display interface tunnel

Function

The display interface tunnel command displays details of the tunnel interface.

Format

display interface tunnel [ interface-number ] [ | { begin | exclude | include } regular-expression ]

Parameters

Parameter	Description	Value
interface-number	specifies the number of the tunnel interface.	-
\|	filters information by using the regular expression.	-
begin	displays the outputs that begin with the regular expression.	-
exclude	displays the outputs that do not contain the matched string only.	-
include	displays the outputs that contain the matched string only.	-
regular-expression	specifies a regular expression string.	-

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

None

Example

# View information about the interfaces on the specified tunnel.

<sysname> display interface tunnel 1
Tunnel1 current state : UP
Line protocol current state : UP
Description : Tunnel1 Interface, Route Port
The Maximum Transmit Unit is 1500 bytes
Internet Address is 10.10.10.1/24
Encapsulation is TUNNEL, loopback not set
Tunnel source 10.1.1.1 (Tunnel0), destination 10.2.2.2
Tunnel protocol/transport GRE/IP, key disabled
keepalive disabled
Checksumming of packets disabled
    1554 packets input,  181176 bytes
    0 input error
    7741 packets output,  502180 bytes
    1495 output error

**Table 1** Description of the **display interface tunnel** command output
Item	Description
current state:	Indicates the current physical status of interfaces: Up: The interface is in the normal state. Administratively Down: The network administrator executes the shutdown command on the interface. In general, after a tunnel interface is created, its status at the physical layer is Up.
Line protocol current state:	Indicates the link protocol status: Up: The link layer protocol of the tunnel interface works normally. Down: The link layer protocol of the tunnel interface is abnormal.
Description	Indicates the description of the tunnel interface. The description can help the user to get familiar with the interface function.
The Maximum Transmit Unit is 1500	Indicates the MTUs of tunnel interfaces. By default, it is 1500. The packet larger than the MTU is fragmented before being sent. If non-fragmentation is configured, the packet is discarded.
Internet Address	Indicates that the IP address of the tunnel interface. The mask is 24 bits, that is, 255.255.255.0.
Encapsulation is TUNNEL	Indicates the encapsulation type of packets on a tunnel interface. Packet encapsulation protects a whole IP packet.
loopback not set	Indicates that the tunnel interface does not support loopback test.
Tunnel source	Indicates the source address of the tunnel.
destination	Indicates the destination address of the tunnel.
Tunnel protocol/transport GRE/IP	Indicates that the tunnel encapsulation protocol is the GRE protocol.
1554 packets input, 181176 bytes, 0 input error	Shows the total packets and bytes received on the interface and the total number of wrong packets.
7741 packets output, 502180 bytes, 1495 output error	Shows the total packets and bytes sent through the interface and the total number of wrong packets.