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Configuring Tunnel Interfaces on MX Series Routers

Because the MX Series routers do not support Tunnel Services PICs, you create tunnel interfaces on MX Series routers by including the following statements at the [edit chassis] hierarchy level:

[edit chassis]
fpc slot-number {pic number {tunnel-services {bandwidth (1g | 10g | 20g | 40g);}}}

fpc slot-number is the slot number of the DPC, MPC, or MIC. On the MX80 router, the range is 0 through 1. On other MX series routers, 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.

The pic number On MX80 routers, if the FPC is 0, the PIC number can only be 0. If the FPC is 1, the PIC range is 0 through 3. For all other MX series routers, the range is 0 through 3.

bandwidth (1g | 10g | 20g | 40g) is the amount of bandwidth to reserve for tunnel traffic on each Packet Forwarding Engine.

Note: When you use MPCs and MICs, tunnel interfaces are soft interfaces and allow as much traffic as the forwarding-path allows, so it is advantageous to setup tunnel services without artificially limiting traffic by use of the bandwidth option. However, you must specify bandwidth when configuring tunnel services for MX Series routers with DPCs or FPCs. The GRE key option is not supported on the tunnel interfaces for DPCs on MX960 routers.

Bandwidth rates of 20 gigabits per second and 40 gigabits per second require use of an MX Series router with the 100-Gigabit Ethernet Modular Port Concentrator (MPC) and the 100-Gigabit CFP MIC.

1g indicates that 1 gigabit per second of bandwidth is reserved for tunnel traffic.

10g indicates that 10 gigabits per second of bandwidth is reserved for tunnel traffic.

20g indicates that 20 gigabits per second of bandwidth is reserved for tunnel traffic.

40g indicates that 40 gigabits per second of bandwidth is reserved for tunnel traffic.

If you specify a bandwidth that is not compatible, 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.

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.

 

Related Documentation

 

Published: 2013-02-15

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