Answer-first summary for fast verification
Answer: Query the dynamic_routes/learned_routes/dropped_unique_destinations metric and review the regional routing_mode metric attribute.
To troubleshoot the issue of some on-premises destinations being unreachable from us-east4 after changes were made to advertise additional routes to us-west1, it's essential to check if any routes were dropped due to exceeding BGP session limits. The correct approach involves querying the `dynamic_routes/learned_routes/dropped_unique_destinations` metric to identify any dropped routes. Additionally, reviewing the `regional routing_mode` metric attribute is crucial because, in regional routing mode, each Cloud Router maintains its own route limits and tables. This means that if the routing mode is regional, the issue could be isolated to the us-east4 Cloud Router's session limit, explaining the unreachable destinations. Global routing mode, which aggregates routes across regions, would not account for the problem being specific to us-east4. Therefore, the correct answer is to query the `dynamic_routes/learned_routes/dropped_unique_destinations` metric and review the `regional routing_mode` metric attribute.
Author: LeetQuiz Editorial Team
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To troubleshoot potential route drops after advertising additional routes to us-west1, which caused some on-premises destinations to become unreachable from us-east4, what steps should you take?
A
Query the dynamic_routes/learned_routes/dropped_unique_destinations metric and review the global routing_mode metric attribute.
B
Query the dynamic_routes/learned_routes/unique_destinations_limit metric and review the global routing_mode metric attribute.
C
Query the dynamic_routes/learned_routes/any_dropped_unique_destinations metric and review the regional routing_mode metric attribute.
D
Query the dynamic_routes/learned_routes/dropped_unique_destinations metric and review the regional routing_mode metric attribute.
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