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Configuring Tunnel Interfaces on MX-Series Ethernet Services Routers

The MX-series routing platforms do not use FPCs. The DPC combines the functions of four FPCs and the PICs. The MX960 has 12 DPC slots. The MX480 has 7 DPC slots. The MX240 has 4 DPC slots. Each DPC has either 40 Gigabit Ethernet ports or 4 10-Gigabit Ethernet ports.

Because the MX-series routers do not support Tunnel PICs, you configure a DPC and corresponding Packet Forwarding Engine to use for tunneling services at the [edit chassis] hierarchy level. You also configure the amount of bandwidth reserved for tunnel services. The JUNOS software creates tunnel interfaces on the Packet Forwarding Engine. To create tunnel interfaces on MX-series routers, include the following statements at the [edit chassis] hierarchy level:



[edit chassis]

fpc slot-number {


pic number {



tunnel-services {

bandwidth (1g | 10g);
}


}


}

fpc slot-number is the slot number of the DPC. If two SCBs are installed, the range is 0 through 11. If three SCBs are installed, the range is 0 through 5 and 7 through 11.

pic number is the number of the Packet Forwarding Engine on the DPC. The range is 0 through 3.

bandwidth (1g | 10g) is the amount of bandwidth to reserve for tunnel traffic on each Packet Forwarding Engine.

1g indicates that 1 Gbps of bandwidth is reserved for tunnel traffic. Configure this option only for a Packet Forwarding Engine on a Gigabit Ethernet 40-port DPC.

10g indicates that 10 Gbps of bandwidth is reserved for tunnel traffic. Configure this option only for a Packet Forwarding Engine on a 10-Gigabit Ethernet 4-port DPC.

If you specify a bandwidth that is not compatible with the type of DPC and Packet Forwarding Engine, tunnel services are not activated. For example, you cannot specify a bandwidth of 1 Gbps for a Packet Forwarding Engine on a 10-Gigabit Ethernet 4-port DPC.

When you configure tunnel interfaces on the Packet Forwarding Engine of a 10-Gigabit Ethernet 4-port DPC, the Ethernet interfaces for that port are removed from service and are no longer visible in the CLI. The Packet Forwarding Engine of a 10-Gigabit Ethernet 4-port DPC supports either tunnel interfaces or Ethernet interfaces, but not both. Each port on the 10-Gigabit Ethernet 4-port DPC includes two LEDs, one for tunnel services and one for Ethernet services, to indicate which type of service is being used. On the Gigabit Ethernet 40-port DPC, you can configure both tunnel and Ethernet interfaces at the same time.

To verify that the tunnel interfaces have been created, issue the show interfaces terse operational mode command. For more information, see the JUNOS Interfaces Command Reference.

For additional information about tunnel services, see the “ Tunnel Services” chapter in the JUNOS Services Interfaces Configuration Guide.

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