Thank you for your answer.
I tried that, but link-speed shows as empty:
# clish -c 'show interface SITELBRA' | grep -i speed
Then I tried:
# clish -c 'show internet-connections' | grep -i speed
# ethtool DMZ | grep -i speed
# cat /sys/class/net/DMZ/speed
So why do I see dmz-link-speed: 10/half and Speed: 100Mb/s?
I am sure it isn't negociated at 10Mbps because of high throughput in the DMZ interface. 100Mbps must be correct.
I am having issues with speed in the WAN interface, but if the "dmz-link-speed: 10/half" information is incorrect, how can I trust that the "wan-link-speed: 10/half" information is correct?
PS: I don't have access to the ISP router, so I can't check speed in it, but the model supports 1Gbps.