A route-policy in Huawei's VRP is composed of if-match clauses for matching routes and apply clauses for modifying the attributes of those matched routes. The IP prefix defines the fundamental network destination of a route and is used as a primary matching condition within an if-match clause (e.g., if-match ip-prefix prefix-list-name). It is not an attribute that can be modified. The apply clause is used to set or change attributes of that route, such as its community, tag, or origin, but it cannot change the destination prefix itself.

A. community: The BGP community is a standard attribute that can be set, added to, or deleted within an apply clause using the apply community command.

C. tag: A route tag is a numerical value used for policy administration that can be set or modified in an apply clause using the apply tag command.

D. origin: The BGP origin attribute (IGP, EGP, or Incomplete) is a well-known mandatory attribute that can be explicitly set within an apply clause using the apply origin command.

1. Huawei NE40E Universal Service Router Configuration Guide - BGP (V800R011C10): This document details the configuration of route policies for BGP.

Section: Route-Policy Configuration > Configuring a Route-Policy: This section lists the available commands within a route-policy. The apply command is shown with options to modify attributes like community

origin

and tag. The ip-prefix is exclusively listed as a parameter for the if-match command

confirming it is a matching condition

not a modifiable attribute.

2. Huawei CloudEngine S12700 Series Switches Command Reference - IP Routing (V200R019C10): This command reference provides the syntax and usage for route-policy commands.

Section: Route-Policy Commands > apply: This section details the various parameters that can be used with the apply command. It includes apply community

apply origin

and apply tag. There is no apply ip-prefix command listed

reinforcing that the prefix is not a modifiable attribute in this context.

Section: Route-Policy Commands > if-match: This section explicitly shows the if-match ip-prefix command

confirming its role as a matching tool.