Oracle Exam 1Z0-1124-25 Topic 7 Question 6 Discussion

Actual exam question for Oracle's 1Z0-1124-25 exam

Question #: 6
Topic #: 7

You are configuring a VCN with multiple subnets for a customer. The security team requires that all instances have IPv6 addresses. You configure the VCN with an IPv6 ULA CIDR block of fc00:1:1::/48 and create two private subnets. After launching instances in the two private subnets, you notice that they only have IPv4 addresses assigned. You have not manually configured any IPv6 addresses on the instances themselves. What steps are necessary to ensure the instances automatically receive IPv6 addresses?

ANo further steps are needed. Instances will automatically receive IPv6 addresses within the configured subnets upon launch.

BEnsure that SLAAC (Stateless Address Autoconfiguration) is enabled on the operating system of the instances within the two subnets.

CIPv6 address assignment is only supported on instances launched in public subnets.

DMake sure the 'Assign public IPv4 address' option is not selected during instance creation. This will force the instance to default to IPv6 allocation.

Show Suggested Answer

Suggested Answer: B

Problem: Instances lack IPv6 addresses despite VCN IPv6 configuration.

OCI IPv6 Behavior: IPv6 requires subnet enablement and OS support via SLAAC.

Evaluate Options:

A: Incorrect. OCI doesn't auto-assign IPv6 without OS configuration.

B: Correct. SLAAC must be enabled on the instance OS for auto-assignment.

C: Incorrect. IPv6 works in both public and private subnets.

D: Incorrect. IPv4 and IPv6 assignments are independent.

Conclusion: Enabling SLAAC on the OS ensures automatic IPv6 assignment.

IPv6 in OCI relies on SLAAC for automatic address assignment. The Oracle Networking Professional study guide states, 'To enable IPv6 on instances, the VCN and subnet must have IPv6 CIDR blocks, and the instance OS must support SLAAC to automatically configure IPv6 addresses' (OCI Networking Documentation, Section: IPv6 Configuration). Without SLAAC, instances default to IPv4 only.

by Huey at Apr 09, 2025, 01:22 AM

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