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

mdc-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 in OSPF, OSPFv3, and IS-IS. For more information, see Layer 3—IP Routing Configuration Guide.

Examples

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

<Sysname> system-view

[Sysname] interface tunnel 1

[Sysname-Tunnel1] bandwidth 100

Tunneling commands -- default

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

Syntax

default

Views

Tunnel interface view

Predefined user roles

network-admin

mdc-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

Tunneling commands -- 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 Tunnel number Interface, for example, Tunnel1 Interface.

Views

Tunnel interface view

Predefined user roles

network-admin

mdc-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

Tunneling commands -- 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 | dhcp-alloc interface-type interface-number }

undo destination

Default

No tunnel destination address is configured.

Views

Tunnel interface view

Predefined user roles

network-admin

mdc-admin

Parameters

ipv4-address: Specifies the tunnel destination IPv4 address.

ipv6-address: Specifies the tunnel destination IPv6 address.

dhcp-alloc interface-type interface-number: Specifies an interface by its type and number to obtain AFTR's IPv6 address from DHCPv6 packets.

Usage guidelines

For a manual tunnel interface, you must configure the destination address. For an automatic tunnel interface, you do not need to configure the destination address.

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.

For a B4 router to automatically establish a DS-Lite tunnel with an AFTR, configure DHCPv6 client, IPv6 DNS client, and the destination dhcp-alloc command on the B4 router. In addition, make sure a DHCPv6 server and an IPv6 DNS server (for dynamic DNS) exist in the network.

After receiving a DHCPv6 packet from the interface specified by the destination dhcp-alloc command, the B4 router performs the following operations:

1. Obtains the domain name of the AFTR from the packet.

2. Sends a name query to the IPv6 DNS server to obtain the AFTR's IPv6 address.

The server resolves the domain name to the IPv6 address of AFTR.

For more information about DHCPv6 server, DHCPv6 client, and IPv6 DNS, see Layer 3—IP Services Configuration Guide.

Examples

# The interface GigabitEthernet 1/0/1 on Sysname 1 uses the IP address 193.101.1.1 and the interface GigabitEthernet 1/0/1 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. (Applicable to routers.)

<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. (Applicable to routers.)

<Sysname2> system-view

[Sysname2] interface tunnel 1 mode gre

[Sysname2-Tunnel1] source 192.100.1.1

[Sysname2-Tunnel1] destination 193.101.1.1

# 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. (Applicable to switches.)

<Sysname1> system-view

[Sysname1] interface tunnel 1 mode ipv6-ipv4

[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. (Applicable to switches.)

<Sysname2> system-view

[Sysname2] interface tunnel 1 mode ipv6-ipv4

[Sysname2-Tunnel1] source 192.100.1.1

[Sysname2-Tunnel1] destination 193.101.1.1

Related commands

display interface tunnel

interface tunnel

ipv6 address dhcp-alloc

source

Tunneling commands -- display 6rd

Use display 6rd to display 6RD tunnel interface information.

Syntax

display 6rd [ interface tunnel number ]

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

interface tunnel number: Specifies an existing tunnel interface by its number. If you do not specify a 6RD tunnel interface, this command displays information about all existing 6RD tunnel interfaces.

