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Panic during HW upgrade from FAS8040 to A800 when transitioning to switchless

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aff-series
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HW
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Applies to

  • AFF A800 onboard T6 ports e0a and e0b
  • X1146A T6 NIC
  • ONTAP 9

Issue

  • HW upgrade from FAS8040 two-node switchless cluster to AFF A800 two-node switchless cluster
  • Temporary cluster network switches (Cisco Nexus C3232 at 40GbE speeds) used to add the AFF A800 HA pair to the cluster
  • Panic triggered when transitioning back to switchless connections using 100GbE cables.
  • Panic message example:
PANIC: page fault (supervisor read data, page not present) on VA 0 cs:rip 0x20:0xffffffff8d5eb4e7 rflags 0x10a07 in process NwkThd_02 on release 9.8P14 (C) on ...
version: 9.8P14: Tue Aug 23 11:33:04 EDT 2022

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