peer advertise add-path (BGP-VPNv4 address family view) (IPv6)

Function

The peer advertise add-path command configures the maximum number of routes that the device can send to a specified peer.

The undo peer advertise add-path command restores the default configurations.

By default, the device sends only the optimal route to a peer.

Format

peer ipv6-address advertise add-path path-number path-number

undo peer ipv6-address advertise add-path

Parameters

Parameter	Description	Value
ipv6-address	Specifies the IPv6 address of a peer.	The value is a 32-digit hexadecimal number, in the format of X:X:X:X:X:X:X:X.
path-number path-number	Specifies the maximum number of routes that the device can send.	The value is an integer ranging from 2 to 64.

Parameter

Description

Value

ipv6-address

Specifies the IPv6 address of a peer.

The value is a 32-digit hexadecimal number, in the format of X:X:X:X:X:X:X:X.

path-number path-number

Specifies the maximum number of routes that the device can send.

The value is an integer ranging from 2 to 64.

Views

BGP-VPNv4 address family view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
bgp	write

Usage Guidelines

Usage Scenario

After BGP Add-Path is configured on an RR, the RR needs to send routes to a specified peer. To configure the maximum number of routes that the RR can send to the peer, run the peer advertise add-path command. The actual number of routes that the RR can send to the peer is the smaller one of the value configured using the peer advertise add-path command and the actual number of routes selected by the RR. If the maximum number of routes that the RR can send to the peer is less than the actual number of routes selected by the RR, the RR selects the optimal and Add-Path routes based on the BGP route selection rules.

Prerequisites

The following operations have been performed:

BGP Add-Path has been enabled and the maximum number of routes that an RR can select has been configured using the bestroute add-path command.
The RR has been enabled to send Add-Path routes to a specified peer using the peer capability-advertise add-path send command.

Precautions

To enable the device to receive Add-Path routes from a specified BGP peer, run the peer capability-advertise add-path receive command to enable the RR to receive Add-Path routes from the specified BGP peer.
A device can send Add-Path routes to IBGP or EBGP peers, and Add-Path routes are advertised based on route advertisement rules.
If the peer advertise best-external command is run on a specified peer, the peer advertise best-external command is run in a specified peer group, and the peer is to be added to the peer group, the peer cannot inherit the function of the peer advertise best-external command from the peer group.

Example

# Set the maximum number of routes that the device can send to a peer to 3.

<HUAWEI> system-view
[~HUAWEI] bgp 100
[*HUAWEI-bgp] peer 2001:DB8:1::1 as-number 100
[*HUAWEI-bgp] ipv4-family vpnv4
[*HUAWEI-bgp-af-vpnv4] peer 2001:DB8:1::1 enable
[*HUAWEI-bgp-af-vpnv4] peer 2001:DB8:1::1 advertise add-path path-number 3