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300-410 Practice Question: In a DMVPN Phase 2 deployment using EIGRP as the…
In a DMVPN Phase 2 deployment using EIGRP as the routing protocol, what is the default hello timer value on the tunnel interface?
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
✓
5 seconds
EIGRP uses a default hello timer of 5 seconds on high-speed interfaces (including tunnel interfaces) and 60 seconds on low-speed interfaces. DMVPN tunnel interfaces are treated as high-speed by default.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
5 seconds
Why this is correct
Correct. EIGRP default hello timer on tunnel interfaces is 5 seconds.
- ✗
10 seconds
Why it's wrong here
Incorrect. 10 seconds is the default hello timer for OSPF on broadcast networks, not EIGRP.
- ✗
30 seconds
Why it's wrong here
Incorrect. 30 seconds is the default hello timer for OSPF on NBMA networks.
- ✗
60 seconds
Why it's wrong here
Incorrect. 60 seconds is the default hello timer for EIGRP on low-speed interfaces (T1 or slower).
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.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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