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ATTO bridge unexpected reboot with Watchdog timer interruption

Last Updated:

Applies to

  • ONTAP 9
  • Fabric-Attached MetroCluster
  • ATTO 7500N Fibrebridge
  • ATTO firmware lower than 3.25


  • ATTO birdge goes through an unexpected reboot and the below notification is triggered in Autosupport:

System Notification (Bridge Unexpected Reboot: FB7500NX0XXXX) ALERT

  • The following events are seen in event logs:
[Node-01: dsbridge_admin: bridge.removed:info]: FC-to-SAS bridge Broc-sw2:6.126L0 [ATTO     FibreBridge7500N 3.10] S/N [FB7500NXXXXXX] was removed.
[Node-01: dsbridge_admin: bridge.discovered:info]: FC-to-SAS bridge Broc-sw2:6.126L0 [ATTO     FibreBridge7500N 3.10] S/N [FB7500NXXXXXX] was discovered.
[Node-01: dsbridge_admin: bridge.rebooted:debug]: FC-to-SAS bridge Broc-sw2:6.126L0 [ATTO     FibreBridge7500N 3.10] S/N [FB7500NXXXXXX] was rebooted.
[Node-01: dsbridge_admin: callhome.bridge.reboot.unexp:alert]: Call home for Bridge Unexpected Reboot: FB7500NXXXXXX
  •  ATTO bridge event logs show the following:

0C6711 15:57:50 10/11/20 INFO ResConf:0E1E1FBD90 Dvc:5000c500b8ad904e Rsvd:0E1E1FBD91
0C6712 15:59:44 10/11/20 INFO ResConf:0E1E1FBD91 Dvc:5000c500b8ad9f12 Rsvd:0E1E1FBD90
0C6713 15:59:44 10/11/20 INFO ResConf:0E1E1FBD91 Dvc:5000c500b8ad9f12 Rsvd:0E1E1FBD90
0C6714 16:00:47 10/11/20 INFO ResConf:0E1E1FBA71 Dvc:5000c500b8ae3996 Rsvd:0E1E1FBA70
0C6715 16:01:58 10/11/20 WARN SWWD 3521
0C6716 16:01:58 10/11/20 INFO SWWD Exception
0C6717 16:01:58 10/11/20 INFO 10/11/2020 16:01:58
0C6718 16:01:58 10/11/20 INFO ST[006be480-006c0480] | FP[006c02d4] CPSR[60000192]
0C6719 16:01:58 10/11/20 INFO 001494b4<-001dccdc | SP[006c02d8] FP[006c0304]
0C671A 16:01:58 10/11/20 INFO 001dc9c4<-001955ec | SP[006c0308] FP[006c0324]
0C671B 16:01:58 10/11/20 INFO 0019531c<-00192598 | SP[006c0328] FP[006c0334]
0C671C 16:01:58 10/11/20 INFO 00192584<-0000189c | SP[006c0338] FP[006c03b0]
0C671D 16:01:58 10/11/20 INFO 0018b10c<-002762f8 | SP[006c03b4] FP[006c03e0]
0C671E 16:01:58 10/11/20 INFO 002761cc<-001dcc24 | SP[006c03e4] FP[006c0410]
0C671F 16:01:58 10/11/20 INFO 001dc9c4<-001955ec | SP[006c0414] FP[006c0430]
0C6720 16:01:58 10/11/20 INFO 0019531c<-00192598 | SP[006c0434] FP[006c0440]
0C6721 16:01:58 10/11/20 INFO 00192584<-0000189c | SP[006c0444] FP[00010001]
0C6722 16:01:58 10/11/20 INFO FP out of range [6c0440]
0C6723 16:01:58 10/11/20 INFO Duplicate CPSR
0C6724 16:01:58 10/11/20 INFO Exception occurred. Possible redundant preceding log entries
0C6725 00:00:05 01/01/00 INFO Reset.  HW Code: Software Warm
0C6726 00:00:05 01/01/00 INFO Reset.  Reason: Watchdog Timer Interrupt Exception
0C6727 16:04:01 10/11/20 SYS  System date has changed. Current date:[10/11/2020]
0C6728 16:04:01 10/11/20 INFO Boot/reset occurred (007A)

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