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MAC addresses, GUIDs, and other parameters are assigned to VNICs.
Note - This procedure creates a host MAC address file, used to create VNICs in host manual mode.
Note - Each MAC address must be unique and not 00:00:00:00:00:00.
Note - Only even numbers are supported for the most significant byte of the MAC address (unicast).
# ibv_devinfo hca_id: mlx4_0 fw_ver: 2.5.9266 node_guid: 0003:ba00:0100:c708 sys_image_guid: 0003:ba00:0100:c70b . . . #
In the example, the hca_id value is mlx4_0, and the HCA port GUID (sys_image_guid) is 003ba000100c70b.
Note - Do not use VLAN identifiers 1 and 4095.
Note - Due to hardware limitations for MultiCast groups, there is a maximum of 1000 VLANs.
An example entry in the host MAC address file might look like this:
1 00:30:48:7d:de:e4 cupcake mlx4_0 1 0003ba000100c70b 0 0A-ETH-1
For this example:
1 is the entry number. This will become the VNIC number and eth number.
00:30:48:7d:de:e4 is the MAC address.
cupcake is the host name and is used to identify the location of the VNIC.
mlx4_0 is the value of the hca_id field and is called the device name.
1 is the port of the HCA.
0003ba000100c70b is the HCA port GUID.
0 is the VLAN identifier.
0A-ETH-1 is the connector.