davidjumani commented on issue #5202:
URL: https://github.com/apache/cloudstack/issues/5202#issuecomment-884850858


   If I'm understanding this correctly, other existing pvlans (in vmware) were 
created as isolated in cloudstack as that's the only one that was supported at 
that time. If that's right, updating the isolated pvlans to community ones in 
the db via an upgrade path is not a good idea. Assuming there are isolated 
pvlans created in VMware and correctly created as isolated pvlans in 
cloudstack, a db upgrade would change them to community ones which is 
incorrect. Imo, since full-fledged pvlans is a new feature, the user will need 
to manually upgrade it, or allow editing the pvlan via the update API (which is 
risky as KVM supports pvlans as well, and updating it will require reapplying 
the appropriate ovs rules on all the hosts for every vm on that network)


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