Examples

# Display information about 6RD tunnel interface Tunnel 1.

<Sysname> display 6rd interface tunnel 1

Interface : Tunnel1

Tunnel source : 10.11.12.13

6RD status : Operational

IPv6 prefix : 2001:1000::/32

IPv4 prefix : 10.0.0.0/8

IPv4 suffix : 0.0.0.0/0

BR address : 10.11.12.1

Delegated prefix: 2001:1000:B0C:D00::/56

# Display information about all 6RD tunnel interfaces.

<Sysname> display 6rd

Interface : Tunnel0

Tunnel source : 0.0.0.0

6RD status : Not operational

IPv6 prefix : 2002:1000::/32

Interface : Tunnel1

Tunnel source : 10.11.12.13

6RD status : Operational

IPv6 prefix : 2001:1000::/32

IPv4 prefix : 10.0.0.0/8

IPv4 suffix : 0.0.0.0/0

BR address : 10.11.12.1

Delegated prefix: 2001:1000:B0C:D00::/56

Table 1 Command output

Field | Description
Interface | Tunnel interface.
Tunnel source | Source address of the tunnel. If a source interface is specified for the tunnel interface, this field displays the IP address of the source interface. If no source address or source interface is specified for the tunnel interface, or the specified source interface has no IP address, this field displays 0.0.0.0.
6RD status | 6RD configuration status: · Operational—6RD configuration is available. · Not operational—6RD configuration is not available. This field displays Operational when the tunnel source address and 6RD prefix are configured.
IPv6 prefix | 6RD prefix and its length. If no 6RD prefix is configured, this field displays Not configured.
IPv4 prefix | IPv4 prefix and its length. If the prefix length is not configured, this field displays 0.0.0.0/0.
IPv4 suffix | IPv4 suffix and its length. If the suffix length is not configured, this field displays 0.0.0.0/0.
BR address | IP address of the BR router. If no BR address is configured, this field displays Not configured.
Delegated prefix | 6RD delegated prefix calculated based on the 6RD configuration. This field is empty if the 6RD status is Not operational.

Related commands

tunnel 6rd br

tunnel 6rd ipv4

tunnel 6rd prefix

Tunneling commands -- display 6rd destination

Use display 6rd destination to display a 6RD tunnel destination address.

Syntax

display 6rd destination prefix ipv6-prefix interface tunnel number

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

prefix ipv6-prefix: Specifies a 6RD delegated prefix.

interface tunnel number: Specifies an existing tunnel interface by its number.

Usage guidelines

After this command is executed, the system displays the 6RD tunnel destination address calculated by the specified 6RD delegated prefix and 6RD configuration on the tunnel interface. The 6RD configuration includes the 6RD prefix/prefix length, IPv4 prefix/prefix length, and IPv4 suffix/suffix length.

Examples

# Display the 6RD tunnel destination address calculated by the 6RD delegated prefix 2001:1000:0101:0100:: and 6RD configuration on Tunnel 1.

<Sysname> display 6rd destination prefix 2001:1000:0101:0100:: interface tunnel 1

Interface : Tunnel1

Delegated prefix: 2001:1000:101:100::

Destination : 10.1.1.1

Table 2 Command output

Field | Description
Interface | Tunnel interface.
Delegated prefix | 6RD delegated prefix.
Destination | Tunnel destination address.

Related commands

display 6rd prefix

Tunneling commands -- display 6rd prefix

Use display 6rd prefix to display a 6RD delegated prefix.

Syntax

display 6rd prefix destination ipv4-address interface tunnel number

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Parameters

destination ipv4-address: Specifies a 6RD tunnel destination address.

interface tunnel number: Specifies an existing tunnel interface by its number.

Usage guidelines

After this command is executed, the system displays the 6RD delegated prefix calculated by the specified 6RD tunnel destination address and 6RD configuration on the tunnel interface. The 6RD configuration includes the 6RD prefix/prefix length, IPv4 prefix/prefix length, and IPv4 suffix/suffix length. The 6RD delegated prefix calculated on the peer tunnel interface must be the same as the 6RD delegated prefix configured on the local device.

Examples

# Display the 6RD delegated prefix calculated by the 6RD tunnel destination address 10.1.1.1 and 6RD configuration on Tunnel 1.

<Sysname> display 6rd prefix destination 10.1.1.1 interface tunnel 1

Interface : Tunnel1

Destination : 10.1.1.1

Delegated Prefix: 2001:1000:101:100::

Table 3 Command output

Field | Description
Interface | Tunnel interface.
Destination | 6RD tunnel destination address.
Delegated Prefix | 6RD delegated prefix.

Related commands

display 6rd destination

Tunneling commands -- display ds-lite b4 information

Use display ds-lite b4 information to display information about the connected B4 routers on the AFTR, including the IPv6 addresses of the B4 routers, and the assigned tunnel IDs.

