Configuring a loopback interface – H3C Technologies H3C S12500-X Series Switches User Manual
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30.1.1.0/24 Direct 0 0 30.1.1.1 Vlan12
30.1.1.1/32 Direct 0 0 127.0.0.1 InLoop0
30.1.1.2/32 Direct 0 0 30.1.1.2 Vlan12
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
# Execute the display ip routing-table vpn-instance command on PE 1 and PE 2. The output shows that
the internal routes of the customer carrier network are present in the VPN routing tables, but the VPN
routes that the customer carrier maintains are not. Take PE 1 as an example:
[PE1] display ip routing-table vpn-instance vpn1
Routing Tables: vpn1
Destinations : 11 Routes : 11
Destination/Mask Proto Pre Cost NextHop Interface
1.1.1.9/32 ISIS 15 20 11.1.1.1 Vlan11
2.2.2.9/32 ISIS 15 10 11.1.1.1 Vlan11
5.5.5.9/32 BGP 255 0 4.4.4.9 NULL0
6.6.6.9/32 BGP 255 0 4.4.4.9 NULL0
10.1.1.0/24 ISIS 15 20 11.1.1.1 Vlan11
11.1.1.0/24 Direct 0 0 11.1.1.1 Vlan11
11.1.1.1/32 Direct 0 0 127.0.0.1 InLoop0
11.1.1.2/32 Direct 0 0 11.1.1.2 Vlan11
20.1.1.0/24 BGP 255 0 4.4.4.9 NULL0
21.1.1.0/24 BGP 255 0 4.4.4.9 NULL0
21.1.1.2/32 BGP 255 0 4.4.4.9 NULL0
# Execute the display ip routing-table command on CE 1 and CE 2. The output shows that the internal
routes of the customer carrier network are present in the public network routing tables, but the VPN routes
that the customer carrier maintains are not. Take CE 1 as an example:
[CE1] display ip routing-table
Routing Tables: Public
Destinations : 16 Routes : 16
Destination/Mask Proto Pre Cost NextHop Interface
1.1.1.9/32 ISIS 15 10 10.1.1.2 Vlan12
2.2.2.9/32 Direct 0 0 127.0.0.1 InLoop0
5.5.5.9/32 ISIS 15 74 11.1.1.2 Vlan11
6.6.6.9/32 ISIS 15 74 11.1.1.2 Vlan11
10.1.1.0/24 Direct 0 0 10.1.1.2 Vlan12
10.1.1.1/32 Direct 0 0 10.1.1.1 Vlan12
10.1.1.2/32 Direct 0 0 127.0.0.1 InLoop0
11.1.1.0/24 Direct 0 0 11.1.1.1 Vlan11
11.1.1.1/32 Direct 0 0 127.0.0.1 InLoop0
11.1.1.2/32 Direct 0 0 11.1.1.2 Vlan11
20.1.1.0/24 ISIS 15 74 11.1.1.2 Vlan11
21.1.1.0/24 ISIS 15 74 11.1.1.2 Vlan11
21.1.1.2/32 ISIS 15 74 11.1.1.2 Vlan11
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
# Execute the display ip routing-table command on PE 3 and PE 4. The output shows that the internal
routes of the customer carrier network are present in the public network routing tables. Take PE 3 as an
example: