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Type: Bug
Resolution: Unresolved
Priority: Undefined
Fix Version/s: None
Affects Version/s: 4.20
Component/s: HyperShift / OCP Virtualization
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Description of problem:

When a dual-stack HCP on KubeVirt is created the nodes are configured with "ipv6.method: dhcp" instead of "ipv6.method: auto" causing SLAAC to fail an nodes to not get the IPv6 address. And so CNI cannot start.

Version-Release number of selected component (if applicable):

4.20

How reproducible:

always

Steps to Reproduce:

    1. Install dual-stack HCP on KubeVirt
    2. Verify that connections on nodes are configured with "ipv6.method: dhcp"
    3.

Actual results:

IPv6 fail to get assigned via SLAAC, and CNI cannot start.

Expected results:

Nodes to be deployed with `ipv6.method: auto` as any other regular OpenShift installation.

Additional info:

A workaround exists and is to change the method and reboot the node. `nmcli con mod "Wired connection 1" ipv6.method auto`

links to

[KB Solution] 7138691

Assignee:: Felix Enrique Llorente Pastora

Reporter:: Christian Passarelli

QA Contact:: Yu Li

Need Info From:: None

Votes:: 0 Vote for this issue

Watchers:: 3 Start watching this issue

Created:: 2026/02/25 4:26 PM

Updated:: 2026/02/26 8:01 AM

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