Syntax

display ds-lite b4 information

Views

Any view

Predefined user roles

network-admin

network-operator

mdc-admin

mdc-operator

Examples

# (Centralized devices.) Display information about the connected B4 routers.

<Sysname> display ds-lite b4 information

B4 address Tunnel ID Tunnel interface Idle time

1234:5678:1234:5678:abcd:abcd:efff:1234 0x00000023 1 12

2000::100:1 0x80000013 2 13

3000::2 0x00000015 3 8

3001::2 0x00000032 -- 15

Total B4 addresses: 4

# (Distributed devices in standalone mode.) (Centralized IRF devices.) Display information about the connected B4 routers.

<Sysname> display ds-lite b4 information

Slot 0 Cpu 0:

B4 address Tunnel ID Tunnel interface Idle time

1234:5678:1234:5678:abcd:abcd:efff:1234 0x00000023 1 12

2000::100:1 0x80000013 2 13

3000::2 0x00000015 3 2

3001::2 0x00000032 -- --

Total B4 addresses: 4

Slot 1 Cpu 0:

B4 address Tunnel ID Tunnel interface Idle time

1234:5678:1234:5678:abcd:abcd:efff:ffff 0x00000125 1 12

5000::100:1 0x80000010 5 13

Total B4 addresses: 2

Table 4 Command output

Field | Description
B4 address | IPv6 address of the B4 router.
Tunnel ID | Tunnel ID that the IPv6 address of the B4 router maps to.
Tunnel interface | ID of the tunnel interface on the DS-Lite tunnel to which the mapping belongs. When the tunnel to which the mapping belongs is removed or a tunnel with the same ID but different mode is created, this field displays hyphens (--).
Idle time | Remaining time in minutes for the mapping between the IPv6 address of the B4 router and tunnel ID. When the mapping ages out but is still used by a session, this field displays hyphens (--).
Total B4 addresses | Number of IPv6 addresses of the B4 routers.

Tunneling commands -- 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

mdc-admin

mdc-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

Output queue - Urgent queuing: Size/Length/Discards 0/100/0

Output queue - Protocol queuing: Size/Length/Discards 0/500/0

Output queue - FIFO queuing: Size/Length/Discards 0/75/0

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 5 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). · DOWN (Tunnel-Bundle administratively down)—The tunnel bundle interface to which the interface belongs has been shut down by using the shutdown command. · 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 TOS | ToS of tunneled packets.
Tunnel TTL | TTL of tunneled packets.
Tunnel protocol/transport | Tunnel mode and transport protocol: · CR_LSP—MPLS TE tunnel mode. · GRE/IP—GRE/IPv4 tunnel mode. · GRE/IPv6—GRE/IPv6 tunnel mode. · GRE_ADVPN/IP—GRE-encapsulated IPv4 ADVPN tunnel mode. · GRE_ADVPN/IPv6—GRE-encapsulated IPv6 ADVPN tunnel mode. · UDP_ADVPN/IP—UDP-encapsulated IPv4 ADVPN tunnel mode. · UDP_ADVPN/IPv6—UDP-encapsulated IPv6 ADVPN tunnel mode. · GRE_EVI/IP—GRE-encapsulated IPv4 EVI tunnel mode. · GRE_EVI/IPv6—GRE-encapsulated IPv6 EVI tunnel mode. · IP/IP—IPv4 over IPv4 tunnel mode. · IP/IPv6—IPv4 over IPv6 tunnel mode. · IPv6—IPv6 tunnel mode. · IPv6/IP—IPv6 over IPv4 manual tunnel mode. · IPv6/IP 6to4—IPv6 over IPv4 6to4 tunnel mode. · IPv6/IP auto-tunnel—Automatic IPv6 over IPv4 tunnel mode. · IPv6/IP ISATAP—IPv6 over IPv4 ISATAP tunnel mode. · IPv6/IPv6—IPv6 over IPv6 tunnel mode. · DSLITE—DS-Lite tunnel mode on the AFTR. · UDP_VXLAN/IP—UDP-encapsulated IPv4 VXLAN tunnel mode. · NVE/IP—IPv4 NVE tunnel mode.
GRE key disabled | No GRE tunnel interface key is configured.
Checksumming of GRE packets disabled | The GRE packet checksum feature is disabled.
Source port number is 18001 | The source port number is 18001 in ADVPN packets sent by the UDP-encapsulated ADVPN tunnel interface.
Output queue - Urgent queuing: Size/Length/Discards 0/100/0 | Urgent output queue statistics: Number of packets in the queue/maximum number of packets that the queue can contain/number of packets discarded in the queue.
Output queue - Protocol queuing: Size/Length/Discards 0/500/0 | Protocol output queue statistics: Number of packets in the queue/maximum number of packets that the queue can contain/number of packets discarded in the queue.
Output queue - FIFO queuing: Size/Length/Discards 0/75/0 | FIFO output queue statistics: Number of packets in the queue/maximum number of packets that the queue can contain/number of packets discarded in the queue. When a CBQ or WFQ queue is configured, this field displays statistics for the CBQ or WFQ queue.
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. Input packets are counted after hardware or software de-encapsulation. Support for counting packets after hardware de-encapsulation depends on the device model.
Output: 0 packets, 0 bytes, 0 drops | Total output packets, total output bytes, and total output packets dropped. Output packets are counted before hardware or software encapsulation. Support for counting packets before hardware encapsulation depends on the device model.

