The correct answer is that the route 10.1.1.0/24 is locally originated and is the best path. This is confirmed by the presence of the keyword "sourced" in the BGP output, which specifically indicates the route was injected into BGP locally—typically via a network statement or redistribution—and the next hop of 0.0.0.0 with the router’s own IP (10.1.1.1) further proves local generation. The combination of "valid, sourced, best" means the route is usable, originated on this router, and selected as the optimal path for advertisement to peers. On the Cisco CCNP ENARSI 300-410 exam, interpreting show bgp for locally originated routes tests your ability to distinguish between routes learned from neighbors and those injected locally, a common pitfall where candidates mistake a next hop of 0.0.0.0 for a missing route rather than a local origin. Remember the memory tip: "Sourced says sourced here, not sourced from a peer"—if you see "sourced" and a next hop of 0.0.0.0, the route was born on this box.
300-410 BGP Troubleshooting Practice Question
This 300-410 practice question tests your understanding of bgp troubleshooting. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A network engineer runs the following command on Router R1:
R1# show bgp ipv4 unicast 10.1.1.0/24
BGP routing table entry for 10.1.1.0/24, version 2
Paths: (1 available, best #1, table default)
Advertised to update-groups:
1
Refresh Epoch 1
Local
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The route 10.1.1.0/24 is locally originated and is the best path.
The output shows a locally originated network (10.1.1.0/24) with next hop 10.1.1.1 (the router itself). It is marked as valid, sourced, and best, meaning it is injected into BGP and will be advertised to peers.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 route 10.1.1.0/24 was learned from an eBGP peer.
Why it's wrong here
The next hop is 0.0.0.0 and from 0.0.0.0, indicating it is locally originated, not learned from a peer.
✓
The route 10.1.1.0/24 is locally originated and is the best path.
Why this is correct
The output shows 'sourced' and 'best', meaning it is a local network that is the best path in the BGP table.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
The route 10.1.1.0/24 has a weight of 100.
Why it's wrong here
The weight is 32768, not 100. Local preference is 100.
✗
The route 10.1.1.0/24 is not being advertised to any peer.
Why it's wrong here
It is advertised to update-group 1, so it is being advertised.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 300-410 question in full detail.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 300-410 NAT questions on configuration and troubleshooting.
BGP Troubleshooting — This question tests BGP Troubleshooting — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: The route 10.1.1.0/24 is locally originated and is the best path. — The output shows a locally originated network (10.1.1.0/24) with next hop 10.1.1.1 (the router itself). It is marked as valid, sourced, and best, meaning it is injected into BGP and will be advertised to peers.
What should I do if I get this 300-410 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 300-410 NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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