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Console cable only attached to the node or unconfigured may cause health alerts, prevent SP access and prevent failover

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Category:
ontap-9
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core
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Applies to

  • AFF Models
  • FAS Models
  • ONTAP 9

Issue

The following symptoms could be seen with a hanging dongle or unconfirgured console server:

  • Not able to login to SP using admin account
  • Various false health alerts may be reported which could lead to HW failure assumptions
  • Failed Takeover or Giveback

Below is an example of garbage characters flooding the console

Example:

Log Collection from: SERIALNUM=xxxxxxxxxxx SEQ=31 HOSTNAME=node01-1

================ Log #1 start time Thu Jan  1 00:00:56 1970

================ Log #1 truncated at Wed Apr 29 09:06:18 2020 ?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????!
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??????????????????????????????????????????????????????????????!
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???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????
================ Log #1 end time Wed Apr 29 09:06:35 2020

 

Verify using Autosupport Logs in your Active IQ Dashboard

  • CONSOLE.xml to look for garbage characters as displayed above
  • SP-Latest-Runtime To determine if there is a console connection to the node we can check for similar processes running in the Service Processor
/sbin/ngetty 115200 parallel
993 1 root D 6304 2% 0 22% /sbin/ngetty 115200 parallel
  • Visual inspection of console cabling could also apply.

 

 

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