To further expand on this:
fabric isl enable
fabric trunk enable
are default for all ports on NetworkOS switches.
Negating the first command will simply put an ISL in Admin Down status. Negating the second will stop the ISL from attempting to form a trunk with other ISLs in the same port group. As previously stated, these commands are ignored on a 1Gbps link as ISLs are supported on 10Gbps and up.
Also configuring any port as a “switchport” will cause these commands to be ignored on a port of any speed.
If you are looking into a licencing issue I would also recommend you use the command:
This will tell you all the ports that are assigned to your base switch licence as well as any add on licence you have installed. With that said I doubt you have a license issue. Ports that are not licensed can be configured, however once the “no shutdown” command is issued the port will automatically remove all configuration and revert to the Admin Down state.
If your ports are UP/Down or UP/UP and not transmitting traffic I would recommend looking into a Layer 2/control plane issue and/or a config issue. Also it is possible that the ASIC could be encountering Parity Errors which you can verify with the following:
errdumpall | grep ASIC
If you are seeing a pattern of regularly occurring ASIC errors please reload your switch and confirm if the issue persists.
If you need further support I would recommend contacting our support department and creating a case for us to look into.
Principal Technical Support Engineer – Switching, Routing & Analytics