Technical Tip: IPsec tunnel will get stuck and drop packets due to 'engine_status = 00000000' in np6Xlite register

[totsuka]

Description	This article describes how to troubleshoot and use a workaround or fix for scenarios where IPsec VPN traffic unexpectedly stops.
Scope	NP6, NP6xlite, SOC4 model.
Solution	Troubleshooting: Execute the following CLI command several times and confirm that the output continues to show '00000000'. diagnose npu np6xlite register 0 | grep engine_status engine_status =00000000 [16:23] Cause: If the value continues to show '00000000', the IPsec Engine will hang due to NP buffer limitation. Workaround: Disable NPU offloading. config firewall policy     edit <policy_name>         set auto-asic-offload disable     next end Fix: Upgrade to one of the following versions for a fix: v7.4.10. v7.6.5. v8.0.0.