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https://issues.apache.org/jira/browse/CLOUDSTACK-10220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16318451#comment-16318451
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ASF GitHub Bot commented on CLOUDSTACK-10220:
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wido opened a new pull request #2396: CLOUDSTACK-10220: Configure IPv4 alias on
VR regardless of IPv6
URL: https://github.com/apache/cloudstack/pull/2396
For some reason when a IPv6 address is present for a NIC IPv4 subnet aliases
are not configured on the VR.
This seems to be very old code (>5 yr) and written at a time when IPv6
wasn't implemented in CloudStack
Removing this additional evaluation in the if-statement works for us in
Basic Networking
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> IPv4 NIC alias is not added on Virtual Router in Basic Networking when NIC
> has IPv6 address
> -------------------------------------------------------------------------------------------
>
> Key: CLOUDSTACK-10220
> URL: https://issues.apache.org/jira/browse/CLOUDSTACK-10220
> Project: CloudStack
> Issue Type: Bug
> Security Level: Public(Anyone can view this level - this is the
> default.)
> Components: Management Server, Virtual Router
> Affects Versions: 4.10.0.0
> Environment: Basic Networking with IPv6 enabled
> Reporter: Wido den Hollander
> Assignee: Wido den Hollander
> Labels: basic-networking, ipv6, virtual-router
>
> When multiple IPv4 subnets are configured inside a POD with Basic Networking
> a NIC alias is created for the VR when a Instance starts and
> DhcpAccrossMultipleSubnets is supported.
> However, when the Instance has a IPv6 address this IPv4 alias is not created
> and prohibits the Instance from getting a IPv4 address
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