mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: Is troubleshooting a BGP route-map that is…
A network engineer is troubleshooting a BGP route-map that is supposed to set a community value on routes from a specific neighbor. The engineer configures a route-map with 'set community 100:100' and applies it inbound to the neighbor. After the configuration, the engineer checks the BGP table on the local router and sees that the routes do not have the community set. What is the most likely cause?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The neighbor is missing the 'send-community' command under the BGP neighbor configuration.
By default, BGP does not send or receive communities unless the 'neighbor send-community' command is configured. Even if the route-map sets the community, the router will not attach it to the routes unless the neighbor is configured to send communities.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The neighbor is missing the 'send-community' command under the BGP neighbor configuration.
Why this is correct
Correct because communities are not exchanged without this command.
- ✗
The route-map is applied outbound instead of inbound.
Why it's wrong here
Incorrect because the scenario says it is applied inbound.
- ✗
The community value 100:100 is reserved and cannot be used.
Why it's wrong here
Incorrect because 100:100 is a valid community value.
- ✗
The route-map has a 'match community' statement that is filtering the routes before the set command.
Why it's wrong here
Incorrect because the scenario does not mention a match community statement.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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