Contents

Tunneling commands· 1

bandwidth· 1

default 1

description· 2

destination· 2

display interface tunnel 3

interface tunnel 7

mtu· 7

reset counters interface tunnel 8

shutdown· 9

source· 9

tunnel dfbit enable· 10

tunnel out-interface· 11

tunnel tos· 12

tunnel ttl 12

 

Tunneling commands

bandwidth

Use bandwidth to set the expected bandwidth for an interface.

Use undo bandwidth to restore the default.

Syntax

bandwidth bandwidth-value

undo bandwidth

Default

The expected bandwidth (in kbps) is the interface maximum rate divided by 1000.

Views

Tunnel interface view

Predefined user roles

network-admin

Parameters

bandwidth-value: Specifies the expected bandwidth, in the range of 1 to 400000000 kbps.

Usage guidelines

The expected bandwidth for an interface affects the link costs.

Examples

# Set the expected bandwidth for Tunnel 1 to 100 kbps.

<Sysname> system-view

[Sysname] interface tunnel 1

[Sysname-Tunnel1] bandwidth 100

default

Use default to restore the default settings for a tunnel interface.

Syntax

default

Views

Tunnel interface view

Predefined user roles

network-admin

Usage guidelines

	CAUTION: The default command might interrupt ongoing network services. Make sure you are fully aware of the impact of this command when you use it on a live network.

 

This command might fail to restore the default settings for some commands for reasons such as command dependencies or system restrictions. Use the display this command in interface view to identify these commands. Use their undo forms or follow the command reference to restore their default settings. If your restoration attempt still fails, follow the error message instructions to resolve the problem.

Examples

# Restore the default settings of Tunnel 1.

<Sysname> system-view

[Sysname] interface tunnel 1

[Sysname-Tunnel1] default

description

Use description to configure the description of an interface.

Use undo description to restore the default.

Syntax

description text

undo description

Default

The description of a tunnel interface is Tunnelnumber Interface, for example, Tunnel1 Interface.

Views

Tunnel interface view

Predefined user roles

network-admin

Parameters

text: Specifies a description, a case-sensitive string of 1 to 255 characters.

Usage guidelines

Configure descriptions for different interfaces for identification and management purposes.

You can use the display interface command to display the configured interface description.

Examples

# Configure the description of Tunnel 1 as tunnel1.

<Sysname> system-view

[Sysname] interface tunnel 1

[Sysname-Tunnel1] description tunnel1

Related commands

display interface tunnel

destination

Use destination to specify the destination address for a tunnel interface.

Use undo destination to restore the default.

Syntax

destination { ipv4-address | ipv6-address }

undo destination

Default

No tunnel destination address is configured.

Views

Tunnel interface view

Predefined user roles

network-admin

Parameters

ipv4-address: Specifies the tunnel destination IPv4 address.

ipv6-address: Specifies the tunnel destination IPv6 address.

Usage guidelines

The tunnel destination address must be the address of the receiving interface on the tunnel peer. It is used as the destination address of tunneled packets.

The destination address of the local tunnel interface must be the source address of the peer tunnel interface. The source address of the local tunnel interface must be the destination address of the peer tunnel interface.

Do not specify the same tunnel source and destination addresses for the tunnel interfaces on the same device.

Examples

# VLAN-interface 100 on Sysname 1 uses the IP address 193.101.1.1 and VLAN-interface 100 on Sysname 2 uses the IP address 192.100.1.1. Configure the source address 193.101.1.1 and destination address 192.100.1.1 for the tunnel interface on Sysname 1.

<Sysname1> system-view

[Sysname1] interface tunnel 1 mode gre

[Sysname1-Tunnel1] source 193.101.1.1

[Sysname1-Tunnel1] destination 192.100.1.1

# Configure the source address 192.100.1.1 and destination address 193.101.1.1 for the tunnel interface on Sysname 2.

<Sysname2> system-view

[Sysname2] interface tunnel 1 mode gre

[Sysname2-Tunnel1] source 192.100.1.1

[Sysname2-Tunnel1] destination 193.101.1.1

Related commands

display interface tunnel

interface tunnel

source

display interface tunnel

Use display interface tunnel to display tunnel interface information.

Syntax

display interface [ tunnel [ number ] ] [ brief [ description | down ] ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

tunnel [ number ]: Specifies a tunnel interface. The number argument specifies the tunnel interface number. The specified tunnel interface must have been created. If you do not specify the tunnel keyword, this command displays information about all interfaces on the device. If you specify the tunnel keyword without the number argument, this command displays information about all existing tunnel interfaces.

brief: Displays brief interface information. If you do not specify this keyword, the command displays detailed interface information.

description: Displays complete interface descriptions. If you do not specify this keyword, the command displays only the first 27 characters of interface descriptions.

down: Displays information about interfaces in the physical state of DOWN and the causes. If you do not specify this keyword, the command displays information about interfaces in all states.

