This might work better?

manifests/interface.pp

@@ -24,7 +24,10 @@ define ipoib::interface(
     ipaddress            => $ipaddress,
     netmask              => $netmask,
     gateway              => $gateway,
-    type                 => 'InfiniBand',
+    type                 => $facts['os']['family'] ? {
+      'RedHat' => 'InfiniBand',
+      default => undef,
+    },
     domain               => $domain,
     dns1                 => $dns1,
     dns2                 => $dns2,