The information in the " Native VLAN " column for port23 on the FortiSwitch indicates that a standalone switch is connected to it. This is because the column displays " $424MPTF20000027, " which matches the format of a Fortinet device serial number.
Here ' s a breakdown of the evidence in the image:
* Native VLAN:The " Native VLAN " column typically displays the VLAN ID for untagged traffic on a trunk port. However, in this case, it shows a serial number format ( " $424MPTF20000027 " ).
* No Trunk Information:The " Trunk " column is blank for port23, indicating it ' s not configured as a trunk member.
* Other Ports:Port1 and port2 show " default " in the " Native VLAN " column, which is the expected behavior for access ports.
Fortinet FortiSwitch devices typically don ' t display the serial number of adjacent FortiSwitch devices in the " Native VLAN " column. This column is reserved for VLAN information on trunk ports.