Configuring Bgp Peer Groups; Establishing The Configuration Task - Huawei S6700 Series Configuration Manual

S6700 Series Ethernet Switches
Configuration Guide - IP Routing
Checking the Configuration
After route aggregation is configured, you can check whether the configuration is correct.
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7.8 Configuring BGP Peer Groups

Configuring BGP peer groups simplifies the BGP network configuration and improves the route
advertisement efficiency.

7.8.1 Establishing the Configuration Task

Before configuring BGP peer groups, familiarize yourself with the applicable environment,
complete the pre-configuration tasks, and obtain the data required for the configuration. This
will help you complete the configuration task quickly and efficiently.
Applicable Environment
A BGP peer group consists of BGP peers that have the same update policies and configurations.
A large-scale BGP network has a large number of peers. Configuring and maintaining these
peers is difficult. To address this problem, configure a BGP peer group for BGP peers with the
same configurations. Configuring BGP peer groups simplifies peer management and improves
the route advertisement efficiency.
Based on the ASs where peers reside, peer groups are classified as follows:
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If a function is configured on a peer and its peer group, the function configured on the peer takes
precedence over that configured on the peer group. After a peer group is created, peers can be
added to the peer group. If these peers are not configured separately, they will inherit the
configurations of the peer group. If a peer in a peer group has a specific configuration
requirement, the peer can be configured separately. The configuration of this peer will override
the configuration inherited by the peer from the peer group.
Pre-configuration Tasks
Before configuring BGP peer groups, complete the following task:
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Data Preparation
To configure BGP peer groups, you need the following data.
Issue 01 (2012-03-15)
Run the display bgp routing-table [ network [ mask | mask-length ] ] command to check
information about BGP aggregated routes.
IBGP peer group: The peers of an IBGP peer group are in the same AS.
Pure EBGP peer group: The peers of a pure EBGP peer group are in the same external AS.
Mixed EBGP peer group: The peers of a mixed EBGP peer group are in different external
ASs.
Configuring Basic BGP Functions
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7 BGP Configuration
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