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# VPWS Platform Considerations

VPWS is supported on all E-series routers:

## Module Requirements

You can configure VPWS on all E-series module combinations that support MPLS tunnels.

For information about the modules that support VPWS on ERX-14xx models, ERX-7xx models, and ERX-310 routers:

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

For information about the modules that support VPWS on E120 routers and E320 routers:

- 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 VPWS network interfaces and VPWS virtual core interfaces.

## Interface Specifiers

The configuration task examples in this chapter use the slot/port[.subinterface ] format to specify the physical interface on which to configure an VPWS L2VPN network interface. 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 Fast Ethernet subinterface 6 on port 2 of the I/O module installed in slot 3 of an ERX-7xx model, ERX-14xx model, or ERX-310 router.

`

host1(config)#interface fastEthernet 3/2.6

`

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 Gigabit Ethernet subinterface 20 on port 1 of the IOA installed in the upper adapter bay (adapter 0) of slot 4 in an E320 router.

`

host1(config)#interface gigabitEthernet 4/0/1.20

`

#### Related Topics

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

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