aggregate default-route

Function

The aggregate default-route command enables a BGP device to summarize the routes that match a specified IPv4 prefix list into a summary default route.

The undo aggregate default-route command restores the default configuration.

By default, BGP cannot summarize the routes that match a specified IPv4 prefix list into a summary default route.

Format

aggregate default-route origin-ip-prefix ip-prefix-name [ attribute-policy attribute-policy-name ]

undo aggregate default-route

undo aggregate default-route origin-ip-prefix ip-prefix-name [ attribute-policy attribute-policy-name ]

Parameters

Parameter	Description	Value
attribute-policy attribute-policy-name	Specifies the name of an attribute route-policy for the summary default route.	The value is a string of 1 to 200 characters.
origin-ip-prefix ip-prefix-name	Specifies the name of an IPv4 prefix list.	The value is a string of 1 to 169 characters and cannot contain spaces.

Parameter

Description

Value

attribute-policy attribute-policy-name

Specifies the name of an attribute route-policy for the summary default route.

The value is a string of 1 to 200 characters.

origin-ip-prefix ip-prefix-name

Specifies the name of an IPv4 prefix list.

The value is a string of 1 to 169 characters and cannot contain spaces.

Views

BGP-IPv4 unicast address family view, BGP view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
bgp	write

Usage Guidelines

Usage Scenario

To enable a BGP device to summarize the routes that match a specified IPv4 prefix list into a summary default route, run the aggregate default-route command. For details about the usage scenario, see "IP Routing" > "BGP Configuration" > "Configuring BGP to Generate a Summary Default Route" in the related configuration guide.

Prerequisites

An IPv4 prefix list has been configured using the ip ip-prefix command.

Precautions

The number of entries in the IPv4 prefix list specified in the aggregate default-route command cannot exceed 200.

Example

# Enable a BGP device to summarize the routes that match an IPv4 prefix list into a summary default route.

<HUAWEI> system-view
[~HUAWEI] ip ip-prefix p1 index 10 permit 192.168.1.1 29
[*HUAWEI] bgp 100
[*HUAWEI-bgp] ipv4-family unicast
[*HUAWEI-bgp-af-ipv4] aggregate default-route origin-ip-prefix p1

# Enable a BGP device to summarize the routes that match an IPv4 prefix list into a summary default route and specify an attribute route-policy for the summary default route.

<HUAWEI> system-view
[~HUAWEI] ip ip-prefix prefix-a index 10 permit 192.168.1.0 24
[*HUAWEI] route-policy policy1 permit node 10
[*HUAWEI-route-policy] if-match ip-prefix prefix-a
[*HUAWEI-route-policy] apply cost 100
[*HUAWEI-route-policy] quit
[*HUAWEI] bgp 100
[*HUAWEI-bgp] ipv4-family unicast
[*HUAWEI-bgp-af-ipv4] aggregate default-route origin-ip-prefix prefix-a attribute-policy policy1