# 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 aaaaaaaaaaaaaaaaaaaaaaaaaaa

# 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 aaaaaaaaaaaaaaaaaaaaaaaaaaaaa

Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

# 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 6 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. · DOWN (Tunnel-Bundle administratively down)—The tunnel bundle interface to which the tunnel interface belongs has been shut down by using the shutdown command.

Related commands

destination

interface tunnel

source

Tunneling commands -- ds-lite enable

Use ds-lite enable to enable DS-Lite tunneling on an interface.

Use undo ds-lite enable to disable DS-Lite tunneling on an interface.

Syntax

ds-lite enable

undo ds-lite enable

Default

DS-Lite tunneling is disabled on an interface.

Views

Interface view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

Use this command on the AFTR's interface connected to the public IPv4 network, so the AFTR can forward IPv4 packets to the B4 router through the DS-Lite tunnel.

You cannot enable DS-Lite tunneling on a DS-Lite tunnel interface on the AFTR.

Examples

# Enable DS-Lite tunneling on GigabitEthernet 1/0/1. (Applicable to routers.)

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] ds-lite enable

# Enable DS-Lite tunneling on VLAN-interface 10. (Applicable to switches.)

<Sysname1> system-view

[Sysname1] interface vlan-interface 10

[Sysname1-Vlan-interface10] ds-lite enable

Tunneling commands -- encapsulation-limit

Use encapsulation-limit to set the maximum number of nested encapsulations of a packet allowed on a tunnel interface.

Use undo encapsulation-limit to restore the default.

Syntax

encapsulation-limit number

undo encapsulation-limit

Default

There is no limit to the nested encapsulations of a packet.

Views

Tunnel interface view

Predefined user roles

network-admin

mdc-admin

Parameters

number: Specifies the number of nested encapsulations, in the range of 0 to 10.

Usage guidelines

A packet added with excessive headers becomes oversized. If it exceeds the MTU, it must be fragmented. The fragmentation decreases forwarding rate and increases processing complexity. To avoid this situation, use this command to limit the number of encapsulations.

This command is applicable only to IPv6 over IPv6 tunnels.

