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:

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