Huawei Quidway NetEngine80E Configuration Manual page 933

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
Method
Configure an import or export policy and run
the apply local-preference command to
configure an apply clause for the policy.
The following example shows how the Local_Pref value is used during route selection. In
8-14, both ISP1 and ISP2 advertise the routes 10.11.0.0/16 and 10.22.0.0/16 to AS 65001.
Figure 8-14 Local_Pref application networking
Scenario 1: When no Local_Pref value is configured on Router A and Router B, check the BGP
routing tables of Router A and Router B.
[RouterA] display bgp routing-table
BGP Local router ID is 192.168.2.3
Status codes: * - valid, > - best, d - damped,
Issue 02 (2014-09-30)
Internet
10.11.0.0/16
10.22.0.0/16
ISP1
AS 100
10.1.1.1/30
EBGP
Client Network
AS 65001
10.1.1.2/30
10.1.3.1/30
RouterA
IBGP
10.1.4.1/30
IBGP
10.1.4.2/30
RouterC
h - history,
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Usage Scenario
This method sets different Local_Pref values
for different routes that the local device
advertises to IBGP peers.
NOTE
If both the methods are used, the method with the
import policy takes effect if routes match the
conditions specified in the apply local-
preference command and the policy.
ISP2
AS 200
10.1.2.1/30
EBGP
10.1.2.2/30
RouterB
10.1.3.2/30
10.1.5.1/30
IBGP
10.1.5.2/30
i - internal, s - suppressed, S - Stale
8 BGP Configuration
Figure
908