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The 221E models - including Gen1, Gen2, Gen3 - sometimes do not show with the online state when the FortiGate is upgraded to v7.4.2.
See below for an example of the reply received by a diagnose command on the FortiGate when this error occurs. Here, the FortiGate shows the error 'reason 8 -- Control message maximal retransmission limit reached':
diagnose wireless-controller wlac -c wtp
-------------------------------WTP 1----------------------------
WTP vd : root, 0-FP221ETF18091550 MP00
uuid : b08c66c6-ae8d-51ee-cc38-da14b28a3549
mgmt_vlanid : 0
region code : C invalid
refcnt : 2 own(1) wtpprof(1) deleted(no)
apcfg status : N/A,N/A cfg_ac=0.0.0.0:0 val_ac=0.0.0.0:0 cmds T 0 P 0 U 0 I 0 M 0
apcfg cmd details:
plain_ctl : disabled
image-dl(wtp,rst): yes,no
admin : enable
wtp-profile : cfg(fap221ecn) override(disabled) oper(fap221ecn)
wtp-mode : normal
wtp-wanlan-mode : wan-only
cfg-apcfg-prof :
oper-apcfg-pro :
bonjour-profile :
wtp-group :
name :
location :
region-map :
pos-x : 0
pos-y : 0
ble-major-id : 0 (wtp: 0, grp: 0, prof: 0)
ble-minor-id : 0 (wtp: 0, prof: 0)
led-blink : disabled
led-state : enabled
led-schedules :
poe mode : auto(auto)
poe-mode-oper : auto
ext-info-enable : enabled
ip-frag-prevent : TCP_MSS
tun-mtu : 0,0
split-tunneling-acl-path : local
split-tunneling-local-ap-subnet : disabled
active sw ver : FP221E-v7.2-build0337
local IPv4 addr : 192.168.10.3
board mac : e8:1c:ba:43:a7:00
join_time : Sat Jan 13 09:15:47 2024
mesh-uplink : ethernet
mesh hop count : 0
parent wtp id :
connection state : Disconnected (0-0.0.0.0:0)
image download progress: 0 (upd-init,1128159 hold 0 rst 0)
last failure : 8 -- Control message maximal retransmission limit reached
last failure param: N/A
last failure time: Wed Jan 17 12:21:54 2024
station info : 0/0
geo : World (0)
deployment : cfg platform-determined oper indoor
The issue is triggered by a FortiOS timezone change in 7.4.2. A workaround is to reboot the FAP221E, but the final solution is to install FAP_221E-v700-build4156-FORTINET under the FortiAP. Open a ticket with Fortinet TAC support to get this version. After installing it, the FAP221E model will be able to go online without any interruption.
One extra step always validates the FortiOS vs FortiAP compatibility table, an exception may occur with FortiOS v7.4.2:
FortiAP-W2 - FortiAP and FortiOS compatibility matrix.
Additionally, consider the ideal FortiAP upgrade path before upgrading FortiAP directly to the final desired version to avoid unexpected behavior.
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