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300-415 · Question #437
300-415 Question #437: Real Exam Question with Answer & Explanation
The correct answer is A: apply-policy site-list SpokeS control-policy TLOC-Policy out. Applying a TLOC control policy outbound toward spoke sites causes the vSmart to modify TLOC attributes in routes sent to spokes, making them prefer the public-internet circuit for hub-originated routes.
Policies
Question
Refer to the exhibit. The network team is implementing a TLOC policy in a network with a hub and spoke layout. The spoke sites must prefer their public-internet circuit for routes advertised by the hub site's WAN Edge with TLOC IP 10.101.1.1. Which configuration achieves this result?
Options
- Aapply-policy site-list SpokeS control-policy TLOC-Policy out
- Bapply-policy site-list Hub control-policy TLOC-Policy out
- Capply-policy site-list Hub control-policy TLOC-Policy in
- Dapply-policy site-list SpokeS control-policy TLOC-Policy in
Explanation
Applying a TLOC control policy outbound toward spoke sites causes the vSmart to modify TLOC attributes in routes sent to spokes, making them prefer the public-internet circuit for hub-originated routes.
Common mistakes.
- B. Applying the policy outbound to the Hub site-list would alter what the hub receives from other sites, not what the spoke sites receive from the hub, so spoke behavior would be unaffected.
- C. Applying the policy inbound to the Hub site-list affects routes being advertised by hub sites into the vSmart, changing what the vSmart stores rather than what the spokes receive.
- D. Applying the policy inbound to SpokeS affects routes that spoke sites advertise toward the vSmart, not the routes the spokes receive from the hub, leaving spoke routing preferences unchanged.
Concept tested. SD-WAN TLOC control policy direction for hub-spoke preference
Topics
#SD-WAN Control Policy#TLOC Policy#vSmart Policy Application#Hub-Spoke Topology
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