350-601 Compute Practice Question
A Cisco UCS Manager administrator notices that a newly provisioned service profile is showing 'Config Error' for the vNIC. The vNIC is configured to use a dynamic MAC address from a pool that has no free addresses. What is the correct remediation?
⚠ Common exam trap
Cisco often tests the misconception that a 'Config Error' on a vNIC is due to hardware or association issues, leading candidates to choose reassociation or firmware upgrades, when the actual cause is a resource pool exhaustion that requires pool expansion.
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
✓
Add more MAC addresses to the MAC pool used by the vNIC
The 'Config Error' for the vNIC indicates that the dynamic MAC address assignment failed because the MAC pool is exhausted. Adding more MAC addresses to the pool resolves the issue by providing available addresses for the vNIC to consume, allowing the service profile to deploy successfully.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Add more MAC addresses to the MAC pool used by the vNIC
Why this is correct
Extending the pool provides available addresses for assignment.
- ✗
Upgrade the firmware on the Fabric Interconnect
Why it's wrong here
Firmware upgrade does not add MAC addresses.
- ✗
Change the vNIC to use a static MAC address
Why it's wrong here
Static assignment bypasses the pool but requires manual configuration.
- ✗
Reassociate the service profile to a different blade
Why it's wrong here
Reassociation does not free pool addresses.
Visual reference
Quick reference
Access Control Model Comparison
| Model | Acronym | Who Controls Access? | Best For |
|---|---|---|---|
| Discretionary Access Control | DAC | Resource owner | Small teams, file shares |
| Mandatory Access Control | MAC | System / security labels | Classified govt / military |
| Role-Based Access Control | RBAC | Administrator (via roles) | Enterprise environments |
| Attribute-Based Access Control | ABAC | Policy engine (user + resource attributes) | Fine-grained, dynamic policies |
| Rule-Based Access Control | RuBAC | System rules / ACLs | Firewall rules, network ACLs |
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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