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     rgephy — RealTek RTL8168/8169/8110/8211 series 10/100/1000 Gigabit Ethernet PHY driver


     To compile all available PHY drivers into the kernel, place the following line in your
     kernel configuration file:

           device miibus

     Alternatively, to selectively compile this driver into the kernel, place the following lines
     in your kernel configuration file instead:

           device mii
           device rgephy


     The rgephy driver supports the RealTek RTL8168, RTL8169, RTL8110 and RTL8211 series
     integrated 10/100/1000 Gigabit Ethernet PHYs.

     In order to get a list of media types and options supported by a specific instance of the
     rgephy driver, run ifconfig -m on the instance of its parent MAC driver.

     Additionally, the rgephy driver supports the following special media option:

     flag0  When manually setting media type and options via ifconfig(8), the rgephy driver by
            default also triggers an autonegotiation advertising the selected media.  This is
            done in order to work around hardware issues in certain scenarios.  It is believed
            that this behavior does not cause harm in general but in fact can have an adverse
            effect in edge cases.  In order to manually set the media type and options without
            also triggering an autonegotiation, the rgephy driver allows to turn this behavior
            off via the flag0 media option.

     Note that this special media option will not show up in the output of ifconfig(8), even when


     Manually set 100BASE-TX full-duplex without also triggering an autonegotiation:

           ifconfig re0 media 100baseTX mediaopt full-duplex,flag0


     intro(4), miibus(4), ifconfig(8)