300-415 · Question #409
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?
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.
Question
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
How the community answered
(57 responses)- A79% (45)
- B4% (2)
- C14% (8)
- D4% (2)
Why each option
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.
To make Site 2 prefer the MPLS circuit for reaching Site 1, a centralized route policy is used. The policy would match routes originating from or destined for Site 1 (or its TLOCs) with the 'MPLS' color. Setting a higher 'Preference' (e.g., 500) for these routes on Site 2 effectively makes the MPLS path more desirable than other paths.
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.
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.
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
Source: https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/sdwan-xe-cr-book/control-plane-components.html
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