Examples

# Set the maximum number of nested encapsulations to 3 on Tunnel 1.

<Sysname> system-view

[Sysname] interface tunnel 1 mode ipv6

[Sysname-Tunnel1] encapsulation-limit 3

Related commands

display interface tunnel

Tunneling commands -- 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 { advpn { gre | udp } [ ipv6 ] | ds-lite-aftr | evi [ ipv6 ] | gre [ ipv6 ] | ipv4-ipv4 | ipv4-ipv6 | ipv6 | ipv6-ipv4 [ 6rd | 6to4 | auto-tunnel | isatap ] | ipv6-ipv6 | mpls-te | nve | nvgre | vxlan | vxlan-dci } ]

undo interface tunnel number

Default

No tunnel interfaces exist.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

number: Specifies the number of the tunnel interface. The value range is 0 to 2047. The number of tunnel interfaces that can be created is restricted by the total number of interfaces and the memory.

mode advpn gre: Specifies the GRE-encapsulated IPv4 ADVPN tunnel mode.

mode advpn udp: Specifies the UDP-encapsulated IPv4 ADVPN tunnel mode.

mode advpn gre ipv6: Specifies the GRE-encapsulated IPv6 ADVPN tunnel mode.

mode advpn udp ipv6: Specifies the UDP-encapsulated IPv6 ADVPN tunnel mode.

mode ds-lite-aftr: Specifies the DS-Lite tunnel mode on the AFTR.

mode evi: Specifies the IPv4 EVI tunnel mode.

mode evi ipv6: Specifies the IPv6 EVI tunnel mode.

mode gre: Specifies the GRE/IPv4 tunnel mode.

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

mode ipv4-ipv4: Specifies the IPv4 over IPv4 tunnel mode.

mode ipv4-ipv6: Specifies the IPv4 over IPv6 tunnel mode.

mode ipv6: Specifies the IPv6 tunnel mode. Set this mode for IPv4 over IPv6 manual and IPv6 over IPv6 tunnels.

mode ipv6-ipv4: Specifies the IPv6 over IPv4 manual tunnel mode.

mode ipv6-ipv4 6rd: Specifies the 6RD tunnel mode.

mode ipv6-ipv4 6to4: Specifies the 6to4 tunnel mode.

mode ipv6-ipv4 auto-tunnel: Specifies the IPv4-compatible IPv6 automatic tunnel mode.

mode ipv6-ipv4 isatap: Specifies the ISATAP tunnel mode.

mode ipv6-ipv6: Specifies the IPv6 over IPv6 tunnel mode.

mode mpls-te: Specifies the MPLS TE tunnel mode.

mode nve: Specifies the NVE tunnel mode.

mode nvgre: Specifies the NVGRE tunnel mode.

mode vxlan: Specifies the VXLAN tunnel mode.

mode vxlan-dci: Specifies the VXLAN-DCI 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

Tunneling commands -- 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

mdc-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 10000 bytes.

<Sysname> system-view

[Sysname] interface tunnel 1

[Sysname-Tunnel1] mtu 10000

Related commands

display interface tunnel

Tunneling commands -- 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

mdc-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

Tunneling commands -- service

Use service to specify a traffic processing slot for a tunnel interface.

Use undo service to restore the default.

Syntax

Distributed devices in standalone mode:Centralized IRF devices:

service slot slot-number

undo service slot

Distributed devices in IRF mode:

service chassis chassis-number slot slot-number

undo service chassis

Default

No traffic processing slot is specified for a tunnel interface.

Views

Tunnel interface view

Predefined user roles

network-admin

mdc-admin

Parameters

slot slot-number: Specifies a card by its slot number. (Distributed devices in standalone mode.)

slot slot-number: Specifies an IRF member device by its member ID. (Centralized IRF devices.) (IRF 3 incapable.)

slot slot-number: Specifies an IRF member device by its member ID or specifies a PEX by its virtual slot number. (Centralized IRF devices.) (IRF 3 capable.)

chassis chassis-number slot slot-number: Specifies a card on an IRF member device. The chassis-number argument represents the member ID of the IRF member device. The slot-number argument represents the slot number of the card. (Distributed devices in IRF mode.) (IRF 3 incapable.)

chassis chassis-number slot slot-number: Specifies a card on an IRF member device or specifies a PEX. The chassis-number argument represents the member ID of the IRF member device or the virtual chassis number of the PEX. The slot-number argument represents the slot number of the card or PEX. (Distributed devices in IRF mode.) (IRF 3 capable.)

