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To limit bandwidth at the interface level, inbandwidth and outbandwidth are enabled on the interface as shown below:
config system interface
edit wan1
set inbandwidth 200000
set outbandwidth 200000
end
When the default-qos-type is shaping and port sharpers (inbandwith/outbandwidth) are configured on 3 or more interfaces, this issue is triggered.
Run the below command to check the default-qos-type,
FGT # show full-configuration system npu | grep qos -f
config system npu
set default-qos-type shaping<---
end
Run the below-listed commands 5 to 8 times during the time of the issue and share the log file with FortiOS TAC for further investigation/troubleshooting:
diag npu np7 pdq 0
diag npu np7 pba 0
diag npu np7 dsw-ingress-stats 0 verbose
diag npu np7 dsw-egress-stats 0 verbose
diag npu np7 sse-stats 0
diag npu np7 sse-cmd-stats 0
diag npu np7 dce-drop-all 0
diag npu np7 getreg 0 qtm.qtm_dbg
fnsysctl cat /proc/net/np7/np7_0/hif_que
fnsysctl cat /proc/net/np7/np7_0/hif_stats
fnsysctl cat /proc/net/np7/qtm
Workaround:
Change default-qos-type from shaping to policing as shown below:
config system npu
set default-qos-type policing
end
WARNING: When default-qos-type is set to shaping max-receive-unit should also be set to 6000, and all interface MTUs should be set to 6000 or less. Interface MTU will be lowered automatically.
The configuration will take effect after system reboot.
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