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300-415 · Question #74

A policy is created to influence routing in the network using a group of prefixes. What policy application will achieve this goal when applied to a site list?

The correct answer is B. Control-policy. Control policy is applied to site lists and uses prefix lists to influence OMP route advertisement, making it the correct choice for prefix-based routing influence in the SD-WAN fabric.

Policies

Question

A policy is created to influence routing in the network using a group of prefixes. What policy application will achieve this goal when applied to a site list?

Exhibit

300-415 question #74 exhibit

Options

  • AVpn-membership policy
  • BControl-policy
  • CTloc-template
  • DApp-route policy

How the community answered

(30 responses)
  • B
    87% (26)
  • C
    3% (1)
  • D
    10% (3)

Why each option

Control policy is applied to site lists and uses prefix lists to influence OMP route advertisement, making it the correct choice for prefix-based routing influence in the SD-WAN fabric.

AVpn-membership policy

VPN membership policy determines which VPNs are reachable via which TLOCs; it does not use prefix groups to influence route advertisement.

BControl-policyCorrect

Control policy operates at the vSmart controller level and can be applied to site lists to filter or modify OMP route advertisements using prefix lists or other match conditions. This directly influences how routes are propagated across the SD-WAN overlay without affecting the data plane directly.

CTloc-template

TLOC-template is a configuration construct for defining TLOC attributes, not a policy application used to influence routing with prefix lists.

DApp-route policy

App-route policy tracks tunnel SLA metrics for application-aware forwarding decisions, not prefix-based route advertisement control.

Concept tested: Centralized control policy with prefix-based route influence

Source: https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/policies/ios-xe-17/policies-book-xe/m-centralized-policy.html

Topics

#SD-WAN Policies#Control Policy#Routing Manipulation#Prefix-based Routing

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