Examples

# Display detailed information about Tunnel 1.

<Sysname> display interface tunnel 1

Tunnel1

Current state: UP

Line protocol state: UP

Description: Tunnel1 Interface

Bandwidth: 64kbps

Maximum transmission unit: 1476

Internet address: 10.1.2.1/24 (primary)

Tunnel source 2002::1:1 (Vlan-interface10), destination 2001::2:1

Tunnel TOS 0xC8, Tunnel TTL 255

Tunnel protocol/transport GRE/IPv6

    GRE key disabled 

    Checksumming of GRE packets disabled

Last clearing of counters: Never

Last 300 seconds input rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec

Last 300 seconds output rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec

Input: 0 packets, 0 bytes, 0 drops

Output: 0 packets, 0 bytes, 0 drops

Table 1 Command output

Field	Description
Tunnel1	Information about the tunnel interface Tunnel 1.
Current state	Physical link state of the tunnel interface: ·     Administratively DOWN—The interface has been shut down by using the shutdown command. ·     DOWN—The interface is administratively up, but its physical state is down (possibly because no physical link exists or the link has failed). ·     UP—The interface is both administratively and physically up.
Line protocol state	Data link layer state of the interface. The state is determined through automatic parameter negotiation at the data link layer. ·     UP—The data link layer protocol is up. ·     UP (spoofing)—The data link layer protocol is up, but the link is an on-demand link or does not exist. This attribute is typical of null interfaces and loopback interfaces. ·     DOWN—The data link layer protocol is down.
Description	Description of the tunnel interface.
Bandwidth	Expected bandwidth of the tunnel interface.
Maximum transmission unit	MTU of the tunnel interface.
Internet protocol processing: Disabled	The tunnel interface is not assigned an IP address and cannot process IP packets.
Internet address	IP address of the tunnel interface. The primary attribute indicates that the address is the primary IP address.
Tunnel source	Source address of the tunnel. If a source interface is specified for the tunnel interface, this field also displays the source interface in parentheses.
destination	Destination address of the tunnel.
Tunnel keepalive enabled, Period(50 s), Retries(3)	Keepalive is enabled for GRE. In this example, the keepalive interval is 50 seconds and the keepalive number is 3.
Tunnel TOS	ToS of tunneled packets.
Tunnel TTL	‌ TTL of tunneled packets.
Tunnel protocol/transport	Tunnel mode and transport protocol: ·     GRE/IP—GRE/IPv4 tunnel mode. ·     GRE/IPv6—GRE/IPv6 tunnel mode.
GRE key disabled	No GRE tunnel interface key is configured.
Checksumming of GRE packets disabled	The GRE packet checksum feature is disabled.
Last clearing of counters	Last time when counters were cleared.
Last 300 seconds input rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec	Average input rate in the last 300 seconds.
Last 300 seconds output rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec	Average output rate in the last 300 seconds.
Input: 0 packets, 0 bytes, 0 drops	Total input packets, total input bytes, and total input packets dropped.
Output: 0 packets, 0 bytes, 0 drops	Total output packets, total output bytes, and total output packets dropped.

 

# Display brief information about Tunnel 1.

<Sysname> display interface tunnel 1 brief

Brief information on interfaces in route mode:

Link: ADM - administratively down; Stby - standby

Protocol: (s) - spoofing

Interface            Link Protocol Primary IP     Description

Tun1                 UP   UP       1.1.1.1        Tunnel1

# Display brief information about Tunnel 1, including the complete interface description.

<Sysname> display interface tunnel 1 brief description

Brief information on interfaces in route mode:

Link: ADM - administratively down; Stby - standby

Protocol: (s) - spoofing

Interface            Link Protocol Primary IP     Description

Tun1                 UP    UP      1.1.1.1        Tunnel1

# Display information about interfaces in DOWN state and the causes.

<Sysname> display interface tunnel brief down

Brief information on interfaces in route mode:

Link: ADM - administratively down; Stby - standby

Interface            Link Cause

Tun0                  DOWN Not connected

Tun1                  DOWN Not connected

Table 2 Command output

Field	Description
Interface	Abbreviated interface name.
Link	Physical link state of the interface: ·     UP—The interface is physically up. ·     DOWN—The interface is physically down. ·     ADM—The interface has been shut down by using the shutdown command. To restore the physical state of the interface, use the undo shutdown command. ·     Stby—The interface is a backup interface in standby state. To see the primary interface, use the display interface-backup state command.
Protocol	Data link layer protocol state of the interface: ·     UP—The data link layer protocol of the interface is up. ·     DOWN—The data link layer protocol of the interface is down. ·     UP(s)—The data link layer protocol of the interface is up, but the link is an on-demand link or does not exist. The (s) attribute represents the spoofing flag. This value is typical of null interfaces and loopback interfaces.
Primary IP	Primary IP address of the interface. This field displays two hyphens (--) if the interface does not have an IP address.
Description	Description of the interface.
Cause	Cause for the physical link state of an interface to be DOWN: ·     Administratively—The interface has been manually shut down by using the shutdown command. To restore the physical state of the interface, use the undo shutdown command. ·     Not connected—The tunnel is not established.

