ipv6 address-policy

Function

The ipv6 address-policy command configures the policies for selecting source and destination addresses.

The undo ipv6 address-policy command deletes the policies for selecting source and destination addresses.

By default, only default address selection policy entries are configured. These entries are prefixed with ::1, ::, 2002::, FC00::, and ::ffff:0.0.0.0.

Format

ipv6 address-policy [ vpn-instance vpn-instance-name ] ipv6-address prefix-length precedence label

undo ipv6 address-policy [ vpn-instance vpn-instance-name ] ipv6-address prefix-length

Parameters

Parameter	Description	Value
vpn-instance vpn-instance-name	Specifies the name of a VPN instance.	The value is a string of 1 to 31 case-sensitive characters, spaces not supported. In addition, the VPN instance name must not be _public_. When double quotation marks are used around the string, spaces are allowed in the string.
ipv6-address	Specifies an IPv6 address.	The prefix is a 32-digit hexadecimal number, in the format of X:X:X:X:X:X:X:X.
prefix-length	Specifies the prefix length of an IPv6 address.	The value is an integer that ranges from 0 to 128.
precedence	Specifies the priority of an IPv6 address when the address is the destination address.	The value is an integer that ranges from 0 to 4294967295.
label	Specifies the priority of an IPv6 address when the address is the source address.	The value is an integer that ranges from 0 to 4294967295.

Views

System view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
interface-mgr	write

Usage Guidelines

Usage Scenario

Source/destination addresses used for sending out can be manipulated by applying policy entries into the policy table. The ipv6 address-policy command allows the user to configure source/destination address selection policy for an address/prefix. The policy table allows the user to give preference to an address/prefix in comparison to other available addresses/prefixes during the source/destination address selection.

Configuration Impact

The label parameter can be used to determine the result of source address selection. The address whose label value is the same as the label value of the destination address is selected preferably as the source address.
The destination address is selected based on both the label and precedence parameters. If label values of the candidate addresses are the same, the address whose precedence value is the largest is selected preferably as the destination address.

Precautions

The default policy entries are those whose prefixes are ::1, ::, 2002::, FC00::, and :ffff:0.0.0.0.

Default policy entries cannot be configured by using a command.

Example

# Configure the priorities to be 15 and 20 respectively when the IPv6 address 2001:db8::1/64 is used as a source address and a destination address.

<HUAWEI> system-view
[~HUAWEI] ipv6 address-policy 2001:db8::1 64 15 20