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Configuration procedure 
1.  Configure IP addresses for interfaces. (Details not shown.) 
2.  Configure EBGP connections: 
# Configure Router A. 
<RouterA> system-view 
[RouterA] bgp 10 
[RouterA-bgp] router-id 1.1.1.1 
[RouterA-bgp] peer 200.1.2.2 as-number 20 
[RouterA-bgp] address-family ipv4 unicast 
[RouterA-bgp-ipv4] peer 200.1.2.2 enable 
[RouterA-bgp-ipv4] network 9.1.1.0 255.255.255.0 
[RouterA-bgp-ipv4] quit 
[RouterA-bgp] quit 
# Configure Router B. 
<RouterB> system-view 
[RouterB] bgp 20 
[RouterB-bgp] router-id 2.2.2.2 
[RouterB-bgp] peer 200.1.2.1 as-number 10 
[RouterB-bgp] peer 200.1.3.2 as-number 30 
[RouterB-bgp] address-family ipv4 unicast 
[RouterB-bgp-ipv4] peer 200.1.2.1 enable 
[RouterB-bgp-ipv4] peer 200.1.3.2 enable 
[RouterB-bgp-ipv4] quit 
[RouterB-bgp] quit 
# Configure Router C. 
<RouterC> system-view 
[RouterC] bgp 30 
[RouterC-bgp] router-id 3.3.3.3 
[RouterC-bgp] peer 200.1.3.1 as-number 20 
[RouterC-bgp] address-family ipv4 unicast 
[RouterC-bgp-ipv4] peer 200.1.3.1 enable 
[RouterC-bgp-ipv4] quit 
[RouterC-bgp] quit 
# Display the BGP route 9.1.1.0 on Router B. 
[RouterB] display bgp routing-table ipv4 9.1.1.0 
 
 BGP local router ID: 2.2.2.2 
 Local AS number: 20 
 
 Paths:   1 available, 1 best 
 
 BGP routing table information of 9.1.1.0/24: 
 From            : 200.1.2.1 (1.1.1.1) 
 Relay nexthop   : 200.1.2.1 
 Original nexthop: 200.1.2.1 
 OutLabel        : NULL 
 AS-path         : 10