Zte ZXR10 GER, Руководство пользователя

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Chapter 16 BGP Configuration
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In this example, the route-map command and the access list
command access-list are used to prevent R1 from advertising
prefix 192.18.10.0/24 to AS200.
This command can also be used to filter certain network prefix to
be advertised.
ZXR10(config-router)#bgp filter out deny peer-ip 182.17.20.1
network 192.18.10.0 0.0.0.255
Route Filtering by Means of
AS_PATH
If all routers in one or multiple ASs need filtering, normally route
filtering based on AS path information is used. This filtering
method can avoid the complexity caused by prefix-based
filtering.
Refer to below procedure for route filtering by means of
AS_PATH configuration on ZTE ZXR10 GER.
„
Router Command Line Interface has been accessed.
„
BGP is running on a network.
1. To configure route filtering by means of AS_PATH, use ip as-
path access-list < access-list-number > { permit|deny }
< as-regular-expression > command in global config mode as
shown in Table 292.
T
A B L E
2 9 2 I
P
A
S
- P
A T H
A
C C E S S
- L
I S T
C
O M M A N D
Command Format
Command
Mode Command
Function
ip as-path access-list
< access-list-number >
{ permit|deny } < as-
regular-expression >
Global
This defines BGP
access list
Result: This configures an ip as-path access list.
E
ND OF STEPS
Example: As shown in Figure 98 , router filtering based on AS
path also can be used so that R1 will not advertise the network
192.18.10.0/24 from AS300 to AS200. The configuration is as
follows:
Introduction
Purpose
Prerequisite
Steps