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Onboard CX5-Mezzanine Ethernet ports are down

Last Updated:

Applies to

  • Onboard CX5-Mezzanine card
  • AFF A400 / AFF C400
  • FAS8300
  • FAS8700


  • Ports are down and fail to initialize.
slot 0: 10G/25G Ethernet Controller CX5-Mezz

e0e MAC Address:    d0:99:ea:99:99:85 (auto-unknown-fd-down)
e0f MAC Address:    d0:99:ea:99:99:86 (auto-unknown-fd-down)

slot 0: 10G/25G Ethernet Controller CX5-Mezz

e0g MAC Address:    d0:39:ea:99:99:83 (auto-unknown-fd-down)
e0h MAC Address:    d0:39:ea:99:99:84 (auto-unknown-fd-down)
  • dmesg messages when booting the node:
[14] mlx5_core2: <mlx5_core> mem 0x3817fc000000-0x3817fdffffff at device 0.0 on pci21
[14] changing device name from mlx5_core2 to e0g
[14] e0g: INFO: firmware version: 16.25.1020
[14] e0g: INFO: Module 0, status: error, Bus stuck(I2C or data shorted)
[14] e0g: mlx5_main::init_one called for



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