book_chapter_01.html#_OMP_Best_Path_Selection_Algorithm

Topics

#OMP#Route selection#TLOC preference#WAN Edge

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