- A
All connected routes will be redistributed into EIGRP with a metric of 100.
Why wrong: Only routes matching the ACL (10.0.0.0/8) will be redistributed; others are denied by the ACL.
- B
Only connected routes with a prefix matching 10.0.0.0/8 will be redistributed into EIGRP with metric 100; all other connected routes are not redistributed.
The route-map matches the ACL, which permits only 10.0.0.0/8. The set metric applies to matched routes. The deny statement in the ACL causes other routes to be denied by the route-map.
- C
No routes will be redistributed because the route-map sequence number is not specified.
Why wrong: Route-map sequence numbers are optional; if omitted, the sequence number defaults to 10. The configuration is valid.
- D
The redistribution will fail because the route-map must specify a metric for EIGRP redistribution.
Why wrong: The route-map does specify a metric via set metric 100. Even if it didn't, redistribution would still occur but might require a default metric.
EIGRP Redistribution: Using Route-Map and ACL to Filter Connected Routes
This 300-410 practice question tests your understanding of device management. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
Given the following partial configuration on router R3:
ip access-list extended FILTER permit ip 10.0.0.0 0.255.255.255 any deny ip any any
! route-map RMAP permit 10 match ip address FILTER set metric 100 !
router eigrp 100
redistribute connected route-map RMAP
What is the effect of this configuration?
Quick Answer
The correct answer is that only connected routes with a prefix matching 10.0.0.0/8 will be redistributed into EIGRP with metric 100, while all other connected routes are excluded. This happens because the route-map RMAP, applied to the redistribute connected command, uses match ip address FILTER, which permits only the 10.0.0.0/8 range; any route not matching that ACL is implicitly denied, and since the ACL ends with a deny any any, no other connected routes pass through. On the Cisco CCNP ENARSI 300-410 exam, this scenario tests your understanding of how route-maps filter redistribution—specifically that a route-map used with redistribute connected does not automatically permit all routes; it only permits those matching the ACL, and the set metric command applies only to matched routes. A common trap is assuming the route-map’s permit statement alone allows all connected routes, but the ACL inside it controls the actual match. Memory tip: think of the route-map as a bouncer—only routes with the right “ID” (the ACL prefix) get in and receive the metric stamp.
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
Only connected routes with a prefix matching 10.0.0.0/8 will be redistributed into EIGRP with metric 100; all other connected routes are not redistributed.
The route-map RMAP uses the access-list FILTER to match only IP prefixes that fall within the 10.0.0.0/8 range (wildcard mask 0.255.255.255). When applied to the 'redistribute connected' command, only connected routes whose network address matches this prefix are redistributed into EIGRP with the set metric of 100. All other connected routes are implicitly denied by the route-map's deny ip any any statement, so they are not redistributed.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
All connected routes will be redistributed into EIGRP with a metric of 100.
Why it's wrong here
Only routes matching the ACL (10.0.0.0/8) will be redistributed; others are denied by the ACL.
- ✓
Only connected routes with a prefix matching 10.0.0.0/8 will be redistributed into EIGRP with metric 100; all other connected routes are not redistributed.
- ✗
No routes will be redistributed because the route-map sequence number is not specified.
Why it's wrong here
Route-map sequence numbers are optional; if omitted, the sequence number defaults to 10. The configuration is valid.
- ✗
The redistribution will fail because the route-map must specify a metric for EIGRP redistribution.
Why it's wrong here
The route-map does specify a metric via set metric 100. Even if it didn't, redistribution would still occur but might require a default metric.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the interaction between an access-list and a route-map in redistribution, where candidates mistakenly think the route-map applies to all routes or that the deny statement in the ACL blocks redistribution entirely, rather than understanding that the route-map's permit/deny logic controls which routes are redistributed.
Detailed technical explanation
How to think about this question
Under the hood, the 'redistribute connected route-map RMAP' command triggers a conditional redistribution: for each connected route, the route-map is evaluated in order of sequence numbers. The access-list FILTER uses a wildcard mask (inverse of subnet mask) to match the network portion, so 10.0.0.0 0.255.255.255 matches any prefix starting with 10 in the first octet, regardless of the remaining octets. A real-world scenario is when an organization wants to advertise only specific connected subnets (e.g., management or loopback networks) into EIGRP while keeping others (like user LANs) hidden from the routing domain.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A security administrator must allow nursing staff to reach a patient records server while blocking access from the guest Wi-Fi VLAN. After applying an extended ACL, traffic is still blocked from nursing workstations. The ACL was applied outbound instead of inbound on the wrong interface. Questions like this test ACL direction and placement rules.
Quick reference
Routing Protocol Comparison
| Protocol | Metric | Max Hops | Algorithm | Type |
|---|---|---|---|---|
| RIP v2 | Hop count | 15 | Bellman-Ford | Distance vector |
| OSPF | Cost (bandwidth) | Unlimited | Dijkstra (SPF) | Link state |
| EIGRP | Composite metric | Unlimited | DUAL | Hybrid |
| IS-IS | Cost | Unlimited | Dijkstra | Link state |
| BGP | Policy / attributes | Unlimited | Path vector | Path vector |
RIP's 15-hop limit makes it unsuitable for large networks. OSPF and EIGRP dominate modern enterprise deployments.
What to study next
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FAQ
Questions learners often ask
What does this 300-410 question test?
Device Management — This question tests Device Management — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Only connected routes with a prefix matching 10.0.0.0/8 will be redistributed into EIGRP with metric 100; all other connected routes are not redistributed. — The route-map RMAP uses the access-list FILTER to match only IP prefixes that fall within the 10.0.0.0/8 range (wildcard mask 0.255.255.255). When applied to the 'redistribute connected' command, only connected routes whose network address matches this prefix are redistributed into EIGRP with the set metric of 100. All other connected routes are implicitly denied by the route-map's deny ip any any statement, so they are not redistributed.
What should I do if I get this 300-410 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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