xpl ip-prefix-list

Function

The xpl ip-prefix-list command creates an IPv4 prefix set and displays the IPv4 prefix set view.

The undo xpl ip-prefix-list command deletes a specified IPv4 prefix set.

By default, no IPv4 prefix sets are configured.

Format

xpl ip-prefix-list ip-prefix-list-name

undo xpl ip-prefix-list ip-prefix-list-name

Parameters

Parameter	Description	Value
ip-prefix-list-name	Specifies the name of an IPv4 prefix set.	The value is a string of 1 to 200 case-sensitive characters, spaces not supported. The string can contain letters, digits, underscores (_), hyphens (-), and dots (.). It must start with a letter or digit.

Parameter

Description

Value

ip-prefix-list-name

Specifies the name of an IPv4 prefix set.

The value is a string of 1 to 200 case-sensitive characters, spaces not supported. The string can contain letters, digits, underscores (_), hyphens (-), and dots (.). It must start with a letter or digit.

Views

System view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
route-base	write

Usage Guidelines

Usage Scenario

An IPv4 prefix set is a group of IPv4 prefix data used by a route-filter to filter BGP routes based on route attributes, such as the source, destination, or next hop IP address. To create an IPv4 prefix set and enter the IPv4 prefix set view, run the xpl ip-prefix-list command.

Follow-up Procedure

Configure elements (IPv4 addresses with masks, 1.1.1.0 24 for example) for the set in the IPv4 prefix set view and separate every two neighboring elements with a comma (,). You can use eq, ge, or le to specify the mask length. For example, 1.1.1.0 24 ge 26 le 30 matches the routes in network segment 1.1.1.0/24 with the mask length ranging from 26 to 30 bits.
Run the end-list command in the IPv4 prefix set view to conclude the configuration of the IPv4 prefix set.

Precautions

An IPv4 prefix set is only a group of data used as matching rules and does not have the permit or deny function. Therefore, an IPv4 prefix set can be used to filter routes only after it is referenced by a route-filter.

To exit from the IPv4 prefix set view, run the abort command in the IPv4 prefix set view.

Example

# Configure an IPv4 prefix set named ipv4-list1.

<HUAWEI> system-view
[~HUAWEI] xpl ip-prefix-list ipv4-list1
[~HUAWEI-xpl-pfx] 1.1.1.1 32,
[~HUAWEI-xpl-pfx] 2.2.2.2 32,
[~HUAWEI-xpl-pfx] 3.3.3.0 24
[~HUAWEI-xpl-pfx] end-list