Huawei Quidway NetEngine80E Configuration Manual page 850

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
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To address these problems, prefix-based BGP ORF is used to implement on-demand BGP route
advertisement. A BGP device uses an export policy provided by a route receiving device to filter
routes before sending these routes. It is unnecessary for the local device to provide a separate
export policy for each BGP peer. As a result, the loads of the two communication devices,
network bandwidth consumption, and configuration workload are reduced.
Pre-configuration Tasks
Before configuring prefix-based BGP ORF, complete the following tasks:
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Data Preparation
To configure prefix-based BGP ORF, you need the following data.
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Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
bgp { as-number-plain | as-number-dot }
The BGP view is displayed.
Step 3 Run:
ipv4-family unicast
The IPv4 unicast address family view is displayed.
Issue 02 (2014-09-30)
If a routing policy is used to filter routing information received by the route receiving device
but no policy is used to filter routing information to be sent by the route sending device
and the route sending device sends a great deal of routing information, the route receiving
device will have to process a great deal of unwanted routing information. This consumes
a lot of network bandwidth resources.
If routes to be advertised by the route sending device need to be filtered and the device has
many BGP peers, many export policies need to be configured on the device. This is
unhelpful for network planning and maintenance and consumes lots of memory resources.
NOTE
Currently, only prefix-based export policies are supported.
Configuring Basic BGP Functions
Configuring an IPv4 Prefix List
Data
Address of a peer or name of a peer group
Name of an IP prefix list
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8 BGP Configuration
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