300-415 · Question #73
An engineer wants to track tunnel characteristics within a SLA-based policy for convergence. Which policy configuration will achieve this goal?
The correct answer is A. App-route policy. App-route policy monitors real-time tunnel SLA metrics such as latency, jitter, and packet loss to make forwarding decisions, making it the correct tool for SLA-based convergence.
Question
Options
- AApp-route policy
- BVPN membership policy
- CControl policy
- DData policy
How the community answered
(52 responses)- A75% (39)
- B4% (2)
- C8% (4)
- D13% (7)
Why each option
App-route policy monitors real-time tunnel SLA metrics such as latency, jitter, and packet loss to make forwarding decisions, making it the correct tool for SLA-based convergence.
App-route policy (Application-Aware Routing) continuously probes tunnel characteristics - latency, jitter, and loss - against configured SLA thresholds. When a tunnel fails to meet the SLA, the policy redirects traffic to a compliant tunnel, enabling SLA-driven convergence across the overlay fabric.
VPN membership policy controls which service VPNs are allowed to communicate over which TLOCs, not real-time tunnel SLA metrics.
Control policy influences OMP route advertisements and TLOC reachability at the control plane, but does not monitor or respond to real-time tunnel performance characteristics.
Data policy defines per-packet forwarding rules such as ACL matching or QoS marking, but does not track or react to tunnel SLA metrics.
Concept tested: App-aware routing SLA-based tunnel policy
Source: https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/policies/ios-xe-17/policies-book-xe/m-application-aware-routing.html
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