Is it possible to add ipv6 to a deployed Shared network?

##### ISSUE TYPE

* Other / Question

##### COMPONENT NAME

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Network
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##### CLOUDSTACK VERSION

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CloudStack 4.18.1.0
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##### CONFIGURATION

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Network in advanced core zone
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##### OS / ENVIRONMENT

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N/A
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##### SUMMARY

Can you tell me if it is possible to add ipv6 to a deployed Shared network in an advanced core zone if the fields related to ipv6 were not filled in during its creation. Perhaps this can be achieved by editing the database? The important point is that there are already deployed vms in the network and their operability should not be disturbed.

Start by reviewing CloudStack's handling of IPv6 fields for Shared networks in advanced core zones and how changes affect already deployed VMs. Determine whether a supported path exists without disrupting those VMs; done means documenting that procedure or confirming the limitation.

Written by the indexing model from the issue text.