Configuring A Bgp Confederation - Huawei S6700 Series Configuration Manual

S6700 Series Ethernet Switches
Configuration Guide - IP Routing
Prerequisites
All BGP RR configurations are complete.
Procedure
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7.10 Configuring a BGP Confederation

BGP confederations can be configured on a large BGP network to reduce the number of IBGP
connections and simplify routing policy management, increasing route advertisement efficiency.
Applicable Environment
A confederations can be used to reduce the number of IBGP connections in an AS. It divides an
AS into several sub-ASs. Full-mesh IBGP connections are established between devices in each
sub-AS, and full-mesh EBGP connections are established between devices in different sub-ASs,
Compared with RRs, confederations facilitate IGP extensions.
Pre-configuration Tasks
Before configuring a BGP confederation, complete the following tasks:
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Procedure
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Run the display bgp vpnv4 { vpn-instance vpn-instance-name | all }peer [ [ ipv4-
address ] verbose ] command to check detailed information about BGP peers.
Run the display bgp routing-table [ network [ { mask | mask-length } [ longer-
prefixes ] ] ] command to check information in a BGP routing table.
Configuring link layer protocol parameters for interfaces to ensure that the link layer
protocol on the interfaces is Up
Configuring Basic BGP Functions
Configure a BGP confederation.
Perform the following steps on a BGP device:
1. Run:
system-view
The system view is displayed.
2. Run:
bgp as-number
The BGP view is displayed.
3. Run:
confederation id as-number
A confederation ID is set.
4. Run:
confederation peer-as as-number &<1-32>
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