Voice prefers MPLS. The backup color is down, strict is not set, and voice still flows on the remaining internet color. Loss on MPLS misses the class. Why does voice still flow?
Select an answer to reveal the explanation.
Short Explanation
You named a spare that is already dead, and you did not tell voice to hang up. You left strict off, so voice uses the best remaining color. The backup being down does not drop the calls when strict is not the action.
Full Explanation
Without the strict action, application-aware routing forwards on the best remaining tunnel when the preferred path misses the SLA. The backup color is down, so it cannot be used, and voice continues on the internet color that remains. That is expected. The backup color is not up. A zone-based deny would drop the calls or show a deny counter. It does not fail open into a remaining color because an SLA was missed. OMP has not withdrawn every color. Voice is flowing, so a color is up, and an administratively down color would not carry it. Exam caveat: if the requirement is to drop voice rather than use the internet color, add strict. Leaving it off means a degraded path is allowed. Operational check: the voice action should show no strict setting, the backup color should be down, and the internet color should show the voice traffic.