The automation tools used for the migration from NSX-V to NSX-T will cause a few changes to the formatting of the rules on your edge:
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Firewall Rules
NSX-V Edge Firewall
NSX-T Edge Firewall
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All source and destination networks or IP addresses will migrate to IP Sets for each Rule. The migration tools provided by Vmware do not create very human readable names, so you may wish to rename them. You can rename IP Set as you wish.
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NAT
NSX-V Edge NAT
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NSX-T Edge NAT
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If you use the Edge for DNS relay, change the DNS ip within each VM’s OS to special Listener IP. You can obtain it in DNS forwarder IP on Edge level (default value is 192.168.255.228).
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Shared networks
NSX-V Shared network
By default shared network will be accessible to all vDC in your organization
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NSX-T Shared network
Shared Network transformed into Datacenter Group with two participant vDC, Edge to which the network is connected will be add as Egress point
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DNS
During migration process will be changed DNS setting for Organization Network, if Primary DNS server = Gateway IP.
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