Motherboard downgraded ethernet bandwidth by itself

[lidzet]

Hi
Today i noted that Ethernet port on my Motherboard has been downgraded to 100 Mb/s from
1 Gb/s. What is the reason ? and how to fix it ?
Motherboard: Asus h97 pro-gamer

 

[Paul NZ]

Is it connected to a gigabit Ethernet port on the modem

 

[secolliyn]

How is going from 100 Mb/s ------------ to 1000 Mb/s equivalent to 1Gb/s a downgrade?

 

[Phillip Corcoran]

How is going from 100 Mb/s ------------ to 1000 Mb/s equivalent to 1Gb/s a downgrade?

The OP didn't say that, he said it's dropped from 1000 to 100

Take more care when reading dude!