Interfaces Configuration Statements

When configuring the interfaces, you can configure the interfaces that are currently present in the routing platform (that is, the Physical Interface Cards [PICs] that are already installed in the routing platform) as well as interfaces that you might be adding at some future time (that is, PICs that you plan to install). To determine which interfaces are currently installed in the routing platform, issue the show interfaces terse operational mode command. If an interface is listed in the output, it is installed in the routing platform. If an interface is not listed, it is not present.

The JUNOS software automatically configures the routing platform's management Ethernet interface, fxp0, which is an out-of-band management interface, and the internal Ethernet interface, fxp1, which connects the Routing Engine with the routing platform's packet forwarding components. The JUNOS software also automatically configures one loopback interface (lo0). If your routing platform has a Tunnel PIC, the JUNOS software automatically configures one multicast tunnel interface (mt) for each virtual private network (VPN) you configure. You do not need to configure multicast tunnel interfaces.