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ATTO Bridge reboots due to flapping FC port

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metrocluster
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Helpful 

Applies to

  • Fabric-attached MetroCluster
  • ONTAP 9
  • ATTO FB7500N
  • ATTO Firmware 3.17 and below

Issue

An ATTO Bridge reboots unexpectedly due to a flapping FC port.
 
Errors can be seen on the ATTO Bridge.
Example:
08:18:22 07/30/21 INFO FC Async Event, Link Down, PTP/Fabric, 16Gb on FC Port 1 
08:18:22 07/30/21 INFO FC Port 1 Link Down detected.
08:18:22 07/30/21 INFO FC Loop Is Not Operational on FC Port 1 
08:18:22 07/30/21 INFO FC Port ID 0x000000 [0x000] LogOut  Pt:00000000000000000 
08:18:22 07/30/21 INFO FC Port ID 0x000000 [0x000] LogOut  Pt:00000000000000000 
08:18:22 07/30/21 INFO Initiator 0000000000000000 logged out.
08:18:22 07/30/21 INFO Initiator 0000000000000000 logged out.
08:18:22 07/30/21 CRIT FC Chip Error, Status: 0x00000000, Error1: 0x00000000,
08:18:22 07/30/21 CRIT  Error2: 0x00000000 on FC Port 1 
08:18:22 07/30/21 CRIT Software Interrupt Exception Detected (SWI) (001H)
 
get fcporterrors all
; Fibre Channel Error Counts
; Port | Link Failures | Sync Loss | Signal Loss | Invalid Tx | Invalid CRC
;==========================================================================
   1              6110       44460             0       403860           144
   2                 1           4             0           28             0
 
Further errors can be seen in the EMS log on the cluster(s).
Example:
Fri Aug 13 13:54:59 +0200 [ClusterA-N1: dsbridge_admin: fc.bridge.fc.port.alert:alert]: Fibre Channel FibreBridge7500N Bridge ATTO_0000000000000000 S/N: FB7500N000000 WWN: 0000000000000000 FC Port FC_PORT1 offline. 
Fri Aug 13 14:03:06 +0200 [ClusterA-N1: dsbridge_admin: fc.bridge.fc.port.notice:notice]: Fibre Channel FibreBridge7500N Bridge ATTO_0000000000000000 S/N: FB7500N107128 WWN: 0000000000000000 FC Port FC_PORT1 connected. 

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