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Brocade switch ports bounced during "hafailover / hareboot / FOS upgrade to v7.4.2b" as per TSB 2018-271-A

Last Updated:

Applies to

  • All platforms that support FOS v7.4.2b 
  • Brocade switches


  • Due to a regression in FOS v7.4.2b, a switch may experience port bounce during firmware upgrade to FOS v7.4.2b
  • It can happen during warm recovery event such as hafailover and hareboot.
  • In case of switch warm recovery, FOS raslog will capture logging of C3-1037 and/or C3-1041 (or C3-1042), or C2-1037 and/or C2-1034 (or C2-1035) warning messages at the time of the port bounces.


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