|
When users update FortiGate firmware to 7.6.1 or above and observe that a FortiSwitch goes offline, it is necessary to check the settings on the FortiLink enabled interface.
If Link-Layer Detection Protocol (LLDP) is set to disable/vdom under the FortiLink interface, use the following commands to enable it. This will bring the FortiSwitches online:
config system interface
edit <port>
set lldp-reception enable
set lldp-transmission enable
end
This behavior occurs due to a behavior change introduced in v 7.6.1 where the default method used to discover FortiLink members (i.e. set fortilink-neighbor-detect under config system interfaces) was changed from fortilink to lldp. LLDP must also be enabled for this fortilink-neighbor-detect method to work, which is why enabling lldp-reception and lldp-transmission is required.
For more info, refer to entry #1061121 on the following page: FortiOS 7.6.1 Release Notes (Changes in default behavior)
In case the above commands are already in place but still unable to bring up the FortiSwitch online, try to enable device-identification under the FortiLink interface.
config system interface
edit <port>
set device-identification enable
end
Related document:
Known issues
|
