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https://issues.apache.org/jira/browse/VCL-961?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15419244#comment-15419244
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ASF subversion and git services commented on VCL-961:
-----------------------------------------------------

Commit 1756199 from [email protected] in branch 'vcl/trunk'
[ https://svn.apache.org/r1756199 ]

VCL-961
Updated Linux.pm::get_network_bridge_info to check if brctl command exists. 
Fixed bug where it returned 0 if the command was not installed and the caller 
was expecting a hash reference.

> VCL may clobber custom network configurations on Linux images
> -------------------------------------------------------------
>
>                 Key: VCL-961
>                 URL: https://issues.apache.org/jira/browse/VCL-961
>             Project: VCL
>          Issue Type: Improvement
>          Components: vcld (backend)
>    Affects Versions: 2.4.2
>            Reporter: Andy Kurth
>            Assignee: Andy Kurth
>             Fix For: 2.5
>
>
> During image capture, vcld recreates 
> /etc/sysconfig/network-scripts/ifcfg-eth0 and ifcfg-eth0 with a very simple 
> DHCP configuration.  This breaks things if the image creator configured a 
> bridged interface.
> The code should be updated to intelligently reconfigure these files when 
> enabling DHCP, leaving a bridge intact if configured.
> Any Red Hat 6.x and earlier based image is affected including CentOS 6.x.



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