Special Interfaces

Special interfaces include management interfaces, which are primary intended for accessing the device remotely, the loopback interface, which has several uses, depending on the particular Junos OS feature being configured, and the discard interface.

Table 6 describes special interfaces for SRX Series Services Gateways and J Series Services Routers.

Table 6: Special Interfaces

Interface Name	Description
fxp0, fxp1	On J Series devices, the fxp0 interface is the management port, and fxp1 is used as the control link interface in a chassis cluster. On SRX Series devices, the fxp0 management interface is a dedicated port located on the Routing Engine.
lo0	Loopback address. The loopback address has several uses, depending on the particular Junos feature being configured.
dsc	Discard interface

Special Interfaces

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