H3C Technologies H3C S12500-X Series Switches - Manual (Page 162)

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[Hub-PE-bgp] peer 3.3.3.9 connect-interface loopback 0
[Hub-PE-bgp] address-family vpnv4
[Hub-PE-bgp-vpnv4] peer 1.1.1.9 enable
[Hub-PE-bgp-vpnv4] peer 3.3.3.9 enable
[Hub-PE-bgp-vpnv4] quit
[Hub-PE-bgp] quit
After completing the configurations, execute the display bgp peer vpnv4 command on the PEs. The
output shows that a BGP peer relationship has been established between the PEs and has reached
the Established state.
Verifying the configuration
# Execute the display ip routing-table vpn-instance command on the PEs to view the routes to the CEs.
The next hop of the route from a Spoke-PE to its connected Spoke-CE is Hub-PE. Take Spoke-PE 1 as an
example:
[Spoke-PE1] display ip routing-table vpn-instance vpn1
Routing Tables: vpn1
Destinations : 8 Routes : 8
Destination/Mask Proto Pre Cost NextHop Interface
10.0.0.0/24 BGP 255 0 2.2.2.9 NULL0
10.1.1.0/24 Direct 0 0 10.1.1.2 Vlan2
10.1.1.2/32 Direct 0 0 127.0.0.1 InLoop0
10.2.1.0/24 BGP 255 0 2.2.2.9 NULL0
10.3.1.0/24 BGP 255 0 2.2.2.9 NULL0
10.4.1.0/24 BGP 255 0 2.2.2.9 NULL0
127.0.0.0/8 Direct 0 0 127.0.0.1 InLoop0
127.0.0.1/32 Direct 0 0 127.0.0.1 InLoop0
# Spoke-CE 1 and Spoke-CE 2 can ping each other. The TTL value indicates that traffic from Spoke-CE
1 to Spoke-CE 2 passes six hops (255-250+1) and is forwarded through Hub-CE. Take Spoke-CE 1 as an
example:
[Spoke-CE1] ping 10.2.1.1
Ping 10.2.1.1 (10.2.1.1): 56 data bytes, press CTRL_C to break
56 bytes from 10.2.1.1: icmp_seq=0 ttl=250 time=1.000 ms
56 bytes from 10.2.1.1: icmp_seq=1 ttl=250 time=2.000 ms
56 bytes from 10.2.1.1: icmp_seq=2 ttl=250 time=0.000 ms
56 bytes from 10.2.1.1: icmp_seq=3 ttl=250 time=1.000 ms
56 bytes from 10.2.1.1: icmp_seq=4 ttl=250 time=0.000 ms
--- Ping statistics for 10.2.1.1 ---
5 packet(s) transmitted, 5 packet(s) received, 0.0% packet loss
round-trip min/avg/max/stddev = 0.000/0.800/2.000/0.748 ms
Configuring MPLS L3VPN inter-AS option A
Network requirements
CE 1 and CE 2 belong to the same VPN. CE 1 accesses the network through PE 1 in AS 100, and CE
2 accesses the network through PE 2 in AS 200.