Gigabit Problem Asus RT-N18U

Discussion in 'Tomato Firmware' started by jsnepo, Jan 5, 2019.

  1. jsnepo

    jsnepo Networkin' Nut Member

    I can't seem to get gigabit speeds on some of my devices even though they are supported. I have Freshtomato 2018.2 K26ARM USB AIO-64K-NOSMP installed.

    PC - updated drivers, tried old drivers too

    Tried manual negotiation for my PC and PS3. PC still connected at 100Mbps, PS3 lost its connection.


    Tried checking cables. Used cables for PC and PS3 on PS4 and got gigabit speeds so I don't think cables are the cause. Tried exchanging ports too and PS4 got gigabit speeds on all four LAN ports. WAN runs at gigabit speeds too. QoS is disabled.

    Am I missing something here?
  2. Sean B.

    Sean B. Network Guru Member

    So when the PC or PS3 are connected to the router, the router's GUI status page shows those ports as a 100M link speed? Are you certain your PC and PS3 have GiG capable NIC's?
  3. txnative

    txnative Addicted to LI Member

    Prior to installing freshtomato did your erase the nvram? Do you have cable modem? Has this router been in your network before installing fresthomato? The nosmp only relates to 1 processor being used, I'm sure you know the RTN18U is build with only 1 but that shouldn't interfere with the performance and can handle plenty of bandwidth still.
  4. Monk E. Boy

    Monk E. Boy Network Guru Member

    It sounds like the PS3 needs to have GigE manually enabled in settings otherwise it will default to Fast Ethernet (100Mb).

    What grade cabling is in use here? I know you have tried it with the PS4 but what specification is written on the cables themselves? They print the category and other information on the cable jacket. I ask this because I've encountered a LOT of people trying to use Cat 5 cables lately, and you need at least 5e, preferably 6, for GigE. Just look on the jacket, it'll list a lot of information and even if it doesn't explicitly print the category I could deduce what grade cable it is based on what's printed on it (The mhz rating is what determines the grade).

    What NIC do you have in your PC? Intel? Realtek? Broadcom?
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