Port Type Management

ConnectX®-3/ConnectX®-3 Pro/ConnectX®-4 ports can be individually configured to work as InfiniBand or Ethernet ports. By default both ConnectX®-5 VPI ports are initialized as InfiniBand ports. If you wish to change the port type use the mstconfig after the driver is loaded.

1. Install mstflint tools.

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   apt install mstflint
           

2. Check the device’s PCI address.

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   lspci | grep Mellanox
   Example:
   00:06.0 Infiniband controller: Mellanox Technologies MT27520 Family [ConnectX-3 Pro]
           

3. Use mstconfig to change the link type as desired IB – for InfiniBand, ETH – for Ethernet.

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   mstconfig –d <device pci> s LINK_TYPE_P1/2=<ETH|IB|VPI>
           

   Example:

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   # mstconfig -d 00:06.0 s LINK_TYPE_P1=ETH
    
   Device #1:
   ----------
   Device type:    ConnectX3Pro
   PCI device:     00:06.0
    
   Configurations:                              Current         New
            LINK_TYPE_P1                        IB(1)           ETH(2)
    
    Apply new Configuration? ? (y/n) [n] : y
   Applying... Done!
   -I- Please reboot machine to load new configurations.
           

4. Reboot your machine.

5. Query the device’s parameters to validate the new configuration.

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   # mstconfig -d 00:06.0 q
    
   Device #1:
   ----------
    
   Device type:    ConnectX3Pro
   PCI device:     0a:00.0
    
   Configurations:                              Current
            SRIOV_EN                            True(1)
            NUM_OF_VFS                          8
            LINK_TYPE_P1                        ETH(2)
            LINK_TYPE_P2                        IB(1)
            LOG_BAR_SIZE                        3
            BOOT_PKEY_P1                        0
            BOOT_PKEY_P2                        0
            BOOT_OPTION_ROM_EN_P1               True(1)
            BOOT_VLAN_EN_P1                     False(0)
            BOOT_RETRY_CNT_P1                   0
            LEGACY_BOOT_PROTOCOL_P1             PXE(1)
            BOOT_VLAN_P1                        1
            BOOT_OPTION_ROM_EN_P2               True(1)
            BOOT_VLAN_EN_P2                     False(0)
            BOOT_RETRY_CNT_P2                   0
            LEGACY_BOOT_PROTOCOL_P2             PXE(1)
            BOOT_VLAN_P2                        1
            IP_VER_P1                           IPv4(0)
            IP_VER_P2                           IPv4(0)