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Example: Creating an Interface on a Logical System

Requirements

For the interface on the logical system to have connectivity, the corresponding physical interface must be administratively up, and the physical link must be up. You can verify the status of the physical interface by running the show interfaces terse command.

Overview

In logical systems, you must treat each interface like a point-to-point connection because you can only connect one logical tunnel interface to another at any given time. Also, you must select an interface encapsulation type, specify a DLCI number or VLAN identifier, configure a corresponding protocol family, and set the logical interface unit number of the peering lt interface.

• M Series, MX Series, or T Series router (master administrator only)—[edit interfaces lt-fpc/pic/0 unit unit-number]
• Logical system—[edit logical-systems logical-system-name interfaces lt-fpc/pic/0 unit unit-number]
  [edit]logical-systems logical-system-name {interfaces {lt-fpc/pic/0 {unit unit-number {encapsulation (ethernet | ethernet-ccc | ethernet-vpls | frame-relay | frame-relay-ccc | vlan | vlan-ccc | vlan-vpls);peer-unit number; # The logical unit number of the peering lt interface.dlci dlci-number; vlan-id vlan-number;family (ccc | inet | inet6 | iso | mpls | tcc);}}}}

  Note: When you configure IPv6 addresses on a logical tunnel interface, you must configure unique IPv6 link-local addresses for any logical interfaces that peer with one another. To configure a link-local address, you must be the master administrator. Include a second IPv6 address with the address statement at the [edit interfaces lt-fpc/pic/port unit unit-number family inet6] hierarchy level. Link-local addresses typically begin with the numbers fe80 (such as fe80::1111:1/64).

Configuration

CLI Quick Configuration

To quickly configure this example, copy the following commands, paste them into a text file, remove any line breaks, change any details necessary to match your network configuration, and then copy and paste the commands into the CLI at the [edit] hierarchy level.

Step-by-Step Procedure

1. As the master administrator, configure the physical interface on the main router.

   [edit]user@host# set interfaces fe-1/1/3 description "main router interface"

2. Create the logical system interface on the logical unit.

   [edit]user@host# set logical-systems LS1 interfaces fe-1/1/3 unit 0 description "LS1 interface" user@host# set logical-systems LS1 interfaces fe-1/1/3 unit 0 family inet address 10.11.2.2/24

3. If you are done configuring the device, commit the configuration.

   [edit]user@host# commit

Verification

To verify that the configuration is working properly, issue the show interfaces command.