Usage guidelines

This command is supported only on distributed devices and IRF-capable centralized devices.

Specify a traffic processing slot if a feature (for example, IPsec antireplay) requires that all traffic on a tunnel interface be processed on the same slot.

Make sure the specified traffic processing slot is available. If the specified traffic processing slot is unavailable, traffic on the tunnel interface cannot be forwarded, whether or not the tunnel interface is up. Traffic on the tunnel interface will not be forwarded until the traffic processing slot becomes available or until you respecify an available traffic processing slot.

Examples

# Specify a traffic processing slot for Tunnel 200.

<Sysname> system-view

[Sysname] interface tunnel 200

[Sysname-Tunnel200] service slot 1

Tunneling commands -- 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 down.

Views

Tunnel interface view

Predefined user roles

network-admin

mdc-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

Tunneling commands -- 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

mdc-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.

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.

You cannot specify the tunnel interface of the DS-Lite tunnel on the AFTR as the source interface.

Examples

# Specify GigabitEthernet 1/0/1 as the source interface of Tunnel 1. (Applicable to routers.)

<Sysname> system-view

[Sysname] interface tunnel 1 mode gre

[Sysname-Tunnel1] source gigabitethernet 1/0/1

# Specify 192.100.1.1 as the source address of Tunnel 1. (Applicable to routers.)

<Sysname> system-view

[Sysname] interface tunnel 1 mode gre

[Sysname-Tunnel1] source 192.100.1.1

# Specify VLAN-interface 10 as the source interface of Tunnel 1. (Applicable to switches.)

<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. (Applicable to switches.)

<Sysname> system-view

[Sysname] interface tunnel 1 mode gre

[Sysname-Tunnel1] source 192.100.1.1

Related commands

destination

display interface tunnel

interface tunnel

Tunneling commands -- tunnel 6rd br

Use tunnel 6rd br to specify a BR address for a 6RD tunnel.

Use undo tunnel 6rd br to restore the default.

Syntax

tunnel 6rd br ipv4-address

undo tunnel 6rd br

Default

No BR address is specified for a 6RD tunnel.

Views

Tunnel interface view

Predefined user roles

network-admin

mdc-admin

Parameters

ipv4-address: Specifies the BR address (IPv4 address of a 6RD BR router), in dotted decimal notation.

Usage guidelines

Use this command on a 6RD CE. For a 6RD network to communicate with a non-6RD network over a 6RD tunnel, you must specify the BR address on the 6RD CE.

All the 6RD CEs and 6RD BR routers in a 6RD network must have the same IPv4 prefix and suffix. Make sure the BR address and the tunnel source address have the same IPv4 prefix and suffix.

Examples

# Specify the BR address as 10.11.12.13 on Tunnel 1.

<Sysname> system-view

[Sysname] interface tunnel 1 mode ipv6-ipv4 6rd

[Sysname-Tunnel1] tunnel 6rd br 10.11.12.13

Related commands

display 6rd

Tunneling commands -- tunnel 6rd ipv4

Use tunnel 6rd ipv4 to specify a prefix length and a suffix length for a 6RD tunnel source address.

Use undo tunnel 6rd ipv4 to restore the default.

Syntax

tunnel 6rd ipv4 { prefix-length length | suffix-length length } *

undo tunnel 6rd ipv4

Default

All 32 bits of the IPv4 tunnel source address are used to create the 6RD delegated prefix.

Views

Tunnel interface view

Predefined user roles

network-admin

mdc-admin

Parameters

prefix-length length: Specifies the prefix length in the range of 0 to 31.

suffix-length length: Specifies the suffix length in the range of 0 to 31.

Usage guidelines

All 6RD tunnel interfaces in a 6RD network must be configured with the same IPv4 prefix length and suffix length.

