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https://issues.apache.org/jira/browse/CLOUDSTACK-10377?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Raf Smeets resolved CLOUDSTACK-10377.
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Resolution: Fixed
Merged in 4.11
> Nuage VSP regression fails in NetworksWithCleanup test since introduction of
> fix for CLOUDSTACK-9114 in ACS 4.11&master
> -----------------------------------------------------------------------------------------------------------------------
>
> Key: CLOUDSTACK-10377
> URL: https://issues.apache.org/jira/browse/CLOUDSTACK-10377
> Project: CloudStack
> Issue Type: Bug
> Security Level: Public(Anyone can view this level - this is the
> default.)
> Affects Versions: 4.12, 4.11.1.0
> Environment: ACS 4.11 or master with Nuage VSP 5.2.x
> Reporter: Raf Smeets
> Assignee: Frank Maximus
> Priority: Major
>
> Nuage VSP regression fails in NetworksWithCleanup test since introduction of
> fix for CLOUDSTACK-9114 in ACS 4.11&master
> In Nuage Networks QA regression cycle, cloudstackExpress is failing for
> master & 4.11 in expressrestartNetworksWithCleanup test.
> The error is Unable to create a deployment.
> Issue is caused by fixing
> https://issues.apache.org/jira/browse/CLOUDSTACK-9114
>
> Reason is that for non-redundant routers, a strategy was implemented where
> first a new VR is deployed, then old VR is powered-off/destroyed, and the new
> VR is again re-programmed. With this strategy, two identical VRs may be up
> for a brief moment (few seconds) where both can serve traffic, however the
> new VR performs arp-ping on its interfaces to update neighbours. After the
> old VR is removed, the new VR is re-programmed which among many things
> performs another arpping. The theoretical downtime is therefore limited by
> the arp-cache refresh which can be up to 30 seconds. In my experiments,
> against various VMware, KVM and XenServer versions I found that the downtime
> was indeed less than 30s, usually between 5-20 seconds. Compared to older ACS
> versions, especially in cases where VRs deployment require full volume copy
> (like in VMware) a 10x-12x improvement was seen.BUT NUAGE PLUGIN FAILS AS IP
> ADDRESS IS ALREADY IN USE.
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