 

Related commands

destination

interface tunnel

source

interface tunnel

Use interface tunnel to create a tunnel interface, specify the tunnel mode, and enter tunnel interface view, or enter the view of an existing tunnel interface.

Use undo interface tunnel to delete a tunnel interface.

Syntax

interface tunnel number [ mode gre [ ipv6 ] ]

undo interface tunnel number

Default

No tunnel interfaces exist.

Views

System view

Predefined user roles

network-admin

Parameters

number: Specifies the number of the tunnel interface. The value range is 0 to 1023. The number of tunnel interfaces that can be created is restricted by the total number of interfaces and the memory.

mode gre: Specifies the GRE/IPv4 tunnel mode.

mode gre ipv6: Specifies the GRE/IPv6 tunnel mode.

Usage guidelines

To create a new tunnel interface, you must specify the tunnel mode in this command. To enter the view of an existing tunnel interface, you do not need to specify the tunnel mode.

A tunnel interface number is locally significant. The tunnel interfaces on the two ends of a tunnel can use the same or different interface numbers.

Examples

# Create GRE/IPv4 tunnel interface Tunnel 1 and enter tunnel interface view.

<Sysname> system-view

[Sysname] interface tunnel 1 mode gre

[Sysname-Tunnel1]

Related commands

destination

display interface tunnel

source

mtu

Use mtu to set the MTU on a tunnel interface.

Use undo mtu to restore the default.

Syntax

mtu size

undo mtu

Default

If the tunnel interface has never been up, the MTU is 64000 bytes.

If the tunnel interface is up, its MTU is identical to the outgoing interface's MTU minus the length of the tunnel headers. The outgoing interface is automatically obtained through routing table lookup based on the tunnel destination address.

Views

Tunnel interface view

Predefined user roles

network-admin

Parameters

size: Specifies the MTU, in the range of 100 to 64000 bytes.

Usage guidelines

After you configure an MTU for a tunnel interface, the configured MTU applies regardless of the tunnel interface status (up/down) and the outgoing interface MTU.

To avoid fragmentation after tunnel encapsulation, set the tunnel interface MTU no greater than the value of the outgoing interface MTU minus the length of the tunnel headers.

Examples

# Set the MTU on Tunnel 1 to 1000 bytes.

<Sysname> system-view

[Sysname] interface tunnel 1

[Sysname-Tunnel1] mtu 1000

Related commands

display interface tunnel

reset counters interface tunnel

Use reset counters interface tunnel to clear tunnel interface statistics.

Syntax

reset counters interface [ tunnel [ number ] ]

Views

User view

Predefined user roles

network-admin

Parameters

tunnel [ number ]: Specifies a tunnel interface. The number argument specifies the tunnel interface number. If you do not specify the tunnel keyword, this command clears statistics for all interfaces. If you specify the tunnel keyword without the number argument, this command clears statistics for all tunnel interfaces.

Usage guidelines

Use this command to clear old statistics so you can observe new traffic statistics on a tunnel interface.

Examples

# Clear statistics for Tunnel 1.

<Sysname> reset counters interface tunnel 1

Related commands

display interface tunnel

shutdown

Use shutdown to shut down a tunnel interface.

Use undo shutdown to bring up a tunnel interface.

Syntax

shutdown

undo shutdown

Default

A tunnel interface is not administratively down.

Views

Tunnel interface view

Predefined user roles

network-admin

Usage guidelines

This command disconnects all links set up on the interface. Make sure you fully understand the impact of the command on your network.

Examples

# Shut down Tunnel 1.

<Sysname> system-view

[Sysname] interface tunnel 1

[Sysname-Tunnel1] shutdown

Related commands

display interface tunnel

source

Use source to specify the source address or source interface for a tunnel interface.

Use undo source to restore the default.

Syntax

source { ipv4-address | ipv6-address | interface-type interface-number }

undo source

Default

No source address or source interface is specified for a tunnel interface.

Views

Tunnel interface view

Predefined user roles

network-admin

Parameters

ipv4-address: Specifies the tunnel source IPv4 address.

ipv6-address: Specifies the tunnel source IPv6 address.

interface-type interface-number: Specifies the source interface by its type and number. The interface must be up and must have an IP address.

