The function of the Local_Pref attribute is similar to that of the preferred value of BGP4+
routing information. The preferred value of BGP4+ routing information takes precedence
over the Local_Pref attribute.
l MED attribute
After the MED attribute is configured, EBGP peers select the route with the smallest MED
value when the traffic enters an AS.
l Next_Hop attribute
A route with an unreachable next hop is ignored.
l Community attribute
The community attribute can simplify the management of routing policies. The
management range of the community attribute is wider than that of the peer group. The
community attribute can control the routing policies of multiple BGP4+ routers.
l AS_Path attribute
After the AS_Path attribute is configured, the route with a shorter AS path is selected.
Pre-configuration Tasks
Before configuring BGP4+ route attributes, complete the following tasks:
l Configuring Basic BGP4+ Functions
Data Preparation
To configure BGP4+ route attributes, you need the following data.
No.
Data
1 AS number
2 Protocol priority
3 Local_Pref
4 MED
5 Name of the routing policy for using the community attribute
8.4.2 Configuring the BGP4+ Preference
Setting the BGP4+ preference can affect route selection between BGP4+ and another routing
protocol.
Context
Do as follows on the BGP4+ router:
Procedure
Step 1 Run:
system-view
S6700 Series Ethernet Switches
Configuration Guide - IP Routing 8 BGP4+ Configuration
Issue 01 (2012-03-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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