NoteHKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\<Interface-name>
| Data type | Range | Default value |
|---|---|---|
| REG_DWORD | 0 | 1 | 2 | 3 | 0 |
Determines which traffic types can be routed and forwarded on this interface.
| Value | Meaning |
|---|---|
| 0 | Permit unicast and multicast traffic. |
| 1 | Prohibit unicast traffic. |
| 2 | Prohibit multicast traffic. |
| 3 | Prohibit unicast and multicast traffic. |
Note
Because this entry affects forwarding and routes, a local application can transmit multicasts over an interface that does not permit them, if there are no other interfaces in the computer that are enabled for multicast, and there is a default route.