NSX-T Tier 0 Secondary Addresses

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We are converting from NSX-V to NSX-T. One issue we are struggling with is secondary network subnets on Tier 0 Gateways. We extend public IP space down to our tenants edge using the Tier 0 Gateway as their edge. In NSX-V we were able to simply register secondary addresses to the external interfaces and BGP worked perfectly.

 

So, in NSX-T, where do we register the secondary networks? If we attempt to do so on the Tier 0 interfaces, we receive an error that only one network may be assigned to each interface. If we try comma separated addresses, we receive an error for lack of CIDR/Subnet. There has to be a way to have multiple subnets on a Tier 0 Gateway right?

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