Pinging the Remote CE Router from the Local PE Router

The following procedure is effective for Layer 3 VPNs only. To ping a remote CE router from a local PE router in a Layer 3 VPN, you need to configure the following:

1. Configure a logical unit for the loopback interface.

   To configure an additional logical unit on the loopback interface of the PE router, configure the unit statement at the [edit interfaces lo0] hierarchy level:

   [edit interfaces]

   lo0 {

   unit number {

   family inet {

   address address;

   }

   }

   }

2. Configure the loopback interface for the Layer 3 VPN routing instance on the local PE router. You can associate one logical loopback interface with each Layer 3 VPN routing instance, enabling you to ping a specific routing instance on a router.

   Specify the loopback interface you configured in Step Step 1 using the interface statement at the [edit routing-instances routing-instance-name] hierarchy level:

   [edit routing-instances routing-instance-name]

   interface interface-name;

   The interface-name is the logical unit on the loopback interface (for example, lo0.1).

3. From the VPN interface on PE router, you can now ping the logical unit on the loopback interface on the remote CE router:

   user@host> ping interface interface host

   Use interface to specify the new logical unit on the loopback interface (for example, lo0.1). For more information on how to use the ping interface command, see the JUNOS Interfaces Command Reference.

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