Establish connection to a VNET via an ExpressRoute circuit
{"type": "microsoft.network/publicipprefixes", "apiversion": "2021-03-01", "name": "[parameters('publicipprefixname')]", "location": "[parameters('location')]", "sku": {"name": "standard", "tier": "regional"}, "properties": {"prefixlength": "[parameters('publicipprefixlength')]", "publicipaddressversion": "ipv4"}} 