- A
The 'redistribute connected' command will redistribute all interfaces that are up/up, including loopback interfaces, unless filtered.
Correct. By default, 'redistribute connected' redistributes all active connected interfaces, including loopbacks, unless a route map or distribute list filters them out.
- B
To redistribute only specific connected interfaces, a route map with 'match interface' can be used with the 'redistribute connected' command.
Correct. A route map can match specific interfaces using 'match interface', allowing selective redistribution of connected routes.
- C
The 'redistribute connected' command requires a corresponding 'network' statement under the routing protocol to include those interfaces.
Why wrong: Incorrect. The 'redistribute connected' command works independently of 'network' statements. It redistributes all connected routes regardless of whether the interface is enabled under the routing protocol.
- D
Redistributing connected routes automatically includes the default route (0.0.0.0/0) if one is present.
Why wrong: Incorrect. The default route is not a connected route; it is typically a static or dynamic route. Redistributing connected routes does not include the default route.
- E
The 'redistribute connected' command is only available in OSPF and EIGRP, not in other routing protocols like RIP.
Why wrong: Incorrect. The 'redistribute connected' command is available in all major routing protocols, including RIP, OSPF, EIGRP, and IS-IS.
Quick Answer
The answer is that the two true statements are that a route map with 'match interface' can be used with the 'redistribute connected' command to filter specific interfaces, and that redistributing connected routes does not require a network statement under the routing protocol. This is correct because the 'redistribute connected' command injects all directly connected interfaces into the protocol by default, but a route map provides granular control by matching only desired interfaces, while the protocol itself does not need an explicit network statement for those prefixes to be advertised. On the Cisco CCNP ENARSI 300-410 exam, this concept tests your understanding of redistribution granularity and the common trap of assuming loopback interfaces are automatically included—they are not unless explicitly matched. A key memory tip is "match to catch, no net to forget," meaning use 'match interface' to catch specific links, and remember that no network command is needed for connected routes.
300-410 Route Redistribution Practice Question
This 300-410 practice question tests your understanding of route redistribution. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Which TWO statements about redistributing connected routes into a routing protocol are true? (Choose TWO.)
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 'redistribute connected' command will redistribute all interfaces that are up/up, including loopback interfaces, unless filtered.
Redistributing connected routes can be done explicitly with the 'redistribute connected' command or implicitly by using the 'redistribute static' command if a static route points to the interface. The 'redistribute connected' command does not require a network statement under the routing protocol. However, redistributing connected routes does not automatically include loopback interfaces unless they are explicitly matched or included. The 'default-information originate' command does not redistribute connected routes.
Key principle: OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
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 'redistribute connected' command will redistribute all interfaces that are up/up, including loopback interfaces, unless filtered.
Why this is correct
Correct. By default, 'redistribute connected' redistributes all active connected interfaces, including loopbacks, unless a route map or distribute list filters them out.
Related concept
OSPF neighbours must agree on key parameters.
- ✓
To redistribute only specific connected interfaces, a route map with 'match interface' can be used with the 'redistribute connected' command.
Why this is correct
Correct. A route map can match specific interfaces using 'match interface', allowing selective redistribution of connected routes.
Related concept
OSPF neighbours must agree on key parameters.
- ✗
The 'redistribute connected' command requires a corresponding 'network' statement under the routing protocol to include those interfaces.
Why it's wrong here
Incorrect. The 'redistribute connected' command works independently of 'network' statements. It redistributes all connected routes regardless of whether the interface is enabled under the routing protocol.
- ✗
Redistributing connected routes automatically includes the default route (0.0.0.0/0) if one is present.
Why it's wrong here
Incorrect. The default route is not a connected route; it is typically a static or dynamic route. Redistributing connected routes does not include the default route.
- ✗
The 'redistribute connected' command is only available in OSPF and EIGRP, not in other routing protocols like RIP.
Common exam traps
Common exam trap: OSPF can fail even when IP connectivity looks correct
OSPF neighbour formation depends on matching areas, timers, network type, authentication and passive-interface behaviour. Do not choose an answer only because the devices can ping.
Trap categories for this question
Command / output trap
Incorrect. The 'redistribute connected' command works independently of 'network' statements. It redistributes all connected routes regardless of whether the interface is enabled under the routing protocol.
Detailed technical explanation
How to think about this question
OSPF questions usually test the details that control adjacency and route selection. Read the neighbour state, area, router ID and interface configuration before deciding what is wrong.
KKey Concepts to Remember
- OSPF neighbours must agree on key parameters.
- Router ID selection can affect neighbour relationships and LSDB output.
- OSPF cost influences the preferred path.
- A route can appear in OSPF information but not become the installed route.
TExam Day Tips
- Check area mismatch first when OSPF adjacency fails.
- Review passive interfaces when a network is advertised but no neighbour forms.
- Use show ip ospf neighbor and show ip route clues carefully.
Key takeaway
OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Real-world example
How this comes up in practice
A network engineer at a university connects two campus buildings via a fibre link. Both routers run OSPF, but no adjacency forms — even though both routers can ping each other. The engineer finds one router is in area 0 and the other in area 1. OSPF adjacency requires matching area numbers, hello/dead timers, and network type. IP reachability alone is not enough.
What to study next
Got this wrong? Here's your next step.
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related 300-410 OSPF questions on adjacency and route selection.
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FAQ
Questions learners often ask
What does this 300-410 question test?
Route Redistribution — This question tests Route Redistribution — OSPF neighbours must agree on key parameters..
What is the correct answer to this question?
The correct answer is: The 'redistribute connected' command will redistribute all interfaces that are up/up, including loopback interfaces, unless filtered. — Redistributing connected routes can be done explicitly with the 'redistribute connected' command or implicitly by using the 'redistribute static' command if a static route points to the interface. The 'redistribute connected' command does not require a network statement under the routing protocol. However, redistributing connected routes does not automatically include loopback interfaces unless they are explicitly matched or included. The 'default-information originate' command does not redistribute connected routes.
What should I do if I get this 300-410 question wrong?
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related 300-410 OSPF questions on adjacency and route selection.
What is the key concept behind this question?
OSPF neighbours must agree on key parameters.
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Last reviewed: Jun 18, 2026
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