Check the link LEDs
First, check the CPRI board on the Tiogapass, the port where the fiber link is connected should have a green LED above it. If it is red, it means the cables are not properly plugged or there is a driver issue. If it is off, then it means you plugged the fiber to the wrong port (only three are active, those which have the LED on).
Check the cables
Please try switching the fiber optics.
Check the driver
Check if the board is recognized:
lspci -vvv | grep Swallow
Check the service status:
systemctl status rmu
systemctl status swallow
screen -x lte
If the LED is green
Get RF RX and TX levels
You can get more details about the RRH with the RMU:
sudo screen -x rmu
Then (if the RRH is plugged on swallow port 0):
swa:0/port:0/node:0 info -r
There you will see the RF Tx and R level.
SSH to the RRH
For more debugging, you can connect to the RRH through SSH:
ssh user@192.168.127.10
(password: 4fgd6AE7)
> radio -t transmit -p