Question about an H5100 Ethernet connection

[derpne]

I have an old H5100 Blu-ray player with a manual, wired setup.   Recently, I upgraded an old Cat5 cable to a Cat8 cable, and now the Gateway ping is not recognizing the player.  The network on the Blu-ray player states it is connected to my modem/router, but the modem/router ARP does not list the Blu-ray's static IP address.

The player was working fine with the Cat5 cable, but it was slow as ^*#%.

So now I wonder:  does this device recognize Cat8? 

Does anyone know?

Also, if not, does anyone know if this device would at least recognize a Cat6?

Thank you!

P.S.  While I appreciate offers for new cables, I only need knowledge of the highest speed cable that the H5100 can use.

[LiquidSnake]

I have a new CAT.5e that should improve the speed. Link is below.
https://www.shpock.com/en-gb/i/YJgS2Jte3AdAZnHU/ethernet-1-5m-length-lead-patch-cable-yellow

[derpne]

Thank you for the offer; however, I use 25-foot cables to go from our modem to our H5100, as they sit a room away from each other. 

Do you know the most recent cable version the H5100 can use, by they way?  Have you used a Cat5.e instead of the Cat5, and have you ever tried the Cat6?

[antikythera · Accepted solution]

Cat6 are backwards compatible so should be okay, however don't expect any speed boosts whatever cable you end up using. 25 feet of Cat5 indoors is not going to be a bottleneck even over gigabit LAN at that length.

[derpne]

I will buy a Cat6 and see how it goes!  I did not know they were backwards compatible; this is important.

And, yes, at 25 feet, it is a stretch.  I thought about repeaters, but they run a penny or two.

[antikythera]

25 feet is nothing, I have a 30m Cat5 from the router to my home office and still get gigabit LAN file transfers to and from the NAS at full speed. Comparing with my laptop on a 3 feet cable next to the router there's no drop off.