source(IPv4 over IPv6 Tunnel)

Function

The source command configures a source IPv6 address or source interface for an IPv4 over IPv6 tunnel interface.

The undo source command deletes a source IPv6 address or source interface for an IPv4 over IPv6 tunnel interface.

By default, no source IPv6 address or source interface is configured for an IPv4 over IPv6 tunnel interface.

Format

source ipv6-address

source { interface-name | interface-type interface-number }

undo source

Parameters

Parameter	Description	Value
ipv6-address	Specifies the source IPv6 address for an IPv4 over IPv6 tunnel interface.	The address is a 32-digit hexadecimal number, in the format of X:X:X:X:X:X:X:X.
interface-name	Specifies the source interface name for an IPv4 over IPv6 tunnel.	The value is a string of 1 to 63 case-sensitive characters, spaces not supported.
interface-type	Specifies the source interface type for an IPv4 over IPv6 tunnel.	The value is an enumerated type, case-insensitive and can only be loopback.
interface-number	Specifies the source interface number for an IPv4 over IPv6 tunnel. The interface-type and interface-number parameters can be separated by spaces or configured without a space in between.	The value is a string of 1 to 63 case-sensitive characters, spaces not supported.

Views

Tunnel interface view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
tunnel6	write

Usage Guidelines

Usage Scenario

When configuring an IPv4 over IPv6 tunnel, you need to create a tunnel interface and run the source command to configure a source IPv6 address or source interface for the tunnel interface.

Prerequisites

The tunnel encapsulation mode has been set to IPv4 over IPv6 using the tunnel-protocol ipv4-ipv6 command.

Precautions

The same source and destination addresses cannot be configured for two or more tunnel interfaces that use the same encapsulation protocol.

The source IPv6 address specified for the tunnel interface at one end of an IPv4 over IPv6 tunnel must be the same as the destination IPv6 address specified for the tunnel interface on the other end of the tunnel. In addition, you must ensure that the route to the interface that receives packets on the other end of the tunnel is reachable.

Example

# Configure an IPv4 over IPv6 tunnel interface named Tunnel 1 and specify the source IPv6 address as 2001:db8:200::1.

<HUAWEI> system-view
[~HUAWEI] interface Tunnel 1
[*HUAWEI-Tunnel1] tunnel-protocol ipv4-ipv6
[*HUAWEI-Tunnel1] source 2001:db8:200::1
Info: The source address must be the address of the loopback interface.

# Configure an IPv4 over IPv6 tunnel interface named Tunnel 1 and specify LoopBack 1 as the source interface.

<HUAWEI> system-view
[~HUAWEI] interface LoopBack 1
[*HUAWEI-LoopBack1] quit
[*HUAWEI] interface Tunnel 1
[*HUAWEI-Tunnel1] tunnel-protocol ipv4-ipv6
[*HUAWEI-Tunnel1] source LoopBack 1