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Cisco Bug: CSCvs01424 - Nexus56128P - kernel panic in fcpc process

Last Modified

May 25, 2020

Products (12)

  • Cisco Nexus 6000 Series Switches
  • Cisco Nexus 5548P Switch
  • Cisco Nexus 5596UP Switch
  • Cisco Nexus 5624Q Switch
  • Cisco Nexus 6004 Switch
  • Cisco Nexus 6001 Switch
  • Cisco Nexus 5672UP Switch
  • Cisco Nexus 5548UP Switch
  • Cisco Nexus 5696Q Switch
  • Cisco Nexus 56128P Switch
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Known Affected Releases


Description (partial)

kernel panic in fcpc process in Nexus56128P running 7.3(6)N1(1). This lead to switch reload.

From the kernel stack-trace, this seems to be a very corner case where fcpc was, in interrupt context, reading registers to get stats of FC interfaces. Before this could be  processed completely, there came another interrupt to receive FC2 packet and before this could be  processed completely, there came an apic_timer_interrupt.
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