Hello

We have installed for our customer TL-ER6020 V2, firmware version TL-ER6020v2_un_2.0.2_20180702-rel59031_up.bin. On WAN we have 200/100 download / upload, so we have WAN uplink connected via CAT 5e cable and port set to Auto aka auto negotiation of speed and duplex.

When we connect any client (PC, NAS, another router,etc.) not with CAT 5e 4-pair cable, but with CAT5 cable with only 2-pair of wires, speed and duplex is still Auto, then we will never receive full speed. The speed is jamed around 30-50 mbit/s. WEb managmeent shows negotiated speed 100M, full duplex. Setting speed manually on both sides not change anything.

On TL-R6000VPN, TL-ER5120, TL-R470T+ or any other SMB routers, same topology works with full 100M speed. Please advise if there is need any special action, or if it´s bug in firmware, please advise if there is some on which speed/duplex negotiation works alright. We have tested 6 TL-ER6020 V2 and all these does same speed, with this settings.

Thanks

ProML_CZ