The tunnel-protocol command specifies the tunnel encapsulation protocol.
The undo tunnel-protocol command restores the default encapsulation protocol (None).
| Parameter | Description | Value |
|---|---|---|
| gre | Set the tunnel encapsulation protocol to GRE. |
- |
| none | Set the encapsulation type on the tunnel interface to NONE. NONE is the initial setting of a tunnel interface, which means that no other encapsulation is used. |
- |
Tunnel interface is a logical interface for packet encapsulation. A new tunnel interface provides only packet encapsulation function and does not use any extra protocol (NONE) to encapsulate the packets. You can specify a protocol as the encapsulation protocol, such as GRE.
You must specify the tunneling protocol before specifying other parameters, such as source and destination tunnel addresses. Changing the encapsulation protocol of a tunnel will delete all other settings of the tunnel.