You can specify a prefix length, a suffix length, both prefix and suffix lengths, or neither. The device will remove the prefix and suffix bits from the tunnel source address and embed the left bits of the address to the 6RD delegated prefix. If neither a prefix length nor a suffix length is specified, all 32 bits of the IPv4 tunnel source address will be embedded in the 6RD delegated prefix.

Examples

# Specify both the prefix length and suffix length as 8 on Tunnel 1.

<Sysname> system-view

[Sysname] interface tunnel 1 mode ipv6-ipv4 6rd

[Sysname-Tunnel1] tunnel 6rd ipv4 prefix-length 8 suffix-length 8

Related commands

display 6rd

display 6rd destination

display 6rd prefix

Tunneling commands -- tunnel 6rd prefix

Use tunnel 6rd prefix to configure the 6RD prefix for a 6RD tunnel.

Use undo tunnel 6rd prefix to restore the default.

Syntax

tunnel 6rd prefix ipv6-prefix/prefix-length

undo tunnel 6rd prefix

Default

No 6RD prefix is configured for a 6RD tunnel.

Views

Tunnel interface view

Predefined user roles

network-admin

mdc-admin

Parameters

ipv6-prefix/prefix-length: Specifies the IPv6 prefix and its length. The value range for the prefix length is 1 to 127.

Usage guidelines

A 6RD delegated prefix contains a 6RD prefix and all or part of the bits in the IPv4 tunnel source address.

All tunnels in a 6RD network must have the same 6RD prefix.

Examples

# Configure the 6RD prefix as 2001:1000::/32 on Tunnel 1.

<Sysname> system-view

[Sysname] interface tunnel 1 mode ipv6-ipv4 6rd

[Sysname-Tunnel1] tunnel 6rd prefix 2001:1000::/32

Related commands

display 6rd

display 6rd destination

display 6rd prefix

Tunneling commands -- 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

mdc-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 and an 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

Tunneling commands -- tunnel discard ipv4-compatible-packet

Use tunnel discard ipv4-compatible-packet to enable dropping IPv6 packets that use IPv4-compatible IPv6 addresses.

Use undo tunnel discard ipv4-compatible-packet to restore the default.

Syntax

tunnel discard ipv4-compatible-packet

undo tunnel discard ipv4-compatible-packet

Default

IPv6 packets that use IPv4-compatible IPv6 addresses are not dropped.

Views

System view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

This command enables the device to check the source and destination IPv6 addresses of the de-encapsulated IPv6 packets from a tunnel. If a packet uses an IPv4-compatible IPv6 address as the source or destination address, the device discards the packet.

Examples

# Enable dropping IPv6 packets that use IPv4-compatible IPv6 addresses.

<Sysname> system-view

[Sysname] tunnel discard ipv4-compatible-packet

Tunneling commands -- tunnel ipv6-fragmentation-check enable

Use tunnel ipv6-fragmentation-check enable to enable fragmentation check for packets to be tunneled.

Use undo tunnel ipv6-fragmentation-check enable to disable fragmentation check for packets to be tunneled.

Syntax

tunnel ipv6-fragmentation-check enable

undo tunnel ipv6-fragmentation-check enable

Default

Fragmentation check is disabled for packets to be tunneled.

Views

System view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

This command enables the tunnel source to perform fragmentation check for IPv6 packets to be tunneled through an IPv6 over IPv4 tunnel. The tunnel source returns an ICMPv6 Packet Too Big message to the packet sending source and discards the packet if the packet size exceeds both of the following values:

· Outgoing interface MTU minus the IPv4 header length.

· The minimum IPv6 path MTU 1280 bytes.

Examples

# Enable IPv6 fragmentation check for packets to be tunneled.

<Sysname> system-view

[Sysname] tunnel ipv6-fragmentation-check enable

Tunneling commands -- tunnel log updown with-tag

Use tunnel log updown with-tag to add the TUNNEL string to the PHY_UPDOWN log mnemonic for tunnel interfaces.

Use undo tunnel log updown with-tag to remove the TUNNEL string from the PHY_UPDOWN log mnemonic for tunnel interfaces.

