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https://issues.apache.org/jira/browse/CLOUDSTACK-10350?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16428203#comment-16428203
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Stephan Seitz commented on CLOUDSTACK-10350:
--------------------------------------------
Please refer to [https://github.com/apache/cloudstack/issues/2540]
> problem adding new shared network NIC to VM "A NIC with this MAC address
> exits for network:"
> --------------------------------------------------------------------------------------------
>
> Key: CLOUDSTACK-10350
> URL: https://issues.apache.org/jira/browse/CLOUDSTACK-10350
> Project: CloudStack
> Issue Type: Bug
> Security Level: Public(Anyone can view this level - this is the
> default.)
> Components: Network Devices
> Affects Versions: 4.11.0.0
> Reporter: Stephan Seitz
> Priority: Blocker
> Attachments: cloudstack-4.11.0-stephans-duplicate-nicaddress-fix.diff
>
>
> {color:#4c4c4c}After upgrading a working 4.9.2 setup to 4.11.0.0 we've
> noticed that we're unable to add a NIC (shared network) to a running VM via
> GUI.{color}
> {color:#4c4c4c}The Error is "A NIC with this MAC address exits for network:
> (uuid of the current (other NIC) network)"{color}
> {color:#4c4c4c}Using cloudmonkey and giving a self-computed MAC-address does
> not rise the error and works as expected.{color}
> {color:#4c4c4c}After digging into the code, I think I've found the problem,
> but am too bad in java to provide a sustainable fix.{color}
> {color:#4c4c4c}I've attached a patch which obviously (with own manual tests)
> fixes that issue by simply commenting out the respective codeblock.{color}
> {color:#4c4c4c}As far as I dug into the code, the third parameter of
> NicProfile is handled by {color}
> {color:#4c4c4c}NetUtils.long2Mac(NetUtils.createSequenceBasedMacAddress(ipVO.getMacAddress(),
> NetworkModel.MACIdentifier.value()){color}
> {color:#4c4c4c}inside{color}
> {color:#4c4c4c}NicProfileHelperImpl.java{color}
> {color:#4c4c4c}I assume createSequenceBasedMacAddress can handle null as MAC,
> but doesn't get called at all if {color}
> {color:#4c4c4c}_nicDao.findByNetworkIdAndMacAddress(networkId, macAddress)
> results != null if macAddress is null.{color}
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