easyMultiple Choice
300-410 Practice Question: The maximum number of VRFs that can be configured…
What is the maximum number of VRFs that can be configured on a Cisco IOS router?
⚠ Common exam trap
The trap is expecting a fixed numeric answer (256, 1024, unlimited) when Cisco IOS VRF limits are platform- and memory-dependent; candidates who memorize a single number from one platform get it wrong.
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
✓
Platform-dependent, typically limited by available memory.
The number of VRFs configurable on a Cisco IOS router is not a fixed protocol limit; it depends on the platform's hardware resources, primarily memory (and sometimes TCAM or specific platform ASIC limits). Cisco documents that the practical maximum varies by router model and IOS version, so the correct answer is that it is platform-dependent.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
256
Why it's wrong here
256 is not the documented Cisco IOS maximum; the recognised figure is 1024 on supported platforms. It is tempting because 256 appears as a limit for other IOS resources such as VLANs or route-map entries, which would be the right answer had the question asked about those instead.
- ✗
1024
Why it's wrong here
Cisco IOS supports 1024 VRFs only on certain high-end platforms, not as the general maximum; the standard figure is lower. It is tempting because it matches the 1024 limit quoted for some IOS XE hardware, which would be the right answer had the question specified that platform.
- ✓
Platform-dependent, typically limited by available memory.
Why this is correct
VRF count is not a fixed architectural ceiling; each VRF consumes routing table and memory resources, so the practical maximum depends on the hardware platform and its available RAM. This satisfies the question's request for the maximum by acknowledging that no universal numeric limit applies across Cisco IOS routers.
- ✗
Unlimited
Why it's wrong here
VRF count is bounded by platform memory and the routing table's per-VRF structures, so it is never unlimited. It is tempting because large routers support thousands of VRFs, making the ceiling feel irrelevant, and would be correct only if the question asked about logical interfaces rather than VRFs.
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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.