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 set.