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# Platform Considerations

You can configure PPPoE interfaces on the following E-series routers:

- E120 router
- E320 router
- ERX-1440 router
- ERX-1410 router
- ERX-710 router
- ERX-705 router
- ERX-310 router

## Module Requirements

For information about the modules that support PPPoE interfaces on ERX-14xx models, ERX-7xx models, and the ERX-310 router:

- See ERX Module Guide, Table 1, Module Combinations for detailed module specifications.
- See ERX Module Guide, Appendix A, Module Protocol Support for information about the modules that support PPPoE.

For information about the modules that support PPPoE interfaces on the E120 router and the E320 router:

- See E120 and E320 Module Guide, Table 1, Modules and IOAs for detailed module specifications.
- See E120 and E320 Module Guide, Appendix A, IOA Protocol Support for information about the modules that support PPPoE.

## Interface Specifiers

The configuration task examples in this chapter use the slot/port[.subinterface ] format to specify the physical interface on which you want to configure PPPoE. However, the interface specifier format that you use depends on the router that you are using.

For ERX-7xx models, ERX-14xx models, and ERX-310 routers, use the slot/port[.subinterface ] format. For example, the following command specifies ATM 1483 subinterface 10 on slot 0, port 1 of an ERX-7xx model, ERX-14xx model, or ERX-310 router.

`

host1(config)#interface atm 0/1.10

`

For E120 and E320 routers, use the slot/adapter/port[.subinterface ] format, which includes an identifier for the bay in which the I/O adapter (IOA) resides. In the software, adapter 0 identifies the right IOA bay (E120 router) and the upper IOA bay (E320 router); adapter 1 identifies the left IOA bay (E120 router) and the lower IOA bay (E320 router). For example, the following command specifies ATM 1483 subinterface 20 on slot 5, adapter 0, port 0 of an E320 router.

`

host1(config)#interface atm 5/0/0.20

`

For more information about supported interface types and specifiers on E-series routers, see Interface Types and Specifiers in JUNOSe Command Reference Guide.

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