LocalNetworkGatewayCannotHaveEmptyAddressPrefixAndBgpSettings Error when setting up local network gateway

Question

Trying to setup a local network gateway and hitting this error:

LocalNetworkGatewayCannotHaveEmptyAddressPrefixAndBgpSettingsThe local network gateway /subscriptions/XXXXXX/resourceGroups/XXXXXX/providers/Microsoft.Network/localNetworkGateways/XXXXX cannot have both empty address prefix and empty BGP Settings.

All the XX are just obfuscations of my org's specifics. I'm not seeing a place wwhere i can set the address prefix, and I'm not setting up BGP. Not sure where to look next.

Answer 1

When I tried to create local network gateway I got the same error below:

LocalNetworkGatewayCannotHaveEmptyAddressPrefixAndBgpSettingsThe local network gateway /subscriptions/b83cxxxxxf/resourceGroups/imran-/providers/Microsoft.Network/localNetworkGateways/LNG1 cannot have both empty address prefix and empty BGP Settings.

This error usually occurs when the address space is set to None. No address space details or BGP settings are configured.

Make sure to add address space like below:

Now I am able to successfully create a local network gateway like below:

To view BGP setting while creating in advance tab you can see or once deployed, under configuration you can set shown below: