300-415 Question #409: Real Exam Question with Answer & Explanation

The correct answer is A: Router Centralized Policy > Topology > Sequence Rule Match Conditions Color List: MPLS Actions Accept Preference: 500. To make Site 2 prefer the MPLS circuit for reaching Site 1, a centralized route policy is configured to match routes destined for Site 1's TLOCs with the 'MPLS' color and set a higher preference for those paths.

Policies

Question

Refer to the exhibit. Site 2 prefers the MPLS circuit to reach site 1 and advertises the routes learned into service VPN. Which policy configuration achieves this?

Options

ARouter Centralized Policy > Topology > Sequence Rule Match Conditions Color List: MPLS Actions Accept Preference: 500
BTLOC Centralized Policy > Topology > Sequence Rule Match Conditions Originator: 10.10.1.1 Actions Accept Preference: 500
CTLOC Centralized Policy > Topology > Sequence Rule Match Conditions TLOC IP: 10.10.1.1 Color: mpls Encapsulation: IPSEC Actions Accept Preference: 500
DRoute Centralized Policy > Topology > Sequence Rule Match Conditions Site List: Actions Accept Site ID: 101 TLOC IP: 10.10.1.1 Color: mpls Encapsulation: IPSEC

Explanation

To make Site 2 prefer the MPLS circuit for reaching Site 1, a centralized route policy is configured to match routes destined for Site 1's TLOCs with the 'MPLS' color and set a higher preference for those paths.

Common mistakes.

B. Matching on 'Originator' IP address alone is not specific enough to prioritize a particular color (MPLS) for reaching Site 1 from Site 2; a TLOC policy or a route policy matching TLOC color is more appropriate for path selection.
C. While a TLOC Centralized Policy can influence TLOC properties, the objective of preferring a specific circuit for routes is better achieved by a route policy that modifies vRoute attributes like TLOC preference.
D. The syntax 'Actions Accept Site ID: 101' is incorrect for a route policy action; Site ID is typically a match condition, and preference is set directly as an action.

Concept tested. Cisco SD-WAN Centralized Route Policy for path preference

Reference. https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/sdwan-xe-cr-book/control-plane-components.html

Topics

#Cisco SD-WAN Policies#Centralized Control Policy#OMP Route Preference#Transport Color

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