hardMultiple ChoiceObjective-mapped
300-410 Practice Question: Runs the following command to troubleshoot a BGP…
A network engineer runs the following command to troubleshoot a BGP Troubleshooting issue:
R1# show bgp ipv4 unicast 192.168.1.0/24
BGP routing table entry for 192.168.1.0/24, version 12 Paths: (2 available, best #2, table default) Advertised to update-groups: 1 Refresh Epoch 1 65001
10.1.1.2 from 10.1.1.2 (10.1.1.2)
Origin IGP, metric 0, localpref 100, valid, external Refresh Epoch 2 65002
10.2.2.2 from 10.2.2.2 (10.2.2.2)
Origin IGP, metric 0, localpref 100, valid, external, best
What does this output indicate?
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 path from AS 65002 is best due to a tie-breaking rule, such as lower neighbor router ID.
The output shows two paths with equal local preference and metric. The best path is from AS 65002, likely due to a tie-breaking rule such as lower router ID or older route. The path from AS 65001 is valid but not best.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Both paths are equally preferred, and BGP load-balances traffic.
Why it's wrong here
Only one path is marked as best; load-balancing requires multiple best paths.
- ✗
The path from AS 65002 is best because it has a higher local preference.
Why it's wrong here
Both paths have localpref 100, so local preference is equal.
- ✓
The path from AS 65002 is best due to a tie-breaking rule, such as lower neighbor router ID.
Why this is correct
When attributes are equal, BGP uses tie-breakers like lower router ID. The best path is from AS 65002.
- ✗
The path from AS 65001 is best because it was received first.
Why it's wrong here
The output shows the path from AS 65002 as best, not AS 65001.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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