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Node panic after migration from switched to switchless cluster

  1. Last updated
    Feb 24, 2025
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Category:
ontap-9
Specialty:
hw
Last Updated:
2/24/2025, 1:06:04 PM

Applies to

  • AFF A800 or AFF C800 with Dual 40/100G Ethernet T62100-MEZZ and/or T62100-CR (P/N X1146A) chipsets
  • AFF A320 onboard T6 ports e0g and e0h
  • Card T6 NIC (P/N X91146A)

Issue

  • New nodes added to cluster and data migrated via volume move.
  • After migration completed, old nodes removed from cluster and cluster transitioned from switched to switchless.
  • During this process, cables changed from 40G copper to 100G copper on cluster ports e0a and e1a.
  • After this swap, large number of CRC errors and long frames reported on both cluster ports on one node.
  • NodeIfInErrorsWarnAlert reported and system health subsystem show reports degraded cluster.
  • Node reporting CRC errors panics several times:

PANIC: Unknown key type 0 in SK process wafl_exempt18 on release 9.11.1P14 (C) on Sat Mar  2 00:27:34 IST 2024
PANIC: protection fault on VA 0 code 0 cs:rip 0x20:0xffffffff8a950af0 in process NwkThd_00 on release 9.11.1P14 (C) on Sat Mar  2 02:44:58 IST 2024

 

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