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Exams300-415Questions#222
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300-415 · Question #222

300-415 Question #222: Real Exam Question with Answer & Explanation

The correct answer is A: Basic Configuration tab. Graceful Restart for OMP: On. Overlay AS Number: 1. Graceful Restart Timer (seconds): 86400. Number of Paths Advertised per Prefix: 3. ECMP Limit: 4. Shutdown: No.. To ensure cached OMP routes are flushed after a specific duration following an OMP peer adjacency loss, OMP Graceful Restart must be enabled with the Graceful Restart Timer set to the desired period. Setting the timer to 86400 seconds will flush routes after 24 hours.

WAN Edge Router Deployment

Question

An enterprise is continuously adding new sites to its Cisco SD-WAN network. It must configure any cached routes flushed when OMP peers have lost adjacency. Which configuration allows the cached OMP routes to be flushed after every 24 hours from its routing table?

Options

  • ABasic Configuration tab. Graceful Restart for OMP: On. Overlay AS Number: 1. Graceful Restart Timer (seconds): 86400. Number of Paths Advertised per Prefix: 3. ECMP Limit: 4. Shutdown: No.
  • BBasic Configuration tab. Graceful Restart for OMP: On. Overlay AS Number: 24. Graceful Restart Timer (seconds): 600000. Number of Paths Advertised per Prefix: 2. ECMP Limit: 2. Shutdown: No.
  • CBasic Configuration tab. Graceful Restart for OMP: On. Overlay AS Number: 24. Graceful Restart Timer (seconds): 43200. Number of Paths Advertised per Prefix: 2. ECMP Limit: 2. Shutdown: No.

Explanation

To ensure cached OMP routes are flushed after a specific duration following an OMP peer adjacency loss, OMP Graceful Restart must be enabled with the Graceful Restart Timer set to the desired period. Setting the timer to 86400 seconds will flush routes after 24 hours.

Common mistakes.

  • B. A Graceful Restart Timer of 600000 seconds is significantly longer than 24 hours, therefore it does not meet the requirement of flushing routes after every 24 hours.
  • C. A Graceful Restart Timer of 43200 seconds is 12 hours, which does not meet the requirement of flushing routes after every 24 hours.

Concept tested. OMP Graceful Restart Configuration

Reference. https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/sdwan-xe-gs-book/sdwan-routing.html#concept_x3t_j2j_vnb

Topics

#OMP#Graceful Restart#SD-WAN Routing#Router Configuration

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