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    Fast Ethernet I/O Modules Overview

    Fast Ethernet interfaces are supported on two I/O modules: the FE-8 I/O module and the FE-8 SFP I/O module.

    FE-8 I/O Module

    ERX7xx models, ERX14xx models, and the ERX310 router all support the FE-8 I/O module.

    An FE-8 I/O module accepts up to eight RJ-45 connectors.

    FE-8 SFP I/O Module

    ERX7xx models, ERX14xx models, and the ERX310 router all support the FE-8 SFP I/O module.

    The FE-8 SFP I/O module uses a range of small form-factor pluggable transceivers (SFPs) to support different optical modes and cabling distances. The I/O module supports up to eight LC-style fiber-optic connectors.

    Unlike all other Fast Ethernet and Gigabit Ethernet I/O modules, the FE-8 SFP I/O module does not support automatic negotiation of the line speed and duplex mode by the router. For more information, see Configuring the Duplex Mode and Configuring the Line Speed in Configuring the Physical Interface.

    Published: 2014-08-14