Usage guidelines

The specified source address or the address of the specified source interface is used as the source address of tunneled packets. To display the configured tunnel source address, use the display interface tunnel command.

Do not specify the same tunnel source and destination addresses for the tunnel interfaces on the same device.

The destination address of the local tunnel interface must be the source address of the peer tunnel interface. The source address of the local tunnel interface must be the destination address of the peer tunnel interface.

If you execute this command multiple times, the most recent configuration takes effect.

Examples

# Specify VLAN-interface 10 as the source interface of Tunnel 1.

<Sysname> system-view

[Sysname] interface tunnel 1 mode gre

[Sysname-Tunnel1] source vlan-interface 10

# Specify 192.100.1.1 as the source address of Tunnel 1.

<Sysname> system-view

[Sysname] interface tunnel 1 mode gre

[Sysname-Tunnel1] source 192.100.1.1

Related commands

destination

display interface tunnel

interface tunnel

tunnel dfbit enable

Use tunnel dfbit enable to set the Don't Fragment (DF) bit for tunneled packets.

Use undo tunnel dfbit enable to restore the default.

Syntax

tunnel dfbit enable

undo tunnel dfbit enable

Default

The DF bit is not set for tunneled packets.

Views

Tunnel interface view

Predefined user roles

network-admin

Usage guidelines

To avoid fragmentation and delay, set the DF bit for tunneled packets. Make sure the path MTU is larger than the tunneled packet length. To avoid discarding tunneled packets whose length is larger than the path MTU, do not set the DF bit.

This command is not supported on a GRE/IPv6 tunnel interface.

Examples

# Set the DF bit for tunneled packets on Tunnel 1.

<Sysname> system-view

[Sysname] interface tunnel 1 mode gre

[Sysname-Tunnel1] tunnel dfbit enable

tunnel out-interface

Use tunnel out-interface to specify an output interface for tunneled packets.

Use undo tunnel out-interface to restore the default.

Syntax

tunnel out-interface interface-type interface-number

undo tunnel out-interface

Default

No output interface is specified for tunneled packets of a tunnel interface. If ECMP routes exist, the device randomly selects an output interface to forward the tunneled packets.

Views

Tunnel interface view

Predefined user roles

network-admin

Parameters

interface-type interface-number: Specifies an interface by its type and number.

Usage guidelines

Use this command to control the forwarding path of tunneled packets. To ensure successful packet forwarding, the specified output interface must meet the following requirements:

·     The interface is up.

·     The interface has an IP address.

·     The interface has a route to reach the destination.

If you execute this command multiple times, the most recent configuration takes effect.

This command is applicable only to IPv4 ADVPN, IPv6 ADVPN, GRE/IPv4, GRE/IPv6, and VXLAN tunnel interfaces.

This command takes effect only on tunneled packets that are processed by CPUs. Whether the CPUs process tunneled packets depends on the device model.

Examples

# Specify VLAN-interface 1 as the output interface of GRE packets on tunnel interface Tunnel 0.

<Sysname> system-view

[Sysname] interface tunnel 0 mode gre

[Sysname-Tunnel0] tunnel out-interface vlan-interface 1

tunnel tos

Use tunnel tos to set the ToS of tunneled packets.

Use undo tunnel tos to restore the default.

Syntax

tunnel tos tos-value

undo tunnel tos

Default

The ToS of tunneled packets is the same as that of the original packets.

Views

Tunnel interface view

Predefined user roles

network-admin

Parameters

tos-value: Specifies the ToS of tunneled packets, in the range of 0 to 255.

Usage guidelines

After you execute this command, all the tunneled packets of different services sent on the tunnel interface will use the same configured ToS. For more information about ToS, see QoS Configuration Guide.

Examples

# Set the ToS of tunneled packets to 20 on Tunnel 1.

<Sysname> system-view

[Sysname] interface tunnel 1

[Sysname-Tunnel1] tunnel tos 20

Related commands

display interface tunnel

tunnel ttl

Use tunnel ttl to set the Time to Live (TTL) of tunneled packets.

Use undo tunnel ttl to restore the default.

Syntax

tunnel ttl ttl-value

undo tunnel ttl

Default

The TTL of tunneled packets is 255.

Views

Tunnel interface view

Predefined user roles

network-admin

Parameters

ttl-value: Specifies the TTL of tunneled packets, in the range of 1 to 255.

Usage guidelines

The TTL determines the maximum number of hops that the tunneled packets can pass. When the TTL expires, the tunneled packets are discarded to avoid loops.

Examples

# Set the TTL of tunneled packets to 100 on Tunnel 1.

<Sysname> system-view

[Sysname] interface tunnel 1 mode gre

[Sysname-Tunnel1] tunnel ttl 100

Related commands

display interface tunnel