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

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 group-name advertise add-path path-number path-number

undo peer group-name advertise add-path

Parameters

Parameter	Description	Value
group-name	Specifies the name of a peer group.	The name is a string of 1 to 47 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.
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

group-name

Specifies the name of a peer group.

The name is a string of 1 to 47 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.

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

You need to run the peer capability-advertise add-path receive command on a peer so that the peer can have Add-Path routes from the specified RR.
The RR can send Add-Path routes only to IBGP peers, and Add-Path routes are advertised based on BGP route advertisement rules.
If a peer is specified when the peer advertise add-path command is run, a peer group is specified when the peer advertise best-external command is run, and then the peer is added to the peer group, the peer cannot inherit the configuration 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 group to 3.

<HUAWEI> system-view
[~HUAWEI] bgp 100
[~HUAWEI-bgp] group a internal
[~HUAWEI-bgp] ipv4-family vpnv4
[~HUAWEI-bgp-af-vpnv4] peer a enable
[~HUAWEI-bgp-af-vpnv4] peer a advertise add-path path-number 2