FortiLink over a point-to-point layer-2 network

Starting in FortiSwitchOS 6.4.0, you can run FortiLink mode over a point-to-point layer-2 network. You can form an inter-switch link (ISL) between two FortiSwitch units over a layer-2 device or non-FortiSwitch device (such as a wireless bridge). The LLDP destination MAC address is changed to the broadcast MAC address to bypass middle layer-2 devices. For example:

To create this topology, you configure ports on both ends of the link as described in the following procedure and, optionally, configure the tag protocol identifier (TPID) between the two FortiSwitch units.

NOTE:

• The set fortilink-p2p command is available in FortiLink mode and standalone mode. The set fortilink-p2p-tpid command is available only in FortiLink mode.
• The FS-108E, FS-108E-POE, FS-108E-FPOE, FS-124E, FS-124E-POE, FS-124E-FPOE, FS-148E, FS-148E-POE, FS-148F, FS-148F-POE, FS-148F-FPOE, FS-124F, FS-124F-POE, and FS-124F-FPOE models support only the default 0x8100 TPID; TPID changes are not supported.

1. Enable the FortiLink point-to-point network on each FortiSwitch unit:

   config switch physical-port

   edit <port_name>

   set fortilink-p2p enable

   end

2. Make certain that the FortiLink point-to-point TPID value is the same on each FortiSwitch unit. By default, it is 0x8100.

   config switch global

   set fortilink-p2p-tpid <0x0001-0xfffe>

   end