Troubleshooting Tip: LACP between FortiAP and FortiSwitch

• Refer to the below link to configure LACP on FortiAP: LAN port aggregation and redundancy
• Refer to the below links to configure LACP on FortiSwitch: config switch
• Managed FortiSwitches: Configuring ports using the GUI

FortiSwitch Configuration:

MCLAG switch

FSW#config switch trunk

    edit "FortiAP"
        set mode lacp-active
        set members "port7" "port8"

                 set mclag enable      <----- If AP is connected to dual-homed MCLAG switches, if not, ignore.
    next

        edit "FAPU"
            set mode lacp-active
            set members "port21" "port22"

                         set mclag enable            <----- If AP is connected to dual-homed MCLAG switches, if not, ignore.
        end

Debugging commands on FortiAP:

FortiAP-231F # pbond
.

Bonding Mode: IEEE 802.3ad Dynamic link aggregation
Transmit Hash Policy: layer3+4 (1)
MII Status: up
.

802.3ad info
LACP rate: slow
.
Aggregator selection policy (ad_select): stable
.
Number of ports: 2

Slave Interface: eth0
MII Status: up
Speed: 1000 Mbps
Duplex: full
.

.

Slave Interface: eth1
MII Status: up
Speed: 1000 Mbps
Duplex: full

FortiAP-231F # wcfg

lan1 : carrier=1, speed=1000, duplex=full
lan2 : carrier=1, speed=1000, duplex=full

FortiAP-231F # cfg -s

WANLAN_MODE:=AGGREGATE

FortiAP-231F # lldpctl

LLDP neighbors:
-------------------------------------------------------------------------------
Interface: eth0, via: LLDP, RID: 1, Time: 0 day, 00:35:26
Chassis:
ChassisID: mac 38:c0:ea
SysName: S648FFT
SysDescr: FortiSwitch-648F-FPOE v7.2.7,build6101,240304 (GA)
MgmtIP: 10.255.1.2
PortID: ifname port7
Port is aggregated. PortAggregID: 2

Interface: eth1, via: LLDP, RID: 1, Time: 0 day, 00:35:35
Chassis:
ChassisID: mac 38:c0:ea
SysName: S648FF
SysDescr: FortiSwitch-648F-FPOE v7.2.7,build6101,240304 (GA)
MgmtIP: 10.255.1.2
PortID: ifname port8
Port is aggregated. PortAggregID: 2

Debugging commands on FortiAP-U model:

FortiAP-U231F# ifconfig

bond0 Link encap:Ethernet HWaddr 00:0C:E6:
inet6 addr: fe80::20c:e6ff:fed5:ee62/64 Scope:Link
UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1
RX packets:1742 errors:0 dropped:868 overruns:0 frame:0
TX packets:2755 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1122456 (1.0 MiB) TX bytes:2600047 (2.4 MiB)

FortiAP-U231F# cat /proc/net/bonding/bond0

Bonding Mode: IEEE 802.3ad Dynamic link aggregation
Transmit Hash Policy: layer2 (0)
MII Status: up

802.3ad info
LACP rate: slow

Slave Interface: eth0
MII Status: up
Speed: 1000 Mbps
Duplex: full

Slave Interface: eth1
MII Status: up
Speed: 1000 Mbps
Duplex: full

Debugging commands on FortiSwitch:

FortiSwitch# diagnose switch physical-ports summary

Portname Status Tpid Vlan Duplex Speed Flags Discard

port7 up 8100 1 full 1G ,TL, none
port8 up 8100 1 full 1G ,TL, none

port21 up 8100 1 full 1G ,TL, none
port22 up 8100 1 full 1G ,TL, none

FortiSwitch# diagnose switch trunk summary

Trunk Name Mode PSC MAC Status Up Time

FortiAP lacp-active src-dst-ip 38:C0:EA:xx:xx:xx up(2/2) 0 days,0 hours,32 mins,55 secs

FAPU lacp-active src-dst-ip 38:C0:EA:xx:xx:xx up(2/2) 0 days,0 hours,19 mins,30 secs

FortiSwitch# diagnose switch trunk list

Trunk Name: FortiAP
Mode: lacp-active

Active Port Up Time
___________ _________________________

port7 0 days,0 hours,33 mins,38 secs
port8 0 days,0 hours,33 mins,38 secs

Trunk Name: FAPU
Mode: lacp-active
Active Port Up Time
___________ _________________________

port21 0 days,0 hours,20 mins,40 secs
port22 0 days,0 hours,3 mins,14 secs