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https://issues.apache.org/jira/browse/CLOUDSTACK-9184?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15061426#comment-15061426
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Suresh Kumar Anaparti commented on CLOUDSTACK-9184:
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>From VMware KB:
vSphere 5.0 has introduced a new advanced option for static port binding called
Auto Expand. This port group property allows a port group to expand
automatically by a small predefined margin whenever the port group is about to
run out of ports.
With releases before the vSphere 5.0 version, users who choose static port
binding in their deployment must
manually manage how many distributed ports are required per distributed port
group. To reduce the
management effort involved with the static port-binding option, VMware
introduced the Auto Expand feature
as part of the vSphere 5.0 release. This capability automatically increases the
distributed port limits of the
distributed port group when it runs out of distributed ports. To enable this
feature, users must employ the
vSphere API command or vSphere MOB, as described in VMware knowledge base
article 1022312:
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1022312.
In vSphere 5.1, when users choose static port binding, the Auto Expand feature
is enabled by default. Users now
don’t have to worry about running out of distributed ports on distributed port
groups or running a script on
distributed port groups to manually enable the Auto Expand feature.
Before vSphere 5.0 (vSphere 4.0,4.1,etc): No Auto Expand feature.
vSphere 5.0: Auto Expand is disabled by default.
vSphere 5.1 and 5.5: the Auto Expand feature is enabled by default.
> [VMware] vmware.ports.per.dvportgroup global setting is not useful from
> vCenter 5.0 onwards
> -------------------------------------------------------------------------------------------
>
> Key: CLOUDSTACK-9184
> URL: https://issues.apache.org/jira/browse/CLOUDSTACK-9184
> Project: CloudStack
> Issue Type: Bug
> Security Level: Public(Anyone can view this level - this is the
> default.)
> Components: Management Server, VMware
> Affects Versions: 4.5.2
> Reporter: Suresh Kumar Anaparti
>
> CloudStack has a global config paramter vmware.ports.per.dvportgroup for
> setting the number of ports per dvportgroup of Distributed Virtual Switch
> (DVS) and this takes effect when the zone is created.
> Auto expand/shrink features adjusts the ports per dvportgroup value
> dynamically from ESX 5.0 release. So, even if we set this global setting,
> auto expand will take effect and the value configured at cloudstack is not
> useful anymore.
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