H3C Technologies H3C S10500 Series Switches - Manual (Page 330)

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[CE1] bgp 200
[CE1-bgp] ipv4-family vpnv4
[CE1-bgp-af-vpnv4] peer 11.1.1.2 enable
# Allow the local AS number to appear in the AS-PATH attribute of the routes received.
[CE1-bgp-af-vpnv4] peer 11.1.1.2 allow-as-loop 2
# Disable VPN target based filtering of received VPNv4 routes.
[CE1-bgp-af-vpnv4] undo policy vpn-target
[CE1-bgp-af-vpnv4] quit
[CE1-bgp] quit
NOTE:
Configurations on PE 2 and CE 2 are similar to those on PE 1 and CE 1 respectively, and are thus omitted
here.
6. Establish MP-iBGP peer relationship between sub-VPN PEs and CEs of the customer VPN to
exchange VPNv4 routes of sub-VPNs.
# Configure PE 3.
[PE3] bgp 200
[PE3-bgp] peer 2.2.2.9 as-number 200
[PE3-bgp] peer 2.2.2.9 connect-interface loopback 0
[PE3-bgp] ipv4-family vpnv4
[PE3-bgp-af-vpnv4] peer 2.2.2.9 enable
# Allow the local AS number to appear in the AS-PATH attribute of the routes received.
[PE3-bgp-af-vpnv4] peer 2.2.2.9 allow-as-loop 2
[PE3-bgp-af-vpnv4] quit
[PE3-bgp] quit
# Configure CE 1.
[CE1] bgp 200
[CE1-bgp] peer 1.1.1.9 as-number 200
[CE1-bgp] peer 1.1.1.9 connect-interface loopback 0
[CE1-bgp] ipv4-family vpnv4
[CE1-bgp-af-vpnv4] peer 1.1.1.9 enable
[CE1-bgp-af-vpnv4] undo policy vpn-target
[CE1-bgp-af-vpnv4] quit
[CE1-bgp] quit
NOTE:
Configurations on PE 4 and CE 2 are similar to those on PE 3 and CE 1 respectively, and are thus omitted
here.
7. Verify the configurations.
Execute the display ip routing-table command on PE 1 and PE 2 to verify that the public routing tables
contain only routes on the service provider network. The following takes PE 1 as an exampleas an
example.
[PE1] display ip routing-table
Routing Tables: Public