peer ipv6-prefix export (BGP-VPN instance IPv6 address family view)

Function

The peer ipv6-prefix export command configures a policy based on an IPv6 prefix list for filtering BGP routes to be advertised to a specified peer.

The undo peer ipv6-prefix export command cancels this configuration.

By default, no route filtering policy based on an IP address prefix list is configured for a peer.

Format

peer ipv4-address ipv6-prefix ipv6-prefix-name export

undo peer ipv4-address ipv6-prefix [ ipv6-prefix-name ] export

Parameters

Parameter	Description	Value
ipv4-address	Specifies the IPv4 address of a peer.	It is in dotted decimal notation.
ipv6-prefix ipv6-prefix-name	Indicates the filtering policy that is based on the IPv6 prefix list of the peer.	The name is a string of 1 to 169 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.
export	Applies a filtering policy to the routes to be advertised to a peer.	-

Parameter

Description

Value

ipv4-address

Specifies the IPv4 address of a peer.

It is in dotted decimal notation.

ipv6-prefix ipv6-prefix-name

Indicates the filtering policy that is based on the IPv6 prefix list of the peer.

The name is a string of 1 to 169 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.

export

Applies a filtering policy to the routes to be advertised to a peer.

Views

BGP-VPN instance IPv6 address family view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
bgp	write

Usage Guidelines

Usage Scenario

The peer ipv6-prefix export command can be used to configure a route filtering policy that is based on an IPv6 prefix list for filtering BGP routes to be advertised to a specified peer, implementing route control.

Prerequisites

If the peer ipv6-prefix command specifies an IPv6 prefix list that does not exist for a peer, use the ip ipv6-prefix command to create an IPv6 prefix list.

Configuration Impact

If an IPv6 prefix list is specified for a peer group, all the members of the peer group inherit the configuration.

After an IPv6 prefix list is specified for a peer, the peer filter the routes to be advertised to other peers based on the IPv6 prefix list. Only the routes that pass the filtering of the IPv6 prefix list can be advertised.

Precautions

The peer ipv6-prefix export command is mutually exclusive with the peer route-filter export commands.

Example

# Configure a route filtering policy based on an IPv6 prefix list.

<HUAWEI> system-view
[~HUAWEI] ip ipv6-prefix list1 permit 2001:DB8:1::1 8 greater-equal 17 less-equal 18
[*HUAWEI] ip vpn-instance vpna
[*HUAWEI-vpn-instance-vpna] ipv6-family
[*HUAWEI-vpn-instance-vpn1-af-ipv6] route-distinguisher 100:1
[*HUAWEI-vpn-instance-vpna-af-ipv6] quit
[*HUAWEI-vpn-instance-vpna] quit
[*HUAWEI] bgp 100
[*HUAWEI-bgp] vpn-instance vpna
[*HUAWEI-bgp-vpna] peer 10.1.1.1 as-number 100
[*HUAWEI-bgp-vpna] quit
[*HUAWEI-bgp] ipv6-family vpn-instance vpna
[*HUAWEI-bgp-6-vpna] peer 10.1.1.1 enable
[*HUAWEI-bgp-6-vpna] peer 10.1.1.1 ipv6-prefix list1 export