If you have the panel ports visible ( ifconfig -a shows swpX ports) then you dont need any extra license. You already have it installes.
You can check it with "sudo cl-license"
If ethtool -m swp1 shows nothing theb either thr cable is not connected or the cable doesnt support the feature.
Thank you for your answer. I don't think I have the panel ports visible. Because when I input the command " ifconfig -a show cumulus port' . It shows "SIOCSIFADDR: Operation not permitted", I check it with "sudo cl-license" and it shows "
978506265.872703 2001-01-03 07:17:45 license.c:318 CRIT No license file. No license installed!". And I remember the switch was reseted back to factory defaluts ,Will there be a connection between them?
I have collected the related inforamtion and pls find the attachment for your reference.Thank you!
SN2100.doc 22.0 KB