mediumMultiple 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 bgp summary
BGP router identifier 10.1.1.1, local AS number 65001 BGP table version is 15, main routing table version 15 2 network entries using 288 bytes of memory 2 path entries using 160 bytes of memory 2/1 BGP path/bestpath attribute entries using 288 bytes of memory 0 BGP route-map cache entries using 0 bytes of memory 0 BGP filter-list cache entries using 0 bytes of memory BGP using 736 total bytes of memory BGP activity 4/2 prefixes, 4/2 paths, scan interval 60 secs
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd 10.1.12.2 4 65002 1023 1047 15 0 0 00:12:34 0 192.168.1.2 4 65003 0 0 0 0 0 never Active
Based on this output, what is the problem with the BGP session to 192.168.1.2?
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 BGP session to 192.168.1.2 has never been established and is in Active state, likely due to a lack of TCP connectivity.
The neighbor 192.168.1.2 is in Active state, meaning R1 is trying to establish a TCP connection but is not receiving a response. This could be due to reachability issues, incorrect AS number, or ACL blocking. The session has never been up (Up/Down: never).
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 reachable.
Why it's wrong here
Active state indicates TCP connection attempts are failing, which could be due to unreachability, but this is not the only possibility.
- ✗
The neighbor 192.168.1.2 is in Idle state due to a misconfigured AS number.
Why it's wrong here
Active state means the router is actively trying to connect, not Idle.
- ✓
The BGP session to 192.168.1.2 has never been established and is in Active state, likely due to a lack of TCP connectivity.
Why this is correct
Active state with 'never' uptime indicates the session has never come up, and R1 is actively trying to initiate the TCP connection.
- ✗
The BGP session to 192.168.1.2 is established but not exchanging prefixes.
Why it's wrong here
The state is Active, not Established, so no prefixes are exchanged.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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