mediumMultiple Choice
300-410 Practice Question: Configures a DMVPN spoke with the following:…
A network engineer configures a DMVPN spoke with the following:
interface Tunnel0 ip address 10.0.0.3 255.255.255.0 ip nhrp network-id 100 ip nhrp nhs 10.0.0.1
tunnel source GigabitEthernet0/0 tunnel mode gre multipoint
ip nhrp map 10.0.0.1 192.168.1.1 ip nhrp map multicast 192.168.1.1
!
What will happen when the spoke tries to send traffic to another spoke (10.0.0.4)?
⚠ Common exam trap
300-410 often tests the assumption that DMVPN spokes always communicate through the hub, confusing the role of static multicast maps with unicast traffic handling.
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 spoke will send traffic directly to 10.0.0.4 if it has a cached NHRP mapping, otherwise through the hub.
In DMVPN, a spoke can send traffic directly to another spoke if it has a cached NHRP mapping for that spoke's NBMA address. If no mapping exists, the spoke sends the packet to the hub (NHS), which then redirects it to the destination spoke and may send an NHRP resolution reply to the source spoke. The static multicast map only affects multicast traffic, not unicast. Thus, option A correctly describes the behavior.
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 spoke will send traffic directly to 10.0.0.4 if it has a cached NHRP mapping, otherwise through the hub.
Why this is correct
The spoke holds a static mapping only for the hub, so traffic to 10.0.0.4 initially goes through the hub. Once NHRP resolution returns 10.0.0.4's NBMA address, the spoke installs a shortcut and sends traffic directly, matching Phase 3 behaviour.
- ✗
The spoke will always send traffic through the hub because of the static multicast map.
Why it's wrong here
The static multicast map only affects multicast replication to the hub's NBMA address; unicast traffic to 10.0.0.4 still triggers NHRP resolution, and the hub's redirect then signals the spoke to build a direct tunnel. Multicast mapping would govern hub-and-spoke multicast forwarding, not unicast shortcut paths.
- ✗
The spoke will send traffic directly to 10.0.0.4 without using the hub.
Why it's wrong here
The spoke lacks 'ip nhrp redirect' on the hub and any shortcut configuration; without the hub signalling a traffic indication, the spoke keeps forwarding unicast through the hub rather than resolving 10.0.0.4 directly. Direct spoke-to-spoke tunnels require Phase 3 redirect and shortcut switching to be enabled.
- ✗
The spoke will drop the traffic because it does not have a route to 10.0.0.4.
Why it's wrong here
The tunnel interface's 10.0.0.0/24 address and NHRP registration provide reachability to 10.0.0.4; the spoke forwards the packet to the hub, which routes it onward. Dropping would only occur if no route or NHRP entry existed, which is not the case here.
Go deeper
Related to this question
Learn chapter
Advanced EIGRP Features (Stub, Load Balancing, Named Mode)
Key term
DMVPN Phase 2
DMVPN Phase 2 is an advanced Cisco routing technology that allows spoke routers to communicate directly with one another without sending traffic through a central hub, using dynamic routing protocols and multipoint GRE tunnels.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Cisco exam blueprint
This 300-410 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 300-410 exam.