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If a CPU spike hits tunmgr write or read timeout is observed with the below error on the console session:
NP6XLITE: __np6xlite_tunmgr_write:61 timeout
NP6XLITE: __np6xlite_tunmgr_write:70 timeout
Or:
NP6XLITE: __np6xlite_tunmgr_read:114 timeout
This known issue is tracked under Issue #1117005 and has been resolved in FortiOS v7.4.8, available on the Fortinet Support Portal.
Note: In some instances, this issue may cause the HA heartbeat to be lost, potentially leading to a split-brain scenario. It can also result in the loss of management access and disrupt all services, including console access.
The following workarounds can be applied:
- Disable npu-offload under the IPsec Phase1 settings:
config vpn ipsec phase1-interface
edit <Phase1 Name>
set npu-offload disable
end
Or:
-
Disable NP offloading:
config system np6xlite
edit np6xlite_0
set fastpath disable
end
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