Syntax

tunnel log updown with-tag

undo tunnel log updown with-tag

Default

The PHY_UPDOWN log mnemonic for tunnel interfaces does not contain the TUNNEL string.

Views

System view

Predefined user roles

network-admin

mdc-admin

Usage guidelines

This command adds the TUNNEL string to the PHY_UPDOWN log mnemonic for tunnel interfaces. Use this command if you want to identify the interface state change logs for tunnel interfaces by using a regular expression that contains the TUNNEL string.

A tunnel interface state change log without the TUNNEL string in the mnemonic:

%Jan 8 18:45:33:621 2011 H3C IFNET/3/PHY_UPDOWN: Physical state on the interface Tunnel1 changed to down.

A tunnel interface state change log with the TUNNEL string in the mnemonic:

%Jan 8 18:45:33:621 2011 H3C IFNET/3/TUNNEL_PHY_UPDOWN: Physical state on the interface Tunnel1 changed to down.

Examples

# Add the TUNNEL string to the PHY_UPDOWN log mnemonic for tunnel interfaces.

<Sysname> system-view

[Sysname] tunnel log updown with-tag

Tunneling commands -- 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 the ToS of the original packets.

Views

Tunnel interface view

Predefined user roles

network-admin

mdc-admin

Parameters

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

Usage guidelines

After you configure 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 ACL and QoS Configuration Guide.

Examples

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

<Sysname> system-view

[Sysname] interface tunnel 1 mode gre

[Sysname-Tunnel1] tunnel tos 20

Related commands

display interface tunnel

Tunneling commands -- 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

mdc-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

Tunneling commands -- tunnel vpn-instance

Use tunnel vpn-instance to specify a VPN instance for the destination address of a tunnel interface.

Use undo tunnel vpn-instance to restore the default.

Syntax

tunnel vpn-instance vpn-instance-name

undo tunnel vpn-instance

Default

The destination address of a tunnel interface belongs to the public network.

Views

Tunnel interface view

Predefined user roles

network-admin

mdc-admin

Parameters

vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters.

Usage guidelines

After this command is executed, the device looks up the routing table of the specified VPN instance to forward tunneled packets on the tunnel interface.

For a tunnel interface to come up, the tunnel source and destination must belong to the same VPN instance. To specify a VPN instance for the tunnel source, use the ip binding vpn-instance command on the tunnel source interface.

Examples

# Specify VPN instance vpn10 for the tunnel destination on Tunnel 1. (Applicable to routers.)

<Sysname> system-view

[Sysname] ip vpn-instance vpn10

[Sysname-vpn-instance-vpn10] route-distinguisher 1:1

[Sysname-vpn-instance-vpn10] vpn-target 1:1

[Sysname-vpn-instance-vpn10] quit

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] ip binding vpn-instance vpn10

[Sysname-GigabitEthernet1/0/1] ip address 1.1.1.1 24

[Sysname-GigabitEthernet1/0/1] quit

[Sysname] interface tunnel 1 mode gre

[Sysname-Tunnel1] source gigabitethernet 1/0/1

[Sysname-Tunnel1] destination 1.1.1.2

[Sysname-Tunnel1] tunnel vpn-instance vpn10

# Specify VPN instance vpn10 for the tunnel destination on Tunnel 1. (Applicable to switches.)

<Sysname> system-view

[Sysname] ip vpn-instance vpn10

[Sysname-vpn-instance-vpn10] route-distinguisher 1:1

[Sysname-vpn-instance-vpn10] vpn-target 1:1

[Sysname-vpn-instance-vpn10] quit

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] ip binding vpn-instance vpn10

[Sysname-Vlan-interface10] ip address 1.1.1.1 24

[Sysname-Vlan-interface10] quit

[Sysname] interface tunnel 1 mode gre

[Sysname-Tunnel1] source vlan-interface 10

[Sysname-Tunnel1] destination 1.1.1.2

[Sysname-Tunnel1] tunnel vpn-instance vpn10

Related commands

ip binding vpn-instance (MPLS Command Reference)