hi there.
i have high error pkts in downstream which i believe is the reason behind the internet slow connection. here are the numbers of the internet:

                                               upstream             downstream

current rate (kbps)                      517                     2047
max rate (kbps)                          1249                   3108
SNR margin (dB)                          26                      5.2
line attenuation(dB)                     25.9                   43.2.
Errors (pkts)                                   0                     24536

please help me to solve this issue

Note* i have 2 routers connected to the main router by LAN caple with different IP addresses