hardMultiple ChoiceObjective-mapped
300-410 Practice Question: Runs the following command on Router R1: R1# show…
A network engineer runs the following command on Router R1:
R1# show ip bgp neighbors 192.168.1.2 advertised-routes
BGP table version is 14, local router ID is 10.1.1.1 Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter, x best-external, a additional-path, c RIB-compressed, Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path *> 10.10.10.0/24 192.168.1.2 0 0 65001 i *> 10.20.20.0/24 192.168.1.2 0 0 65001 i
Total number of prefixes 2
Based on this output, what is a likely issue?
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 192.168.1.2 is not receiving all routes because a route-map is filtering them.
The output shows only two prefixes advertised to the neighbor, but the network likely has more routes. The route-map applied to the neighbor may be filtering routes. The correct answer identifies that a route-map is likely filtering out other prefixes.
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 192.168.1.2 is not receiving all routes because a route-map is filtering them.
Why this is correct
Only two prefixes are advertised; a route-map applied to the neighbor could be restricting the advertisement.
- ✗
The BGP session is down because there are no prefixes advertised.
Why it's wrong here
The session is up as prefixes are advertised.
- ✗
The router is not receiving updates from its peers.
Why it's wrong here
The output shows advertised routes, not received routes.
- ✗
The prefix-list is misconfigured and blocking all routes.
Why it's wrong here
Two routes are advertised, so not all are blocked.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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