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Disk redundancy failed in MCCIP with ethernet controller port and switch port down

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Category:
ontap-9
Specialty:
metrocluster
Last Updated:

Applies to

  • ONTAP 9
  • Metrocluster IP configuration
  • Cisco N9K-C9336C-FX2

Issue

  • ONTAP reports the following on a daily basis:
    HA Group Notification (DISK REDUNDANCY FAILED) ERROR
  • sysconfig -a output shows that one of the data ethernet ports is down:
    slot 3: Dual 40G/100G Ethernet Controller CX6-DX
    e3a MAC Address:    d0:39:ea:e2:73:48 (auto-unknown-fd-down)
  • show interface brief output from the connected Nexus switch shows that the the connected switch port is also down:
    Nexus-Switch-1(config-if)# show interface brief | grep 33
    Eth1/5          33      eth  trunk  up      none                  100G(D) --
    Eth1/6          33      eth  trunk  up      none                     100G(D) --
    Eth1/17         33 eth  trunk  up      none                     100G(D) --
    Eth1/18         33      eth  trunk  down    Link not connected auto(D) --
  • Disk paths for the affected ethernet data port are missing from DISK-PATHS.XML
  • System Storage Configuration changed from Quad-Path HA to Mixed-Path HA
  • The cable between the ports has been reseated but the issue persists
  • The Nexus switch port has been bounced but the issue persists

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