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FortiGate Next Generation Firewall utilizes purpose-built security processors and threat intelligence security services from FortiGuard labs to deliver top-rated protection and high performance, including encrypted traffic.

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sachitdas_FTNT Staff rank Staff
Created on Jun 1, 2023 2:12:31 PM
Edited on Feb 24, 2025 9:33:32 AM
Troubleshooting Tip: Failed DIAG-CONTROL check sequence
DescriptionThis article describes how to fix an error seen on FortiSwitch logs: 'failed DIAG-CONTROL Check Sequence'.ScopeFortiSwitch version 6.4.x and above.Solution If the SFP ports repeatedly go 'Up' and 'Down' due to...
DIAG-CONTROL Check Sequence flap FortiSwitch Module port SFP SFP+ troubleshooting Transceiver
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vpatil Staff rank Staff
Created on Jan 5, 2021 6:41:13 PM
Edited on Jun 1, 2023 1:36:06 PM
Troubleshooting Tip: SFP module port flap OR port not coming UP due to Module in ERROR state
DescriptionThis article describes about the probable cause and fixes for FortiSwitch 'Module in ERROR state' error.ScopeFSW version 6.4.x and above- FortiSwitch SFP/SFP+ port may not come up OR the port will keep flappin...
error failed BASE ID Check Sequence FortiSwitch Module SFP SFP+ troubleshooting Transceiver
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